{"cik":1452936,"entityName":"PACIFIC OAK STRATEGIC OPPORTUNITY REIT, INC.","facts":{"dei":{"EntityCommonStockSharesOutstanding":{"label":"Entity Common Stock, Shares Outstanding","description":"Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.","units":{"shares":[{"end":"2011-08-05","val":12925366,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-11-01","val":16439547,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2012-03-06","val":24867612,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2012Q1I"},{"end":"2012-05-04","val":28571287,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2012-08-03","val":34833259,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-11-02","val":51263486,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2013-03-04","val":58121547,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2013Q1I"},{"end":"2013-05-07","val":58343182,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2013-08-02","val":58335957,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-11-04","val":58164360,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2014-03-03","val":59553656,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2014Q1I"},{"end":"2014-05-06","val":59656918,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2014-08-04","val":59716153,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-11-07","val":59884462,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2015-03-03","val":59989107,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2015Q1I"},{"end":"2015-05-11","val":60170398,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2015-08-12","val":59905120,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-11-09","val":58555669,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2016-03-23","val":58692893,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2016Q1I"},{"end":"2016-05-09","val":58667765,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2016-08-08","val":58645297,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-11-04","val":57039883,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2017-03-06","val":56738435,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2017Q1I"},{"end":"2017-05-05","val":56675205,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2017-08-07","val":56630735,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-11-09","val":52107629,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2018-03-05","val":64700782,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2018Q1I"},{"end":"2018-05-04","val":64745585,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2018-08-07","val":54640201,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-11-05","val":54207256,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2019-03-04","val":66809639,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2019Q1I"},{"end":"2019-05-10","val":66572556,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2019-08-05","val":66321336,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-11-04","val":66081167,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2020-03-23","val":65847283,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2020Q1I"},{"end":"2020-05-19","val":69259122,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2020-08-05","val":69225016,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-11-11","val":98198922,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2021-03-24","val":98027369,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2021Q1I"},{"end":"2021-05-05","val":97949906,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2021-08-04","val":97869182,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-11-10","val":93896447,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2022-03-23","val":104518999,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2022Q1I"},{"end":"2022-05-06","val":104420389,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2022-08-10","val":104140141,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-11-11","val":104041817,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2023-03-27","val":103831104,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2023Q1I"},{"end":"2023-05-10","val":103740412,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2023-08-09","val":103610544,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-11-13","val":103407427,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2024-03-28","val":103257859,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2024Q1I"},{"end":"2024-05-08","val":103159315,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2024-08-07","val":102951952,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-11-06","val":102951395,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2025-03-25","val":102951395,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2025Q1I"},{"end":"2025-05-09","val":102951395,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2025-08-12","val":102951395,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-11-12","val":102951395,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"EntityPublicFloat":{"label":"Entity Public Float","description":"The aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of the registrant's most recently completed second fiscal quarter.","units":{"USD":[{"end":"2011-06-30","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2011Q2I"},{"end":"2012-06-30","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q2I"},{"end":"2013-06-30","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q2I"},{"end":"2014-06-30","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q2I"},{"end":"2015-06-30","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q2I"},{"end":"2016-06-30","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q2I"},{"end":"2017-06-30","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q2I"},{"end":"2018-06-30","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q2I"},{"end":"2019-06-30","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q2I"},{"end":"2020-06-30","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q2I"},{"end":"2021-06-30","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q2I"},{"end":"2022-06-30","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q2I"},{"end":"2023-06-30","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q2I"},{"end":"2024-06-30","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q2I"}]}}},"srt":{"RealEstateFederalIncomeTaxBasis":{"label":"SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Federal Income Tax Basis","description":"Cost basis of real estate investments for federal income tax purposes for entities with a substantial portion of business acquiring and holding investment real estate.","units":{"USD":[{"end":"2019-12-31","val":940100000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-12-31","val":1600000000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-12-31","val":1500000000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-12-31","val":1700000000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-12-31","val":1700000000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-12-31","val":1600000000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"}]}}},"us-gaap":{"AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent":{"label":"Accounts Payable and Accrued Liabilities","description":"Sum of the carrying values as of the balance sheet date of obligations incurred through that date, including liabilities incurred and payable to vendors for goods and services received, taxes, interest, rent and utilities, compensation costs, payroll taxes and fringe benefits (other than pension and postretirement obligations), contractual rights and obligations, and statutory obligations.","units":{"USD":[{"end":"2010-12-31","val":917000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":917000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":917000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":741000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":1742000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":2235000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":2235000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":2235000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":2235000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":2235000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":2039000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":3055000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":5247000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":5995000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":5995000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":5995000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":5995000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":5995000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":6700000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":9525000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":14767000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":15558000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":15558000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":15558000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":15558000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":15558000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":15027000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":15309000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":17176000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":18609000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":18609000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":18609000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":18609000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":18609000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":13339000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":17106000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":22006000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":17543000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":17543000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":17543000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":17543000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":17543000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":17734000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":20181000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":22768000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":26624000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":26624000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":26624000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":26624000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":26624000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":30520000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":29059000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":27473000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":16686000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":16686000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":16686000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":16686000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":16686000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":15123000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":18700000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":17788000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":19506000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":19506000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":19506000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":19506000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":19506000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":14100000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":20142000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":19320000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":21329000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":21329000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":21329000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":21329000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":21329000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":14047000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":16220000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":15579000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":24169000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":24169000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":24169000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":24169000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":24169000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":18895000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":25972000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":22054000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":23852000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":23852000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":23852000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":23852000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":23852000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":18803000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":24595000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":27236000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":25231000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":25231000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":25231000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":25231000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":25231000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":18218000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":22203000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":22706000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":30409000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":30409000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":30409000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":30409000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":30409000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":27138000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":27963000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":27724000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":31233000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":31233000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":31233000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":30492000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":24693000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":35181000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":26403000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"AccountsReceivableNet":{"label":"Accounts Receivable, after Allowance for Credit Loss","description":"Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.","units":{"USD":[{"end":"2010-12-31","val":47000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":47000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":47000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":63000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":186000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":510000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":510000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":510000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":510000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":510000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":865000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":1460000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":1971000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":2863000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":2863000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":2863000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":2757000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":2678000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":4061000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":5812000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":7542000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":8603000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":8603000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":8603000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":8540000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":8540000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":12053000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":14827000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":16900000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":18314000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":18283000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":18283000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":18283000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":18283000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":21155000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":22364000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":22926000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":24487000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":24487000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":24487000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":24487000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":24487000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":25706000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":26624000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":28228000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":28264000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":28264000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":27521000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":27521000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":6932000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":29518000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":30611000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":30252000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":9821000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":9821000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":8755000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":8755000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":7111000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":11932000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":12464000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":14103000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":12292000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":12292000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":12095000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":12095000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":10876000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":13607000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":15874000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":17498000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":16593000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":16593000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":16593000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":16593000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":16593000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":18014000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":18120000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":19607000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":25911000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":25911000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":22212000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":22212000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":22212000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":26605000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":21716000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":24730000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":21795000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":21795000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":21795000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":21795000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":21795000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":19775000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":23220000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":21140000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":21518000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":21518000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":21518000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":21518000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":21518000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":22828000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":23323000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":21992000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":22500000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":22500000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":22500000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":22500000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":22500000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":22109000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":23234000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":23499000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":22084000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"}]}},"AccretionAmortizationOfDiscountsAndPremiumsInvestments":{"label":"Accretion (Amortization) of Discounts and Premiums, Investments","description":"The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":286000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":-286000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":574000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":-574000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":-775000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":-775000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":-819000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":-819000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":-819000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":-13000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-24000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-09-30","val":-31000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-12-31","val":-36000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":-36000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":-36000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-9000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-12-31","val":-9000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":-9000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":-9000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":47000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":47000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":47000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":69000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":69000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":348000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":348000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":456000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":456000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":565000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":565000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":565000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":107000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":107000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":128000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":128000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":104000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":104000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":108000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":108000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":108000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":13000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":13000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":13000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":13000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":13000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":13000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":13000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":13000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":13000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021"}]}},"AccretionExpense":{"label":"Accretion Expense","description":"Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present values. Excludes accretion associated with asset retirement obligations.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-03-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-09-30","val":-26000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-26000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":-454000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012"},{"start":"2012-01-01","end":"2012-12-31","val":-454000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2013-01-01","end":"2013-03-31","val":-409000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-858000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":-450000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-12-31","val":-1186000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013"}]}},"AccumulatedOtherComprehensiveIncomeLossNetOfTax":{"label":"Accumulated Other Comprehensive Income (Loss), Net of Tax","description":"Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.","units":{"USD":[{"end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-12-31","val":-46000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":-46000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":-46000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":-46000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":-46000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":296000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":114000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":232000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":-13000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":-13000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":-13000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":-13000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":-13000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":-7000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":-9000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":-5000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":-9000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":-9000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":-9000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":-9000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":-9000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-06-30","val":849000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":3714000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":25146000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":25146000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":25146000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":25146000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":25146000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":0,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":0,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"}]}},"AdditionalPaidInCapital":{"label":"Additional Paid in Capital","description":"Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.","units":{"USD":[{"end":"2010-12-31","val":42988000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":42988000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":42988000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":96912000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":127615000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":188817000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":188817000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":188817000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":188817000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":188817000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":224717000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":274691000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":347118000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":505907000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":505907000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":505907000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":505907000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":505907000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":505844000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":505776000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":505765000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":512036000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":512036000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":512036000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":512036000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":512036000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":512971000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":512968000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":512966000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":524489000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":524489000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":524489000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":524489000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":524489000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":524487000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":524487000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":507500000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":504303000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":504303000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":504303000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":504303000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":504303000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":504047000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":480362000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":455378000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":455373000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":455373000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":455373000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":455373000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":455373000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":455221000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":455221000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":405220000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":388800000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":388800000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":388800000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":388800000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":388800000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":538972000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":434935000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":428622000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":547770000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":547770000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":547770000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":547770000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":547770000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":547775000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":547767000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":547750000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":553170000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":553170000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":553170000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":553170000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":553170000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":553136000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":553129000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":553129000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":831295000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":831295000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":831295000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":831295000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":831295000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":831295000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":829294000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":820382000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":818440000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":818440000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":818440000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":818440000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":818440000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":914460000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":914463000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":909533000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":907044000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":907044000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":907044000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":907044000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":907044000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":907045000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":905046000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":901048000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":901049000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":901049000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":901049000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":901049000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":901049000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":901050000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":899052000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":898682000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":898682000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":898682000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":898682000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":898682000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":898682000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":898602000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":898602000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"AdjustmentForAmortization":{"label":"Amortization","description":"The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives.","units":{"USD":[{"start":"2012-01-01","end":"2012-09-30","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-03-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-09-30","val":-40000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2014-01-01","end":"2014-03-31","val":-12000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1"}]}},"AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts":{"label":"Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs","description":"Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":3444000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-12-31","val":3444000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":3444000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":3444000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":1319000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-09-30","val":2608000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-12-31","val":3512000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":3512000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2011-01-01","end":"2011-12-31","val":3512000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-12-31","val":3512000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":3512000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":3512000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":896000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":1710000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-09-30","val":2520000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":3636000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":3636000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2012-01-01","end":"2012-12-31","val":3636000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-12-31","val":3636000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":3636000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":3636000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":63000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":109000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-09-30","val":120000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-12-31","val":125000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":125000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2013-01-01","end":"2013-12-31","val":125000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-12-31","val":125000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":125000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":125000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":2000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":2000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-12-31","val":12000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":12000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2014-01-01","end":"2014-12-31","val":12000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-12-31","val":12000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":12000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":12000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":9000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":9000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2015-01-01","end":"2015-12-31","val":9000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-12-31","val":9000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":9000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":9000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-12-31","val":7000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":7000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2016-01-01","end":"2016-12-31","val":7000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-12-31","val":7000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":7000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":7000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":8000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":8000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2017-01-01","end":"2017-12-31","val":8000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-12-31","val":8000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":8000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":8000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-09-30","val":1000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":1000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":11000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":11000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":11000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":2000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":2000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":2000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":2000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":6000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":6000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":4000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":4000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":27000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":27000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":27000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-06-30","val":7000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":7000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":7000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":7000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":6000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":6000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":19000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":19000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":19000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":15000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":15000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":15000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"}]}},"AdministrativeFeesAmountPaid":{"label":"Administrative Fees, Amount Paid (Deprecated 2013-01-31)","description":"Amount paid to managing member or general partner, affiliate of managing member or general partner, or affiliate of limited liability company (LLC) or limited partnership (LP) for administrative services provided to the LLC or LP, for example, but not limited to, salaries, rent, or other overhead costs.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":16000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":23000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":12000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":38000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":15000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":60000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2011-01-01","end":"2011-12-31","val":60000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-03-31","val":16000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":36000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-06-30","val":36000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":20000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-04-01","end":"2012-06-30","val":20000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-09-30","val":70000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":70000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":34000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-07-01","end":"2012-09-30","val":34000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":103000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012"},{"start":"2012-01-01","end":"2012-12-31","val":103000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2013-01-01","end":"2013-03-31","val":25000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":58000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":33000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":102000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":44000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":134000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013"}]}},"AffiliateCosts":{"label":"Affiliate Costs","description":"Costs associated with revenues arising from an entity that is an affiliate of the reporting entity by means of direct or indirect ownership.","units":{"USD":[{"start":"2017-01-01","end":"2017-12-31","val":10686000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":8525000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":8525000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":1891000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":3861000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":1971000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":5954000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":2093000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":8158000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":8158000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":8158000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":2106000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":2106000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":4441000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":4441000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":2336000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":2336000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":6867000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":6867000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":2426000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":2426000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":9982000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":9982000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":9982000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":3852000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":3852000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":7380000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":7380000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":3527000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":3527000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":10802000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":10802000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":3422000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":3422000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":14012000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":14012000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":14012000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":3127000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":3127000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":6315000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":6315000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":3189000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":3189000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":9945000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":9945000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":3630000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":3630000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":13678000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":13678000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":13678000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":3973000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":3973000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":7684000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":7684000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":3710000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":3710000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":11380000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":11380000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":3696000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":3696000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":15415000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":15415000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":4102000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":4102000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":7974000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":7974000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":3872000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":3872000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":11875000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":11875000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":3901000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":3901000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":15551000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":2657000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":5396000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":2739000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":7694000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":2298000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"AmortizationOfAboveAndBelowMarketLeases":{"label":"Amortization of above and below Market Leases","description":"Amount of non-cash amortization of intangible asset (liability) for above and below market leases.","units":{"USD":[{"start":"2013-01-01","end":"2013-06-30","val":341000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":214000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":138000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-354000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-673000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":-673000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":-1013000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":-1013000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":-1339000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":-1339000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":-221000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":-221000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-408000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":-408000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":-601000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":-601000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":-645000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":-645000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":-645000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-188000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":-188000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":-449000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":-449000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":-1375000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":-1375000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":-2330000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":-2330000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":-2330000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":-894000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":-894000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":-2037000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":-2037000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":-2253000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":-2253000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":-2575000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":-2575000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":-2575000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":-226000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":-226000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-500000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":-500000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":-853000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":-853000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":-1152000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":-1152000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":-1152000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-252000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":-252000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-536000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":-536000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":-856000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":-856000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":-1091000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":-1091000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":-1091000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-177000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":-177000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-316000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":-316000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":-435000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":-435000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":-852000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":-852000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":-852000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":-326000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":-326000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":-720000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":-720000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":-1015000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":-1015000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":-1278000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":-1278000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":-1278000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-256000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":-256000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-508000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":-508000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":-762000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":-762000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":-1007000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":-1007000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-175000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":-175000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-151000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-09-30","val":-306000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":-255000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-339000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1"}]}},"AmortizationOfDebtDiscountPremium":{"label":"Amortization of Debt Discount (Premium)","description":"Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":-40000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":-92000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":-92000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":-92000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-12000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-9000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":-9000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":-6000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":-6000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":-1000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":-1000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":-1000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":5000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":5000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":11000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":11000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":18000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":18000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":25000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":25000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":25000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":9000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":9000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":17000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":17000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":28000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":28000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":38000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":38000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":38000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":11000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":11000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":23000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":23000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":36000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":36000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":49000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":49000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":49000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":14000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":14000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":29000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":29000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":45000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":45000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":61000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":61000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":61000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-20000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":-20000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-46000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":-46000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":-73000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":-73000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":-99000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":-99000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":-99000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-25000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":-25000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-51000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":-51000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":-25000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":14000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":14000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":64000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":602000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":602000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":602000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":482000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":482000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":1445000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":1400000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":1000000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":1000000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":1906000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":500000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":500000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":1900000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":2721000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":2721000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":1016000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":1016000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":2300000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":2300000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":1200000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":1200000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":3400000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":1100000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":4784000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":1103000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":2200000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":1100000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2"}]}},"AmortizationOfDeferredLoanOriginationFeesNet":{"label":"Amortization of Deferred Loan Origination Fees, Net","description":"The net increase(decrease) in interest income during the period representing the allocation of deferred loan origination fees less deferred loan origination costs using the effective interest method over the term of the debt arrangement to which they pertain taking into account the effect of prepayments.","units":{"USD":[{"start":"2012-01-01","end":"2012-06-30","val":700000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"}]}},"AmortizationOfFinancingCosts":{"label":"Amortization of Debt Issuance Costs","description":"Amount of amortization expense attributable to debt issuance costs.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":24000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":24000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":24000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":72000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":72000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":151000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":151000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":100000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":223000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":223000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":100000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":295000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":295000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":295000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":193000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":193000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":324000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":324000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":565000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":565000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":976000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":976000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":976000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":593000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":593000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":1575000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":1575000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":1000000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":2166000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":2166000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":600000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":2778000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":2778000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":2778000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":731000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":731000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":1532000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":1532000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":800000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":800000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":2118000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":2118000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":600000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":600000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":2703000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":2703000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":2703000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":721000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":721000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":1772000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":1772000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":1000000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":1000000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":2908000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":2908000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":1100000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":1100000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":4289000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":4289000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":4289000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":1299000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":1299000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":2592000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":2592000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":1300000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":1300000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":3578000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":3578000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":1000000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":1000000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":4363000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":4363000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":4363000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":789000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":789000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":1699000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":1699000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":900000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":900000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":2675000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":2675000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":1000000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":3640000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":3640000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":3640000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":869000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":869000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":1709000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":1709000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":800000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":800000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":2683000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":2683000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":3606000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":3606000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":3606000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":885000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":885000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":1677000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":1677000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":800000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":800000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":2481000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":2481000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":800000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":3311000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":3311000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":3311000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":813000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":813000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":1578000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":1600000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":800000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":800000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":2470000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":2500000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":800000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":800000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":3157000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":3157000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":5900000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":680000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":680000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":1600000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":3844000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":800000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":2600000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":5953000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":1000000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":3727000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":8500000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":8500000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":1323000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":2400000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":4567000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":4600000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":2200000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":7079000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":7100000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":2500000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":9600000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":9600000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":2300000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":2300000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":4800000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":4800000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":2500000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":2500000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":7300000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":7300000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":2500000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":2500000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":9400000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":1900000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":3600000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":1700000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":5400000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":1800000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"AmortizationOfIntangibleAssets":{"label":"Amortization of Intangible Assets","description":"The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-09-30","val":10000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":32000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":32000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":30000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":111000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":111000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":298000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":298000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":613000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":613000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":613000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":280000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":280000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":559000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":559000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":772000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":772000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":1088000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":1088000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":1088000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":244000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":244000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":341000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-09-30","val":214000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-12-31","val":138000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":138000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-354000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-12-31","val":-1339000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014"}]}},"AmortizationOfLeaseIncentives":{"label":"Amortization of Lease Incentives","description":"Amount of amortization of lease incentive costs incurred by the lessor for the benefit of the lessee.","units":{"USD":[{"start":"2014-01-01","end":"2014-03-31","val":1200000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1"}]}},"AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount":{"label":"Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount","description":"Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.","units":{"shares":[{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3"}]}},"AreaOfLand":{"label":"Area of Land","description":"Area of land held.","units":{"acre":[{"end":"2012-12-31","val":6,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q4I"}]}},"AreaOfRealEstateProperty":{"label":"Area of Real Estate Property","description":"Area of a real estate property.","units":{"sqft":[{"end":"2012-06-30","val":1400000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":2100000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":2700000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"},{"end":"2013-03-31","val":3200000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":3800000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":4100000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":4100000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"},{"end":"2014-03-31","val":4600000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":4600000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":4600000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":4600000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-03-31","val":4500000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":4500000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":4400000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":4400000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-03-31","val":4400000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":5200000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":5500000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":5500000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-03-31","val":6000000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":5800000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":6000000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":2700000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":3700000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":3800000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":3800000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2019-03-31","val":3000000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":3400000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":3400000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"}]}},"AssetManagementCosts":{"label":"Asset Management Costs (Deprecated 2018-01-31)","description":"The aggregate costs related to asset management during the reporting period.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-04-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":6000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-07-01","end":"2010-09-30","val":6000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":30000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":30000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":41000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":113000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":113000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":72000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-04-01","end":"2011-06-30","val":72000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":193000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":193000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":80000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-07-01","end":"2011-09-30","val":80000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":328000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":328000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":302000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":291000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":291000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":638000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":628000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":348000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":343000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":1099000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":1052000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":460000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":445000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":1710000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":1625000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":1625000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":764000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":731000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":1728000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":1665000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":966000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":934000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":2935000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":2868000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":1226000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":1203000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":4068000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":4068000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":4068000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":1609000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":1609000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":3518000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":3518000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":1909000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":1909000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":5567000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":5567000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":2049000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":2049000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":7648000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":7648000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":7648000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":2053000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":2053000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":4130000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":4130000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":2077000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":2077000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":6242000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":6242000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":2112000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":2112000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":8348000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":8348000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":8348000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":2088000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":2088000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":4293000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":4293000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":2205000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":2205000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":6932000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":6932000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":2639000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":2639000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":9628000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":9628000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":9628000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":2748000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":2748000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":5603000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":5603000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":2856000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":2856000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":8404000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":8404000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":2800000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":2800000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":10686000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":10686000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":1825000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":1825000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":4043000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":2217000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":6342000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":2299000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":8525000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":1891000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1"}]}},"Assets":{"label":"Assets","description":"Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.","units":{"USD":[{"end":"2010-12-31","val":42404000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":42404000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":42404000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":93644000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":129861000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":258463000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":258463000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":258463000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":258463000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":258463000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":290576000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":328400000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":378119000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":537928000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":537928000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":537928000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":537928000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":537928000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":582495000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":687556000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":725551000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":776138000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":776138000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":776138000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":776138000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":776138000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":988924000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":1013056000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":1020270000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":1022514000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":1022514000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":1022514000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":1022514000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":1016313000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":1040737000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":1024887000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":1022340000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":1004214000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":1004214000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":1004214000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":1004214000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":1004214000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":1267496000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":1224271000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":1306090000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":1310116000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":1310116000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":1310116000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":1310116000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":1310116000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":1363676000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":1402502000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":1344353000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":1101574000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":1101574000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":1101574000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":1101574000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":1101574000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":1121823000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":1104454000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":1109499000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":1004989000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":1004989000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":1004989000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":1004989000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":1004989000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":944482000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":1017453000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":1009979000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":1041242000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":1041242000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":1041242000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":1041242000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":1041242000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":1042919000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":1065855000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":1103400000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":1731665000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":1731665000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":1731665000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":1731665000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":1731665000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":1762053000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":1792849000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":1629128000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":1584619000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":1584619000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":1584619000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":1584619000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":1584619000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":1558295000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":1613455000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":1564367000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":1559245000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":1559245000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":1559245000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":1559245000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":1559245000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":1527741000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":1414576000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":1406391000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":1388143000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":1388143000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":1388143000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":1388143000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":1388143000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":1214633000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":1229234000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":1109310000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":1124956000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":1124956000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":1124956000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":1124956000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":1077301000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":1012911000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":884799000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"AssetsHeldForSaleNotPartOfDisposalGroup":{"label":"Assets Held-for-sale, Not Part of Disposal Group","description":"Amount of assets held-for-sale that are not part of a disposal group.","units":{"USD":[{"end":"2020-12-31","val":5680000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":5680000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":5680000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-06-30","val":6253000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":919000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":919000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":919000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":919000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":0,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"}]}},"AssetsOfDisposalGroupIncludingDiscontinuedOperation":{"label":"Disposal Group, Including Discontinued Operation, Assets","description":"Amount classified as assets attributable to disposal group held for sale or disposed of.","units":{"USD":[{"end":"2011-12-31","val":158000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-12-31","val":118000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":118000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":118000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":616000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":916000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":417000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":126000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":98000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2020-12-31","val":145919000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":145919000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q4I"},{"end":"2021-06-30","val":148559000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"}]}},"AvailableForSaleDebtSecuritiesAmortizedCostBasis":{"label":"Debt Securities, Available-for-sale, Amortized Cost","description":"Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).","units":{"USD":[{"end":"2011-12-31","val":58648000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q4I"},{"end":"2011-12-31","val":58648000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2012-06-30","val":36191000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":23981000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":4830000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q4I"},{"end":"2012-12-31","val":4830000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":4830000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2013-03-31","val":3019000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":2571000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":1536000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":342000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q4I"},{"end":"2014-03-31","val":19000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"}]}},"AvailableForSaleEquitySecuritiesAccumulatedGrossUnrealizedGainBeforeTax":{"label":"Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax","description":"Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in equity securities classified as available-for-sale.","units":{"USD":[{"end":"2017-12-31","val":25146000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":25146000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":25146000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":9135000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":17859000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":18521000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"}]}},"AvailableForSaleEquitySecuritiesAmortizedCostBasis":{"label":"Available-for-sale Equity Securities, Amortized Cost Basis","description":"This item represents the cost of equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments for other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.","units":{"USD":[{"end":"2017-12-31","val":64917000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":64917000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":64917000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":79880000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":80768000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":80214000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"}]}},"AvailableForSaleSecurities":{"label":"Available-for-sale Securities","description":"Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.","units":{"USD":[{"end":"2012-06-30","val":35721000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":23712000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":4785000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"},{"end":"2013-03-31","val":2987000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":2550000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-06-30","val":39844000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":47022000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":90063000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"}]}},"AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax":{"label":"Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax","description":"Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.","units":{"USD":[{"end":"2016-12-31","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-09-30","val":3714000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":25146000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"}]}},"AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax":{"label":"Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax","description":"Amount before tax of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.","units":{"USD":[{"end":"2016-12-31","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q4I"},{"end":"2017-06-30","val":849000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"}]}},"AvailableForSaleSecuritiesAmortizedCost":{"label":"Available-for-sale Securities, Amortized Cost Basis","description":"This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.","units":{"USD":[{"end":"2011-12-31","val":58648000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-06-30","val":36191000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":23981000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":4830000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":4830000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":3019000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":2571000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-12-31","val":342000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-06-30","val":38995000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":43308000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":64917000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"}]}},"AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss":{"label":"Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss) before Taxes (Deprecated 2018-01-31)","description":"This item represents the pretax change in net unrealized holding gain (loss) on available-for-sale securities that has been included in accumulated other comprehensive income, a separate component of shareholders' equity, during the period.","units":{"USD":[{"start":"2012-01-01","end":"2012-06-30","val":160000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-09-30","val":278000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":247000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":6000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":4000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-09-30","val":8000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-12-31","val":4000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":9000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1"},{"start":"2017-01-01","end":"2017-06-30","val":849000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-09-30","val":3714000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-12-31","val":25146000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":-16011000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1"}]}},"AvailableForSaleSecuritiesDebtSecurities":{"label":"Debt Securities, Available-for-sale","description":"Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).","units":{"USD":[{"end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-12-31","val":58602000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":58602000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":58602000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":58602000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":58602000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":56406000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":36305000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":24213000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":4817000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":4817000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":4817000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":4817000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":4817000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":3012000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":2562000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":1531000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":333000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":333000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":333000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":333000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":333000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":19000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2016-12-31","val":4683000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":4683000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":4683000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-06-30","val":17534000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":17642000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":17751000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":17751000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":17751000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":17751000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":17751000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":17858000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":17879000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":17855000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":10859000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":10859000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":10859000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":10859000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":10859000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":0,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"}]}},"AvailableForSaleSecuritiesEquitySecurities":{"label":"Available-for-sale Securities, Equity Securities","description":"Amount of equity securities categorized neither as held-to-maturity nor as trading.","units":{"USD":[{"end":"2016-12-31","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-06-30","val":39844000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":47022000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":90063000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":90063000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":90063000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":90063000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":90063000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":89015000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":98627000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":98735000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":73876000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":73876000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":73876000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":73876000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":73876000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":60973000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":65267000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":79112000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":81439000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":81439000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q4I"},{"end":"2020-03-31","val":64024000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"}]}},"AvailableForSaleSecuritiesGrossRealizedGainLossNet":{"label":"Available-for-sale Securities, Gross Realized Gain (Loss)","description":"This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":214000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":214000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":35000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-7000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":-19010000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018"}]}},"AvailableForSaleSecuritiesGrossRealizedGains":{"label":"Available-for-sale Securities, Gross Realized Gains","description":"This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.","units":{"USD":[{"start":"2012-01-01","end":"2012-12-31","val":-14943000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012"}]}},"AvailableForSaleSecuritiesGrossUnrealizedGainLoss":{"label":"Available-for-sale Securities, Gross Unrealized Gain (Loss) (Deprecated 2013-01-31)","description":"The net amount of gross unrealized gains (losses) for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.","units":{"USD":[{"end":"2011-12-31","val":-46000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2011-12-31","val":-46000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":-46000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2012-06-30","val":114000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":232000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":-13000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2012-12-31","val":-13000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":-13000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":-13000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":-13000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2013-03-31","val":-7000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":-9000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":-5000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":-9000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"}]}},"BelowMarketLeaseAccumulatedAmortization":{"label":"Below Market Lease, Accumulated Amortization","description":"Amount of accumulated amortization of leases acquired as part of a real property acquisition at below market lease rate with a finite life.","units":{"USD":[{"end":"2016-12-31","val":4394000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":3160000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":3160000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q4I"},{"end":"2017-03-31","val":5072000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":4516000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":2264000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":793000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":793000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":793000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":941000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":1287000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":1668000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":1648000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":1471000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":1471000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q4I"},{"end":"2019-03-31","val":1867000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":2010000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":2400000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":1778000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":1778000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":1778000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":1778000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":1899000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":1624000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":1618000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":2270000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":2270000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":1882000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":1882000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":2270000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":2240000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":2230000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":2282000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":2639000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":2639000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":2639000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":2892000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-12-31","val":945000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"}]}},"BelowMarketLeaseAmortizationIncomeAfterYearFive":{"label":"Below Market Lease, Amortization Income, after Year Five","description":"Amount of amortization income for lease with finite life acquired as part of real property acquisition at below market lease rate expected to be recognized after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2014-12-31","val":227000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-12-31","val":118000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-12-31","val":62000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-12-31","val":350000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-12-31","val":1008000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"},{"end":"2019-12-31","val":424000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-12-31","val":209000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-12-31","val":72000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":73000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"}]}},"BelowMarketLeaseAmortizationIncomeNextTwelveMonths":{"label":"Below Market Lease, Amortization Income, Year One","description":"Amount of amortization income for lease with finite life acquired as part of real property acquisition at below market lease rate expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2014-12-31","val":1662000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-12-31","val":1115000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-12-31","val":3501000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-12-31","val":846000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-12-31","val":1315000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"},{"end":"2019-12-31","val":866000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-12-31","val":1856000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-12-31","val":1381000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":1029000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"}]}},"BelowMarketLeaseAmortizationIncomeYearFive":{"label":"Below Market Lease, Amortization Income, Year Five","description":"Amount of amortization income for lease with finite life acquired as part of real property acquisition at below market lease rate expected to be recognized in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2014-12-31","val":159000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-12-31","val":110000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-12-31","val":178000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-12-31","val":161000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-12-31","val":510000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"},{"end":"2019-12-31","val":407000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-12-31","val":662000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-12-31","val":139000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":139000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"}]}},"BelowMarketLeaseAmortizationIncomeYearFour":{"label":"Below Market Lease, Amortization Income, Year Four","description":"Amount of amortization income for lease with finite life acquired as part of real property acquisition at below market lease rate expected to be recognized in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2014-12-31","val":488000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-12-31","val":159000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-12-31","val":501000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-12-31","val":218000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-12-31","val":548000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"},{"end":"2019-12-31","val":416000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-12-31","val":974000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-12-31","val":552000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":552000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"}]}},"BelowMarketLeaseAmortizationIncomeYearThree":{"label":"Below Market Lease, Amortization Income, Year Three","description":"Amount of amortization income for lease with finite life acquired as part of real property acquisition at below market lease rate expected to be recognized in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2014-12-31","val":745000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-12-31","val":488000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-12-31","val":751000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-12-31","val":556000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-12-31","val":611000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"},{"end":"2019-12-31","val":507000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-12-31","val":1241000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-12-31","val":835000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":835000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"}]}},"BelowMarketLeaseAmortizationIncomeYearTwo":{"label":"Below Market Lease, Amortization Income, Year Two","description":"Amount of amortization income for lease with finite life acquired as part of real property acquisition at below market lease rate expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2014-12-31","val":1122000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-12-31","val":745000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-12-31","val":1558000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-12-31","val":712000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-12-31","val":1013000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"},{"end":"2019-12-31","val":560000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-12-31","val":1520000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-12-31","val":1101000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":1102000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"}]}},"BelowMarketLeaseGross":{"label":"Below Market Lease, Gross","description":"Amount before amortization of leases acquired as part of a real property acquisition at below market lease rate with a finite life.","units":{"USD":[{"end":"2016-12-31","val":10945000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":9189000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":9189000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q4I"},{"end":"2017-03-31","val":11605000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":9430000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":6015000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":3636000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":3636000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":3636000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":5320000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":7298000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":7222000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":6653000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":6418000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":6418000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q4I"},{"end":"2019-03-31","val":6519000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":6990000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":6959000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":4958000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":4958000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":4958000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":4958000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":4810000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":4322000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":4122000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":8732000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":8732000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":7679000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":7679000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":8732000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":8142000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":7048000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":6718000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":6719000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":6719000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":6719000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":6622000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-12-31","val":3534000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"}]}},"BelowMarketLeaseNet":{"label":"Below Market Lease, Net","description":"Amount after amortization of leases acquired as part of a real property acquisition at below market lease rate with a finite life.","units":{"USD":[{"end":"2014-12-31","val":4403000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-12-31","val":2735000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-12-31","val":6551000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":6551000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":6029000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":6029000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q4I"},{"end":"2017-03-31","val":6533000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":4914000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":3751000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":2843000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":2843000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":2843000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":2843000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":4379000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":6011000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":5554000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":5005000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":5005000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":4947000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":4947000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q4I"},{"end":"2019-03-31","val":4652000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":4980000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":4559000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":3180000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":3180000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":3180000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":3180000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":3180000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":2911000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":2698000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":2504000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":6462000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":6462000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":5797000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":5797000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":6462000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":5902000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":4818000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":4436000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":4080000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":4080000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":4080000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":3730000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-12-31","val":2589000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"}]}},"BusinessAcquisitionPurchasePriceAllocationAssetsAcquiredLiabilitiesAssumedNet":{"label":"Business Acquisition, Purchase Price Allocation, Assets Acquired (Liabilities Assumed), Net (Deprecated 2013-01-31)","description":"The total purchase price of the acquired entity. This includes cash paid to equity interest holders of the acquired entity, fair value of debt and equity securities issued to equity holders of the acquired entity, and transaction costs paid to third parties to consummate the acquisition.","units":{"USD":[{"end":"2012-09-30","val":95545000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":211655000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"},{"end":"2013-12-31","val":274940000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"}]}},"BusinessAcquisitionPurchasePriceAllocationLand":{"label":"Business Acquisition, Purchase Price Allocation, Land (Deprecated 2013-01-31)","description":"Amount of acquisition cost of a business combination allocated to land included in real estate.","units":{"USD":[{"end":"2012-09-30","val":29767000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":49602000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"},{"end":"2013-12-31","val":38671000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"}]}},"BusinessAcquisitionsProFormaNetIncomeLoss":{"label":"Business Acquisition, Pro Forma Net Income (Loss)","description":"The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.","units":{"USD":[{"start":"2015-01-01","end":"2015-09-30","val":8221000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":-119000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":7764000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015"},{"start":"2016-01-01","end":"2016-09-30","val":-18101000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":-12990000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":-25298000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016"},{"start":"2019-01-01","end":"2019-12-31","val":-13830000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":-46247000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":-70737000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020"}]}},"BusinessAcquisitionsProFormaRevenue":{"label":"Business Acquisition, Pro Forma Revenue","description":"The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.","units":{"USD":[{"start":"2015-01-01","end":"2015-09-30","val":101632000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":33779000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":134612000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015"},{"start":"2016-01-01","end":"2016-09-30","val":108795000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":36478000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":144674000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016"},{"start":"2019-01-01","end":"2019-12-31","val":102540000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":147769000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":153198000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020"}]}},"BusinessCombinationAcquisitionRelatedCosts":{"label":"Business Combination, Acquisition Related Costs","description":"This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":51000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-09-30","val":268000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":268000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":1139000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":1139000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":388000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":384000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":371000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":371000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":1345000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":1352000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":1352000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":273000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":273000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":487000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":487000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":214000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":214000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":834000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":834000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":348000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":348000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":1218000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":1218000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":1218000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":2176000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":2176000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":2180000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":2180000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":4000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":4000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":2178000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":2178000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":2177000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":2177000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":2177000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-06-30","val":268000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":268000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":268000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":268000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":542000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":542000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":274000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":274000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":543000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":543000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":543000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018"}]}},"BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual":{"label":"Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual","description":"This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.","units":{"USD":[{"start":"2012-01-01","end":"2012-09-30","val":1100000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":1100000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":4300000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":100000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":3100000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-09-30","val":10600000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-12-31","val":18500000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":3600000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":8300000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":12800000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-12-31","val":17700000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014"}]}},"BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles":{"label":"Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles","description":"The amount of identifiable intangible assets recognized as of the acquisition date.","units":{"USD":[{"end":"2014-03-31","val":4547000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":4547000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":4547000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":4547000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"}]}},"BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand":{"label":"Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Land","description":"Amount of real estate acquired, at the acquisition date.","units":{"USD":[{"end":"2014-03-31","val":61900000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":61900000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":61900000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":61900000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"}]}},"BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt":{"label":"Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt","description":"Amount of long-term debt due after one year or the normal operating cycle, if longer, assumed at the acquisition date.","units":{"USD":[{"end":"2020-09-30","val":36003000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2020-09-30","val":36003000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3I"},{"end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"}]}},"BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther":{"label":"Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other","description":"Amount of other liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date.","units":{"USD":[{"end":"2020-09-30","val":355000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2020-09-30","val":355000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3I"},{"end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"}]}},"BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets":{"label":"Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets","description":"Amount of other assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.","units":{"USD":[{"end":"2020-09-30","val":21000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2020-09-30","val":21000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3I"},{"end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"}]}},"BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest":{"label":"Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest","description":"Amount recognized as of the acquisition date for the assets, including goodwill, in excess of (less than) the aggregate liabilities assumed, less the noncontrolling interest in the acquiree.","units":{"USD":[{"end":"2013-06-30","val":159028000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":243988000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2014-03-31","val":222228000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":222228000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":222228000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":222228000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"}]}},"BusinessCombinationSeparatelyRecognizedTransactionsAdditionalDisclosuresAcquisitionCostExpensed":{"label":"Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed","description":"For transactions that are recognized separately from the acquisition of assets and assumptions of liabilities in the business combination, such as related to pre-existing relationships with the acquiree, this element represents the disclosure of the amount of acquisition related costs which have been expensed.","units":{"USD":[{"start":"2012-01-01","end":"2012-09-30","val":1300000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":3600000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":1000000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":2100000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-09-30","val":3300000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-12-31","val":4000000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":4400000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":4400000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":4400000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-12-31","val":4400000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014"}]}},"BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss":{"label":"Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (Loss), Net","description":"In a business combination achieved in stages, this element represents the amount of net gain (loss) recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination.","units":{"USD":[{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-09-30","val":2009000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":2009000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":2009000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":2009000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":2009000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022"}]}},"CapitalExpendituresIncurredButNotYetPaid":{"label":"Capital Expenditures Incurred but Not yet Paid","description":"Future cash outflow to pay for purchases of fixed assets that have occurred.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":117000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-09-30","val":117000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":30000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":18000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-09-30","val":370000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-12-31","val":921000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":112000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1"}]}},"CashAndCashEquivalentsAtCarryingValue":{"label":"Cash and Cash Equivalents, at Carrying Value","description":"Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.","units":{"USD":[{"end":"2008-12-31","val":200000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2008Q4I"},{"end":"2009-12-31","val":193000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2009-12-31","val":193000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2009-12-31","val":193000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2009-12-31","val":193000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2009Q4I"},{"end":"2010-06-30","val":12850000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2010Q2I"},{"end":"2010-09-30","val":11076000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2010Q3I"},{"end":"2010-12-31","val":23642000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":23642000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":23642000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2010-12-31","val":23642000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2010-12-31","val":23642000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2010-12-31","val":23642000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2010-12-31","val":23642000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2010-12-31","val":23642000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2010Q4I"},{"end":"2011-03-31","val":18508000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1I"},{"end":"2011-06-30","val":56450000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2011-06-30","val":56450000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2I"},{"end":"2011-09-30","val":85484000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2011-09-30","val":85484000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3I"},{"end":"2011-12-31","val":86379000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":86379000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":86379000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":86379000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":86379000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2011-12-31","val":86379000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2011-12-31","val":86379000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2011-12-31","val":86379000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2011-12-31","val":86379000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2011-12-31","val":86379000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2011Q4I"},{"end":"2012-03-31","val":86168000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2012-03-31","val":86168000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1I"},{"end":"2012-06-30","val":136085000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2012-06-30","val":136085000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2I"},{"end":"2012-09-30","val":66185000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2012-09-30","val":66185000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":125960000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":125960000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":125960000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":125960000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":125960000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2012-12-31","val":125960000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2012-12-31","val":125960000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2012-12-31","val":125960000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2012-12-31","val":125960000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2012-12-31","val":125960000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2012Q4I"},{"end":"2013-03-31","val":75793000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2013-03-31","val":75793000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1I"},{"end":"2013-06-30","val":92748000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2013-06-30","val":92748000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2I"},{"end":"2013-09-30","val":66687000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2013-09-30","val":66687000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3I"},{"end":"2013-12-31","val":57996000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":57996000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":57996000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":57996000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":57996000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2013-12-31","val":57996000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2013-12-31","val":57996000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2013-12-31","val":57996000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2013-12-31","val":57996000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013Q4I"},{"end":"2014-03-31","val":54757000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2014-03-31","val":54757000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1I"},{"end":"2014-06-30","val":20965000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2014-06-30","val":20965000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2I"},{"end":"2014-09-30","val":19171000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2014-09-30","val":19171000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3I"},{"end":"2014-12-31","val":19093000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":19093000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":19093000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":19093000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":19093000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2014-12-31","val":19093000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2014-12-31","val":19093000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2014-12-31","val":19093000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2014Q4I"},{"end":"2015-03-31","val":44907000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2015-03-31","val":44907000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1I"},{"end":"2015-06-30","val":30087000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2015-06-30","val":30087000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2I"},{"end":"2015-09-30","val":25361000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2015-09-30","val":25361000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3I"},{"end":"2015-12-31","val":23058000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":23058000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":23058000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":23058000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":23058000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":273563000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":117310000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":41596000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":40432000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":40432000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":40432000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":40432000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":40432000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":55880000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":100511000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":97487000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":366512000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":366512000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":366512000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":366512000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":366512000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":148760000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":49867000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":93357000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":152385000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":152385000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":152385000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":152385000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":152385000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":142782000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":110166000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":103711000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":76492000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":76492000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":76492000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":76492000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":76492000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":89526000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":82210000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":77617000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":60335000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":60335000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":60335000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":60335000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":60335000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":96740000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":135233000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":138037000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":84172000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":84172000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":84172000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":84172000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":84172000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2021-12-31","val":84172000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021Q4I"},{"end":"2022-03-31","val":59304000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":104389000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":85368000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":97931000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":97931000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":97931000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":97931000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":97931000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2022-12-31","val":97931000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022Q4I"},{"end":"2023-03-31","val":123784000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":69521000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":77794000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":99160000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":99160000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":99160000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":99160000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":99160000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":19820000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":40467000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":18902000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":56000000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":56000000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":56000000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":56000000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":23035000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":14682000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":19991000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"CashAndCashEquivalentsPeriodIncreaseDecrease":{"label":"Cash and Cash Equivalents, Period Increase (Decrease)","description":"Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":-7000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":12657000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-09-30","val":10883000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":23449000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":23449000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-5134000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":32808000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":32808000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":61842000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":61842000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":62737000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":62737000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":62737000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-211000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":-211000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":49706000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":49706000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":-20194000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":-20194000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":39581000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":39581000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":39581000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":-50167000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":-50167000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-33212000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":-33212000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":-59273000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":-59273000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":-67964000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":-67964000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":-67964000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-3239000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-3239000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-37031000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":-37031000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":-38825000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":-38825000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":-38903000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":-38903000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":25814000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":25814000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":10994000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":10994000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":6268000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":6268000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":3965000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":250505000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":94252000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-09-30","val":18538000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"}]}},"CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents":{"label":"Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents","description":"Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.","units":{"USD":[{"end":"2014-12-31","val":21335000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2014Q4I"},{"end":"2015-12-31","val":28865000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2015-12-31","val":28865000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2015-12-31","val":28865000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2015-12-31","val":28865000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2015Q4I"},{"end":"2016-06-30","val":139073000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2I"},{"end":"2016-09-30","val":63032000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":64450000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":64450000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":64450000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2016-12-31","val":64450000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2016-12-31","val":64450000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2016-12-31","val":64450000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2016-12-31","val":64450000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2016-12-31","val":64450000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2016Q4I"},{"end":"2017-03-31","val":79228000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1I"},{"end":"2017-06-30","val":122008000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2017-06-30","val":122008000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2I"},{"end":"2017-09-30","val":113573000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2017-09-30","val":113573000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3I"},{"end":"2017-12-31","val":377182000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":377182000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":377182000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":377182000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":377182000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2017-12-31","val":377182000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2017-12-31","val":377182000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2017-12-31","val":377182000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2017-12-31","val":377182000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2017-12-31","val":377182000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2017Q4I"},{"end":"2018-03-31","val":160213000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2018-03-31","val":160213000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1I"},{"end":"2018-06-30","val":60875000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2018-06-30","val":60875000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2I"},{"end":"2018-09-30","val":105882000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2018-09-30","val":105882000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3I"},{"end":"2018-12-31","val":162727000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":162727000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":162727000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":162727000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":162727000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2018-12-31","val":162727000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2018-12-31","val":162727000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2018-12-31","val":162727000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2018-12-31","val":162727000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2018-12-31","val":162727000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2018Q4I"},{"end":"2019-03-31","val":152279000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2019-03-31","val":152279000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1I"},{"end":"2019-06-30","val":121052000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2019-06-30","val":121052000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2I"},{"end":"2019-09-30","val":114720000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2019-09-30","val":114720000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3I"},{"end":"2019-12-31","val":88494000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":88494000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":88494000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":88494000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":88494000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2019-12-31","val":88494000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2019-12-31","val":88494000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2019-12-31","val":88494000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2019-12-31","val":88494000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2019-12-31","val":88494000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2019Q4I"},{"end":"2020-03-31","val":100503000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2020-03-31","val":100503000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":94472000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2020-06-30","val":94472000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2I"},{"end":"2020-09-30","val":89338000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2020-09-30","val":89338000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3I"},{"end":"2020-12-31","val":74319000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":74319000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":74319000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":74319000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":74319000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2020-12-31","val":74319000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2020-12-31","val":74319000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2020-12-31","val":74319000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2020-12-31","val":74319000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2020-12-31","val":74319000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2020Q4I"},{"end":"2021-03-31","val":114111000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2021-03-31","val":114111000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":161018000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2021-06-30","val":161018000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2I"},{"end":"2021-09-30","val":166238000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2021-09-30","val":166238000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3I"},{"end":"2021-12-31","val":105431000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":105431000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":105431000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":105431000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":105431000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2021-12-31","val":105431000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2021-12-31","val":105431000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2021-12-31","val":105431000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2021-12-31","val":105431000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2021-12-31","val":105431000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2021Q4I"},{"end":"2022-03-31","val":97427000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2022-03-31","val":97427000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1I"},{"end":"2022-06-30","val":166795000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2022-06-30","val":166795000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2I"},{"end":"2022-09-30","val":142693000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2022-09-30","val":142693000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":159044000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":159044000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":159044000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":159044000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":159044000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2022-12-31","val":159044000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2022-12-31","val":159044000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2022-12-31","val":159044000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2022-12-31","val":159044000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022Q4I"},{"end":"2023-03-31","val":168411000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2023-03-31","val":168411000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1I"},{"end":"2023-06-30","val":115505000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2023-06-30","val":115505000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2I"},{"end":"2023-09-30","val":129557000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2023-09-30","val":129557000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":155209000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":155209000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":155209000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":155209000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":155209000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2023-12-31","val":155209000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2023-12-31","val":155209000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2023-12-31","val":155209000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2023Q4I"},{"end":"2024-03-31","val":47692000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2024-03-31","val":47692000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1I"},{"end":"2024-06-30","val":79481000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2024-06-30","val":79481000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2I"},{"end":"2024-09-30","val":44327000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2024-09-30","val":44327000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":98376000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":98376000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":98376000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":98376000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":62303000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":65316000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":71100000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect":{"label":"Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect","description":"Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.","units":{"USD":[{"start":"2015-01-01","end":"2015-12-31","val":7530000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-06-30","val":110208000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":34167000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":35585000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":35585000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":14778000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":57558000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":57558000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":49123000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":49123000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":312732000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":312732000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":312732000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":-216969000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":-216969000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-316307000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":-316307000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":-271300000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":-271300000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":-214455000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":-214455000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":-214455000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-10448000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":-10448000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-41675000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":-41675000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":-48007000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":-48007000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":-74233000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":-74233000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":-74233000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":12009000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":12009000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":5978000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":5978000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":844000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":844000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":-14175000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":-14175000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":-14175000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":39792000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":39792000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":86699000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":86699000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":91919000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":91919000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":31112000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":31112000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":31112000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-8004000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":-8004000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":61364000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":61364000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":37262000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":37262000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":53613000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":53613000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":53613000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":9367000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":9367000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-43539000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":-43539000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-01-01","end":"2023-09-30","val":-29487000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":-29487000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":-3835000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":-3835000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-107517000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":-107517000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":-75728000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":-75728000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":-110882000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":-110882000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-01-01","end":"2024-12-31","val":-56833000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":-36073000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":-33060000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":-27276000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"CommonStockDividendsPerShareDeclared":{"label":"Common Stock, Dividends, Per Share, Declared","description":"Aggregate dividends declared during the period for each share of common stock outstanding.","units":{"USD/shares":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":0.3,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q3"},{"start":"2011-12-01","end":"2011-12-02","val":0.3,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":0.3,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":0.3,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":0.3,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2011-10-01","end":"2011-12-31","val":0.3,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4"},{"start":"2012-01-01","end":"2012-03-31","val":0.023,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":0.023,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-03-31","val":0.023,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2012-01-01","end":"2012-03-31","val":0.023,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":0.048,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":0.048,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":0.025,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":0.025,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-04-01","end":"2012-06-30","val":0.025,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":0.025,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":0.4,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":0.4,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":0.352,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":0.352,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-07-01","end":"2012-09-30","val":0.352,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":0.352,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":0.4,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":0.4,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":0.4,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2012-10-01","end":"2012-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-10-01","end":"2012-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4"},{"start":"2013-01-01","end":"2013-03-31","val":0.062,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":0.062,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-03-31","val":0.062,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2013-01-01","end":"2013-03-31","val":0.062,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0.062,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":0.062,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":0.062,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":0.062,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":0.44,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":0.44,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":0.44,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2013-10-01","end":"2013-12-31","val":0.38,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-10-01","end":"2013-12-31","val":0.38,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4"},{"start":"2014-01-01","end":"2014-03-31","val":0.0493,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":0.049,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-03-31","val":0.049315,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2014-01-01","end":"2014-03-31","val":0.049,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":0.105411,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":0.105,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":0.056096,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":0.056,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-04-01","end":"2014-06-30","val":0.056,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":0.056,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":0.174,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":0.174,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":0.069,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":0.069,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-07-01","end":"2014-09-30","val":0.069,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":0.069,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":0.26,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":0.26,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":0.26,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2014-10-01","end":"2014-12-31","val":0.088,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-10-01","end":"2014-12-31","val":0.088,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4"},{"start":"2015-01-01","end":"2015-03-31","val":0.092466,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":0.092,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-03-31","val":0.092466,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2015-01-01","end":"2015-03-31","val":0.092,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0.186,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":0.185959,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":0.093,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":0.093,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-04-01","end":"2015-06-30","val":0.092466,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":0.093,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":0.28,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":0.28,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":0.095,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":0.095,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-07-01","end":"2015-09-30","val":0.095,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":0.095,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":0.38,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":0.38,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":0.38,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2015-10-01","end":"2015-12-31","val":0.095,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-10-01","end":"2015-12-31","val":0.095,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4"},{"start":"2016-01-01","end":"2016-03-31","val":0.093238,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":0.093,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-03-31","val":0.093238,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2016-01-01","end":"2016-03-31","val":0.093,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":0.186475,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":0.186475,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":0.093238,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":0.093,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-04-01","end":"2016-06-30","val":0.093238,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":0.093,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":0.28,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":0.280738,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":0.094,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":0.094,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-07-01","end":"2016-09-30","val":0.094262,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":0.094,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":0.38,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":0.38,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":0.38,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2016-10-01","end":"2016-12-31","val":0.095,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-10-01","end":"2016-12-31","val":0.095,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4"},{"start":"2017-01-01","end":"2017-03-31","val":0.092466,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":0.092,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-03-31","val":0.092466,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2017-01-01","end":"2017-03-31","val":0.092,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":0.185959,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":0.185959,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":0.093493,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":0.093,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-04-01","end":"2017-06-30","val":0.093493,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":0.093,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":0.280479,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":0.280479,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":0.094521,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":0.095,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-07-01","end":"2017-09-30","val":0.094521,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":0.095,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":3.89,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":3.89,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":3.89,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2017-01-01","end":"2017-12-31","val":3,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2017"},{"start":"2017-10-01","end":"2017-12-31","val":3.61,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-10-01","end":"2017-12-31","val":3.61,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4"},{"start":"2018-01-01","end":"2018-03-31","val":0.015975,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":0.016,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-03-31","val":0.015975,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2018-01-01","end":"2018-03-31","val":0.016,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0.03195,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":0.03195,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":0.015975,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":0.016,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-04-01","end":"2018-06-30","val":0.015975,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":0.016,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":0.047925,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":0.047925,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":0.015975,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":0.016,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-07-01","end":"2018-09-30","val":0.015975,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":0.016,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":2.998,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":3,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018"},{"start":"2018-10-01","end":"2018-12-31","val":2.95,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-10-01","end":"2018-12-31","val":2.95,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4"},{"start":"2019-01-01","end":"2019-03-31","val":0.0086,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":0.009,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-03-31","val":0.0086,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":0.0172,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":0.0172,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":0.0086,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":0.009,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-04-01","end":"2019-06-30","val":0.0086,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":0.0258,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":0.0258,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":0.0086,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":0.009,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-07-01","end":"2019-09-30","val":0.0086,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":0.03,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":0.03,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":0.03,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2019-10-01","end":"2019-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4"},{"start":"2020-01-01","end":"2020-03-31","val":0.0086,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":0.0086,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":0.0086,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-03-31","val":0.0086,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":0.0086,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":0.0086,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":0.0086,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":0.009,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":0.009,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":0.009,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":1.17,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":1.17,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022"}]}},"CommonStockParOrStatedValuePerShare":{"label":"Common Stock, Par or Stated Value Per Share","description":"Face amount or stated value per share of common stock.","units":{"USD/shares":[{"end":"2010-12-31","val":0.01,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":0.01,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":0.01,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":0.01,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":0.01,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":0.01,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":0.01,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":0.01,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":0.01,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":0.01,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":0.01,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":0.01,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":0.01,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":0.01,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":0.01,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":0.01,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":0.01,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":0.01,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":0.01,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":0.01,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":0.01,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":0.01,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":0.01,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":0.01,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":0.01,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":0.01,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":0.01,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":0.01,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":0.01,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":0.01,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":0.01,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":0.01,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":0.01,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":0.01,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":0.01,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":0.01,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":0.01,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0.01,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":0.01,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":0.01,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":0.01,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":0.01,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":0.01,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":0.01,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":0.01,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":0.01,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":0.01,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":0.01,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":0.01,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":0.01,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":0.01,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":0.01,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":0.01,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":0.01,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":0.01,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":0.01,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":0.01,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":0.01,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":0.01,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":0.01,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":0.01,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":0.01,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":0.01,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":0.01,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":0.01,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":0.01,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":0.01,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":0.01,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":0.01,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":0.01,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":0.01,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":0.01,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":0.01,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":0.01,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-02-19","val":0.01,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2020-02-19","val":0.01,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2020-03-31","val":0.01,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":0.01,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":0.01,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":0.01,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":0.01,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":0.01,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":0.01,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":0.01,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":0.01,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":0.01,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":0.01,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":0.01,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":0.01,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":0.01,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":0.01,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":0.01,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":0.01,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":0.01,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":0.01,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":0.01,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":0.01,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":0.01,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":0.01,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":0.01,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":0.01,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":0.01,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":0.01,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":0.01,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":0.01,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":0.01,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":0.01,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":0.01,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":0.01,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":0.01,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":0.01,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":0.01,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":0.01,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":0.01,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":0.01,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":0.01,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":0.01,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":0.01,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"CommonStockSharesAuthorized":{"label":"Common Stock, Shares Authorized","description":"The maximum number of common shares permitted to be issued by an entity's charter and bylaws.","units":{"shares":[{"end":"2010-12-31","val":1000000000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":1000000000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":1000000000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":1000000000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":1000000000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":1000000000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":1000000000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":1000000000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":1000000000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":1000000000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":1000000000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":1000000000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":1000000000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":1000000000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":1000000000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":1000000000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":1000000000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":1000000000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":1000000000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":1000000000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":1000000000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":1000000000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":1000000000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":1000000000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":1000000000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":1000000000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":1000000000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":1000000000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":1000000000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":1000000000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":1000000000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":1000000000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":1000000000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":1000000000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":1000000000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":1000000000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":1000000000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":1000000000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":1000000000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":1000000000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":1000000000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":1000000000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":1000000000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":1000000000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":1000000000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":1000000000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":1000000000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":1000000000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":1000000000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":1000000000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":1000000000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":1000000000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":1000000000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":1000000000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":1000000000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":1000000000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":1000000000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":1000000000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":1000000000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":1000000000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":1000000000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":1000000000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":1000000000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":1000000000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":1000000000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":1000000000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":1000000000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":1000000000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":1000000000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":1000000000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":1000000000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":1000000000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":1000000000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":1000000000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":1000000000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":1000000000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":1000000000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":1000000000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":1000000000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":1000000000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":1000000000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":1000000000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":1000000000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":1000000000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":1000000000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":1000000000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":1000000000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":1000000000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":1000000000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":1000000000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":1000000000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":1000000000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":1000000000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":1000000000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":1000000000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":1000000000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":1000000000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":1000000000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":1000000000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":1000000000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":1000000000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":1000000000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":1000000000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":1000000000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":1000000000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":1000000000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":1000000000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":1000000000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":1000000000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":1000000000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":1000000000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":1000000000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":1000000000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":1000000000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":1000000000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":1000000000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"CommonStockSharesIssued":{"label":"Common Stock, Shares, Issued","description":"Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.","units":{"shares":[{"end":"2010-12-31","val":5132988,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":5132988,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":5132988,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":11243063,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":14915195,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-29","val":220994,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-29","val":220994,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-29","val":220994,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2011-12-29","val":220994,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2011-12-29","val":220994,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2011-12-29","val":220994,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2011-12-29","val":220994,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2011-12-29","val":220994,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2011-12-29","val":220994,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2011-12-29","val":220994,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2011-12-29","val":220994,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2011-12-29","val":220994,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2011-12-29","val":220994,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2011-12-29","val":220994,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2011-12-29","val":220994,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2011-12-29","val":220994,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2011-12-29","val":220994,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2011-12-29","val":220994,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2011-12-29","val":220994,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2011-12-29","val":220994,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2011-12-29","val":220994,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2011-12-29","val":220994,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2011-12-29","val":220994,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2011-12-29","val":220994,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2011-12-29","val":220994,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2011-12-29","val":220994,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2011-12-29","val":220994,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2011-12-29","val":220994,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2011-12-29","val":220994,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2011-12-29","val":220994,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2011-12-29","val":220994,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2011-12-29","val":220994,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2011-12-29","val":220994,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2011-12-29","val":220994,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2011-12-29","val":220994,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2011-12-29","val":220994,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2011-12-29","val":220994,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2011-12-29","val":220994,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2011-12-29","val":220994,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2011-12-29","val":220994,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2011-12-31","val":22214815,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":22214815,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":22214815,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":22214815,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":22214815,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":26301087,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":31956213,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":40845175,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-10-23","val":55249,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-10-23","val":55249,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-10-23","val":55249000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-10-23","val":55249000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-10-23","val":55249,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2012-10-23","val":55249,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2012-10-23","val":55249,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2012-10-23","val":55249,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2012-10-23","val":55249,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2012-10-23","val":55249,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2012-10-23","val":55249,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2012-10-23","val":55249,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2012-10-23","val":55249,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2012-10-23","val":55249,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2012-10-23","val":55249,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2012-10-23","val":55249,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2012-10-23","val":55249,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2012-10-23","val":55249,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2012-10-23","val":55249,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2012-10-23","val":55249,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2012-10-23","val":55249,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2012-10-23","val":55249,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2012-10-23","val":55249,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2012-10-23","val":55249,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2012-10-23","val":55249,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2012-10-23","val":55249,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2012-10-23","val":55249,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2012-10-23","val":55249,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2012-10-23","val":55249,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2012-10-23","val":55249,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2012-10-23","val":55249,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2012-10-23","val":55249,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2012-10-23","val":55249,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2012-10-23","val":55249,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2012-10-23","val":55249,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2012-10-23","val":55249,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2012-10-23","val":55249,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2012-10-23","val":55249,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2012-12-31","val":58127627,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":58127627,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":58127627,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":58127627,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":58127627,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":58117219,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":58339185,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":58294420,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":59619000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":59619000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":59619000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":59619000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":59619000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":59553656,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":59751364,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":59903681,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":60044329,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":60044329,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":60044329,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":60044329,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":60044329,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":60243679,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":60202179,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":58943382,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":58696115,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":58696115,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":58696115,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":58696115,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":58696115,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":58678256,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":58644697,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":57050299,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":56775767,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":56775767,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":56775767,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":56775767,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":56775767,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":56708525,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":56639546,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":56795632,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":52053817,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":52053817,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":52053817,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":52053817,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":52053817,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":64745413,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":54682660,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":54231264,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":66822861,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":66822861,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":66822861,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":66822861,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":66822861,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":66584729,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":66342855,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":66124718,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":65866765,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":65866765,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":65866765,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":65866765,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":65866765,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":69259122,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":69225617,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":69225016,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":98054582,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":98054582,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":98054582,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":98054582,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":98054582,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":97966439,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":97906268,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":94264402,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":94141251,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":94141251,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":94141251,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":94141251,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":94141251,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":104496165,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":104319092,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":104076881,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":103932083,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":103932083,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":103932083,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":103932083,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":103932083,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":103788298,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":103626096,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":103439698,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":103310648,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":103310648,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":103310648,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":103310648,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":103310648,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":103214807,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":103016968,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":102951395,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":102951395,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":102951395,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":102951395,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":102951395,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":102951395,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":102951395,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":102951395,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"CommonStockSharesOutstanding":{"label":"Common Stock, Shares, Outstanding","description":"Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.","units":{"shares":[{"end":"2010-12-31","val":5132988,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":5132988,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":5132988,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":11243063,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":14915195,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":22214815,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":22214815,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":22214815,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":22214815,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":22214815,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":26301087,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":31956213,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":40845175,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":58127627,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":58127627,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":58127627,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":58127627,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":58127627,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":58117219,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":58339185,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":58294420,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":59619000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":59619000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":59619000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":59619000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":59619000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":59553656,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":59751364,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":59903681,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":60044329,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":60044329,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":60044329,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":60044329,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":60044329,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":60243679,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":60202179,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":58943382,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":58696115,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":58696115,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":58696115,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":58696115,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":58696115,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":58678256,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":58644697,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":57050299,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":56775767,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":56775767,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":56775767,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":56775767,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":56775767,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":56708525,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":56639546,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":56795632,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":52053817,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":52053817,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":52053817,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":52053817,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":52053817,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":64745413,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":54682660,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":54231264,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":66822861,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":66822861,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":66822861,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":66822861,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":66822861,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":66584729,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":66342855,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":66124718,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":65866765,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":65866765,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":65866765,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":65866765,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":65866765,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":69259122,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":69225617,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":69225016,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":98054582,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":98054582,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":98054582,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":98054582,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":98054582,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":97966439,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":97906268,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":94264402,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":94141251,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":94141251,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":94141251,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":94141251,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":94141251,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":104496165,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":104319092,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":104076881,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":103932083,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":103932083,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":103932083,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":103932083,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":103932083,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":103788298,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":103626096,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":103439698,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":103310648,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":103310648,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":103310648,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":103310648,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":103310648,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":103214807,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":103016968,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":102951395,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":102951395,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":102951395,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":102951395,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":102951395,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":102951395,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":102951395,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":102951395,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"CommonStockValue":{"label":"Common Stock, Value, Issued","description":"Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.","units":{"USD":[{"end":"2010-12-31","val":52000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":52000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":52000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":113000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":149000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2011-12-29","val":2000000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2011-12-31","val":222000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":222000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":222000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":222000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":222000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":263000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":320000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":408000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-10-23","val":500000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-10-23","val":500000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-10-23","val":500000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-10-23","val":500000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-10-23","val":500000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2012-10-23","val":500000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2012-10-23","val":500000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2012-10-23","val":500000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2012-10-23","val":500000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2012-10-23","val":500000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2012-10-23","val":500000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2012-10-23","val":500000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2012-10-23","val":500000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2012-10-23","val":500000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2012-10-23","val":500000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2012-10-23","val":500000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2012-10-23","val":500000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2012-10-23","val":500000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2012-10-23","val":500000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2012-10-23","val":500000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2012-10-23","val":500000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2012-10-23","val":500000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2012-10-23","val":500000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2012-10-23","val":500000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2012-10-23","val":500000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2012-10-23","val":500000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2012-10-23","val":500000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2012-10-23","val":500000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2012-10-23","val":500000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2012-10-23","val":500000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2012-10-23","val":500000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2012-10-23","val":500000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2012-10-23","val":500000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2012-10-23","val":500000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2012-10-23","val":500000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2012-10-23","val":500000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2012-10-23","val":500000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2012-10-23","val":500000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2012-12-31","val":581000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":581000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":581000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":581000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":581000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":581000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":583000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":583000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":596000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":596000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":596000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":596000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":596000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":595000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":597000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":599000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":600000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":600000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":600000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":600000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":600000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":602000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":602000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":589000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":587000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":587000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":587000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":587000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":587000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":587000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":586000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":571000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":568000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":568000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":568000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":568000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":568000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":567000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":566000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":568000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":521000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":521000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":521000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":521000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":521000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":647000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":547000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":542000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":668000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":668000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":668000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":668000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":668000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":666000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":663000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":661000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":659000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":659000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":659000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":659000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":659000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":693000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":693000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":693000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":979000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":979000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":979000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":979000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":979000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":979000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":979000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":942000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":941000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":941000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":941000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":941000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":941000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":1045000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":1043000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":1041000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":1039000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":1039000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":1039000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":1039000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":1039000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":1038000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":1036000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":1034000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":1033000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":1033000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":1033000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":1033000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":1033000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":1032000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":1030000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":1030000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":1030000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":1030000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":1030000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":1030000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":1030000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":1030000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":1030000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"ComprehensiveIncomeNetOfTax":{"label":"Comprehensive Income (Loss), Net of Tax, Attributable to Parent","description":"Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":-1975000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-703000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-2380000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":-1677000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":-4223000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":-1844000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":-7627000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":-7627000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-441000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":-441000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-3332000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":-3332000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":-2891000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":-2891000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":-6713000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":-6713000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-3381000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-3381000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":-9729000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":-9729000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":-9729000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":1417000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":1417000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-927000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":-927000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":-2345000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":-2345000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":6422000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":6422000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":7348000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":7348000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":11497000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":11497000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":11497000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-9608000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-9608000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-14939000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":-14939000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":-5331000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":-5331000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":-18306000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":-18306000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":-3367000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":-3367000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-23185000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":-23185000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":-23185000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":2235000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":3761000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":1526000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":3299000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":-462000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":2444000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":2444000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":2444000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-06-30","val":-6853000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":-1959000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":-21804000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":-14951000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":-28918000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":-28918000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":-28918000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-06-30","val":15603000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":15603000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":24695000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":24695000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":7934000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":7934000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":-7669000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":-7669000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":235790000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":235790000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":235790000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-06-30","val":-13645000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":10036000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":22852000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":36497000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":33546000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":33546000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":-17282000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019"}]}},"ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest":{"label":"Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest","description":"Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":-103000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":-103000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":-218000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":-218000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":78000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":78000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-21000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":-21000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":-99000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":-99000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":-182000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":-182000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-161000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-161000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":-333000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":-333000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":-333000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":330000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":330000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":244000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":244000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":-86000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":-86000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":160000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":160000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":-84000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":-84000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":96000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":96000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":96000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-277000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-277000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-426000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":-426000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":-149000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":-149000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":-486000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":-486000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":-59000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":-59000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-554000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":-554000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":-554000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":3150000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":4263000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":1113000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":4448000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":185000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":4688000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":4688000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":4688000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-06-30","val":-68000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":-30000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":-124000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":-56000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":-208000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":-208000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":-208000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-06-30","val":-3000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":-3000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":-37000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":-37000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":-10000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":-10000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":-8000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":-8000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":-64000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":-64000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":-64000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-06-30","val":-64000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":-43000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":-141000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":-76000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":-222000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":-222000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":2101000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019"}]}},"ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest":{"label":"Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest","description":"Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":-1975000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-703000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-2380000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":-1677000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":-4326000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":-1947000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":-7845000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":-7845000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":-7845000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-363000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":-363000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-3353000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":-3353000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":-2990000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":-2990000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":-6895000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":-6895000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-3542000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-3542000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":-10062000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":-10062000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":-10062000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":1747000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":1747000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-683000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":-683000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":-2431000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":-2431000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":6582000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":6582000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":7264000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":7264000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":11593000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":11593000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":11593000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-9885000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-9885000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-15365000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":-15365000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":-5480000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":-5480000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":-18792000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":-18792000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":-3426000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":-3426000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-23739000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":-23739000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":-23739000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":5385000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":8024000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":2639000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":7747000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":-277000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":7132000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":7132000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":7132000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-06-30","val":-6921000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":-1989000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":-21928000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":-15007000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":-29126000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":-29126000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":-29126000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-06-30","val":15600000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":15600000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":24658000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":24658000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":7924000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":7924000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":-7677000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":-7677000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":235726000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":235726000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":235726000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-06-30","val":-13709000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":9993000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":22711000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":36421000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":33324000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":33324000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":-15181000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019"}]}},"ConcentrationRiskPercentage1":{"label":"Concentration Risk, Percentage","description":"\"For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the \"\"benchmark\"\" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.\"","units":{"pure":[{"start":"2012-01-01","end":"2012-06-30","val":0.624,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-09-30","val":0.574,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":0.359,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0.363,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0.349,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-12-31","val":0.321,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0.251,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":0.378,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":0.379,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-12-31","val":0.476,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0.387,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0.389,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-09-30","val":0.38,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-12-31","val":0.377,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0.367,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":0.24,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-09-30","val":0.217,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":0.315,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":0.411,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":0.216,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-09-30","val":0.212,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2018-01-01","end":"2018-12-31","val":0.229,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":0.24,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":0.241,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-09-30","val":0.242,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-12-31","val":0.392,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":0.358,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":0.363,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-09-30","val":0.343,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-12-31","val":0.208,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":0.235,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1"}]}},"ContractWithCustomerLiability":{"label":"Contract with Customer, Liability","description":"Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.","units":{"USD":[{"end":"2017-12-31","val":2000000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":2000000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":3100000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q4I"},{"end":"2018-01-01","val":1700000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-03-31","val":1700000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":1700000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":1700000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":3100000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":3100000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-12-31","val":3100000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2023-12-31","val":23800000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q4I"},{"end":"2024-09-30","val":17200000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"}]}},"ContractWithCustomerLiabilityRevenueRecognized":{"label":"Contract with Customer, Liability, Revenue Recognized","description":"Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.","units":{"USD":[{"start":"2017-01-01","end":"2017-09-30","val":1678000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":2416000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":745000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":1670000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":3508000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":3508000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":4736000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":4736000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":1270000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":1270000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":2230000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":2230000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":3213000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":3213000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":4078000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":4078000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":4078000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":1027000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":1027000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":1657000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":1657000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":2559000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":2559000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":3447000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":3447000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":3447000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":1085000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":1085000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":1113000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":1113000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":1529000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":1529000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":1890000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":1890000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":1890000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":1055000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":1055000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":1427000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":1427000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":1966000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":1966000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":2582000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":2582000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":2582000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":850000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":850000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":1508000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":1508000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-01-01","end":"2023-09-30","val":539000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":539000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":176000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":176000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":35000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":325000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-09-30","val":815000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":906000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-01-01","end":"2024-12-31","val":859000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-09-30","val":-1158000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"ConversionOfStockSharesIssued1":{"label":"Conversion of Stock, Shares Issued","description":"\"The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. \"\"Part noncash\"\" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.\"","units":{"shares":[{"end":"2020-10-05","val":28973905,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-10-05","val":28973905,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-10-05","val":28973905,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-10-05","val":28973905,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3I"}]}},"CostOfOtherPropertyOperatingExpense":{"label":"Cost of Other Property Operating Expense","description":"Other operating costs incurred during the reporting period and may include amounts paid to maintain the property.","units":{"USD":[{"start":"2017-01-01","end":"2017-12-31","val":42611000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":29110000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":29110000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":6271000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":13098000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":6826000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":21254000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":8156000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":29294000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":29294000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":29294000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":7572000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":7572000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":14370000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":14370000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":6799000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":6799000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":22258000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":22258000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":7888000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":7888000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":33882000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":33882000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":33882000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":10433000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":10433000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":20775000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":20775000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":10342000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":10342000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":31444000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":31444000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":10668000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":10668000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":42519000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":42519000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":42519000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":9875000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":9875000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":20218000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":20218000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":10342000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":10342000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":32560000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":32560000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":12342000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":12342000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":44317000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":44317000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":44317000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":11168000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":11168000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":22275000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":22275000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":11107000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":11107000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":34377000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":34377000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":12102000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":12102000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":45699000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":45699000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":10903000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":10903000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":22086000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":22086000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":11183000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":11183000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":33877000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":33877000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":11791000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":11791000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":45967000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":12020000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":23611000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":11591000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":34888000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":11277000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"CostOfRealEstateRevenue":{"label":"Cost of Real Estate Revenue (Deprecated 2018-01-31)","description":"This element represents the total of the costs related to real estate revenues, including management, leasing, and development services.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-04-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":34000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-07-01","end":"2010-09-30","val":34000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":217000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":217000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":108000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":565000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":565000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":458000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-04-01","end":"2011-06-30","val":458000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":1531000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":1531000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":966000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-07-01","end":"2011-09-30","val":966000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":2957000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":2877000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":2803000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":1499000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":1379000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":3103000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":2898000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":1603000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":1518000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":5481000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":5018000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":2379000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":2181000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":8210000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":7779000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":7779000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":3733000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":3451000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":8828000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":8242000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":5094000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":4791000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":15643000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":14942000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":6929000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":6700000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":22804000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":22804000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":22804000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":8715000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":8715000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":17293000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":17293000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":8578000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":8578000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":26285000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":26285000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":8992000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":8992000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":35957000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":35957000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":35957000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":8944000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":8944000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":17924000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":17924000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":8980000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":8980000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":27855000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":27855000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":9930000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":9930000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":37512000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":37512000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":37512000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":9520000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":9520000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":18823000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":18823000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":9303000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":9303000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":29755000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":29755000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":10932000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":10932000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":41906000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":41906000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":41906000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":10908000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":10908000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":22207000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":22207000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":11299000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":11299000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":33638000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":33638000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":11431000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":11431000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":42611000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":42611000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":5487000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":5487000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":13058000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":7571000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":21395000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":8336000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":29110000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":6271000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1"}]}},"CostsAndExpenses":{"label":"Costs and Expenses","description":"Total costs of sales and operating expenses for the period.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":7000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":610000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-04-01","end":"2010-06-30","val":607000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":1153000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-07-01","end":"2010-09-30","val":543000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":2301000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":2301000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":1056000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":3376000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":3376000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":2320000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-04-01","end":"2011-06-30","val":2320000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":6556000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":6556000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":3181000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-07-01","end":"2011-09-30","val":3181000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":12194000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":12042000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":11634000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":5443000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":5173000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":11627000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":11128000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":6184000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":5961000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":20463000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":19200000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":8836000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":8414000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":30949000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":29318000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":29318000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":13164000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":12280000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":30429000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":28837000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":17268000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":16556000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":53885000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":52162000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":23748000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":23327000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":76132000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":76132000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":76132000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":34342000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":34342000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":65716000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":65716000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":31373000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":31373000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":96565000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":96565000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":30848000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":30848000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":128860000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":128860000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":128860000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":30658000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":30658000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":61440000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":61440000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":30781000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":30781000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":93136000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":93136000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":31695000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":31695000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":123396000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":123396000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":123396000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":33106000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":33106000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":68820000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":68820000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":35714000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":35714000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":119176000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":119176000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":50356000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":50356000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":162006000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":162006000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":161986000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":48794000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":48794000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":97799000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":97799000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":49005000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":49005000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":145182000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":145006000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":47383000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":47381000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":182732000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":182577000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":182577000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":26556000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":26556000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":48779000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":48779000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":22223000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":22223000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":82597000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":82775000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":33569000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":33995000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":115600000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":115600000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":116036000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":30337000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":30337000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":62530000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":62530000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":32193000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":32193000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":100036000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":100036000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":37507000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":37507000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":132890000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":132822000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":132822000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":16436000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":16436000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":47872000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":47872000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":31437000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":31437000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":80131000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":80131000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":32254000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":32254000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":148157000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":148157000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":148157000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":43429000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":43429000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":102687000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":102687000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":59256000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":59256000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":170923000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":170923000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":68237000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":68237000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":228747000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":228747000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":228747000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":40992000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":40992000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":70629000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":70629000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":29636000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":29636000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":139867000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":139867000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":69235000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":69235000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":206692000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":206692000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":206692000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":69543000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":69543000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":148503000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":148503000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":78962000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":78962000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":233576000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":233576000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":85071000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":85071000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":310967000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":310967000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":89475000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":89475000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":159458000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":159458000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":69982000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":69982000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":235662000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":235662000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":76204000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":76204000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":295674000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":44586000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":178972000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":134385000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":311831000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":132860000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption":{"label":"Cumulative Effect of New Accounting Principle in Period of Adoption (Deprecated 2020-01-31)","description":"Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.","units":{"USD":[{"end":"2017-12-31","val":2472000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":2472000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":2472000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":2472000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2017-12-31","val":2472000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2017-12-31","val":2472000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2017-12-31","val":2472000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2017-12-31","val":2472000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017Q4I"}]}},"DebtInstrumentCarryingAmount":{"label":"Long-term Debt, Gross","description":"Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.","units":{"USD":[{"end":"2013-06-30","val":177038000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":202080000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":255871000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"},{"end":"2014-03-31","val":475428000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":510266000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":520781000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":530238000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-03-31","val":555491000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":539928000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":551106000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":550796000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-03-31","val":832547000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":833406000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":948032000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":962930000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-03-31","val":1030499000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":1044803000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":1000188000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":611694000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":698831000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":776818000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":749750000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":663318000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"},{"end":"2019-03-31","val":595756000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":672962000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":668080000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":678080000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-03-31","val":704567000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":721946000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":763070000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":1106377000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-03-31","val":1133532000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":1129987000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":1030734000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":1015491000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":997638000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":1060304000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":1066736000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":1066112000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-03-31","val":1056819000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":993087000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":1052671000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":1045821000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-03-31","val":951420000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":1015688000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":943226000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":876767000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"},{"end":"2025-03-31","val":845991000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":874660000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":877037000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"DebtInstrumentFaceAmount":{"label":"Debt Instrument, Face Amount","description":"Face (par) amount of debt instrument at time of issuance.","units":{"USD":[{"end":"2012-12-31","val":33751000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":33751000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":33751000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-06-30","val":177038000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":202080000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":255871000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":255871000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":255871000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":255871000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":255871000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":475428000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":510266000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":520781000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":530238000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":530238000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":530238000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":530238000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":530238000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":555491000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":539928000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":551106000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":550796000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":550796000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":550796000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":550796000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":574240000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":582026000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-12-31","val":711119000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":711119000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":711119000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":711119000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":711119000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":762717000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":766658000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":725647000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":332893000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":332893000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":332893000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":332893000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":332893000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":421036000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":511533000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":482896000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":403802000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":403802000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":403802000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":403802000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":403802000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":382126000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":455544000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":444802000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":453334000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"}]}},"DebtInstrumentFairValue":{"label":"Debt Instrument, Fair Value Disclosure","description":"Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.","units":{"USD":[{"end":"2013-12-31","val":258876000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":258876000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":258876000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-06-30","val":512948000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":524085000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":534045000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":534045000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q4I"},{"end":"2015-06-30","val":542757000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"}]}},"DebtInstrumentInterestRateEffectivePercentage":{"label":"Debt Instrument, Interest Rate, Effective Percentage","description":"Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.","units":{"pure":[{"end":"2012-06-30","val":0.0149,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"}]}},"DebtInstrumentUnamortizedDiscountPremiumNet":{"label":"Debt Instrument, Unamortized Discount (Premium), Net","description":"Amount, after accumulated amortization, of debt discount (premium).","units":{"USD":[{"end":"2014-12-31","val":-25000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":-25000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":-25000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q4I"},{"end":"2015-03-31","val":-30000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":-36000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":-43000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":-50000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":-50000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":-50000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q4I"},{"end":"2016-03-31","val":-59000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":-68000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":-78000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2019-12-31","val":-783000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-12-31","val":2851000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":2851000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":2851000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":2851000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":2851000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":3806000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":2843000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":2249000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":8146000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":8146000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":8146000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":8146000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":8146000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":7130000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":9636000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":13376000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":11964000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":11964000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q4I"},{"end":"2023-03-31","val":10861000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-12-31","val":17138000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":17138000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":17138000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q4I"},{"end":"2024-03-31","val":16208000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":16246000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":16313000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"}]}},"DebtInstrumentUnamortizedPremium":{"label":"Debt Instrument, Unamortized Premium","description":"Amount, after accumulated amortization, of debt premium.","units":{"USD":[{"end":"2013-12-31","val":1549000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-12-31","val":25000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":25000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-12-31","val":50000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":50000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-12-31","val":88000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":88000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":88000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":88000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":88000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":99000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":111000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":124000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":137000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":137000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":137000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":137000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":137000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":151000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":167000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":182000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":198000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":198000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":198000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":198000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":198000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":862000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":835000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":808000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":783000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":783000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":783000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":783000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q4I"},{"end":"2020-03-31","val":757000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":732000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":175000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"}]}},"DebtInstrumentUnusedBorrowingCapacityAmount":{"label":"Debt Instrument, Unused Borrowing Capacity, Amount","description":"Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.","units":{"USD":[{"end":"2013-10-31","val":107600000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q3I"}]}},"DeferredFinanceCostsNet":{"label":"Debt Issuance Costs, Net","description":"Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.","units":{"USD":[{"end":"2014-12-31","val":6201000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-12-31","val":3523000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":3523000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":3523000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":3523000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":3523000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":12758000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":11702000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":11778000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":12394000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":12394000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":12394000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":12394000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":12394000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":12497000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":11684000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":10064000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":8788000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":8788000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":8788000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":8788000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":8788000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":9228000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":9769000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":8803000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":8044000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":8044000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":8044000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":8044000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":8044000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":7010000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":7264000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":6348000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":5200000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":5200000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":5200000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":5200000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":5200000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":6636000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":5975000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":5170000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":4458000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":4458000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":4458000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":4458000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":4458000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":4699000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":4988000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":4707000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":8396000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":8396000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":8396000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":8396000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":8396000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":8577000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":10639000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":10500000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":9439000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":9439000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q4I"},{"end":"2023-03-31","val":8587000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"}]}},"DeferredFinanceCostsNoncurrentNet":{"label":"Debt Issuance Costs, Noncurrent, Net","description":"Amount, after accumulated amortization, of debt issuance costs classified as noncurrent. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.","units":{"USD":[{"end":"2011-12-31","val":1100000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":1100000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":1000000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-06-30","val":1000000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":900000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":700000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":700000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":700000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":700000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":700000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":1300000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":3100000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":3900000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":5000000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":5000000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":5000000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":5000000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":5000000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":7200000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":6900000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":6300000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":6200000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":6100000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":6100000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":6100000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":6200000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":5500000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":4700000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":4400000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":4700000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":4700000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":4700000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":4700000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":4700000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":12800000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":11700000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":12200000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":12500000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":12500000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":12500000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":12500000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":12500000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":12500000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":11700000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":10100000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":8800000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"}]}},"DeferredRentReceivablesNet":{"label":"Deferred Rent Receivables, Net","description":"The cumulative difference between the rental payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense over the term of the leased property, by the lessor or lessee, respectively. Such receivable is reduced by allowances attributable to, for instance, credit risk associated with a lessee.","units":{"USD":[{"end":"2011-12-31","val":200000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":200000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":200000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-06-30","val":1200000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":1700000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":2400000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":2400000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":2400000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":2300000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":2200000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":3500000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":4800000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":6300000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":7800000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":7800000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":7800000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":7800000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":7800000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":10300000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":13100000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":15200000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":16800000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":16800000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":16800000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":16800000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":16800000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":18800000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":20200000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":21300000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":22800000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":22800000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":22800000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":22800000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":22800000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":23800000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":24600000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":25700000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":26800000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":26800000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":26100000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":26100000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":5500000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":27800000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":27800000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":27000000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":7700000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":7700000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":6600000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":6600000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":5000000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":8500000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":8600000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":10900000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":9800000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":9800000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":9600000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":9600000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":8400000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":11100000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":13900000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":14900000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":13600000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":13600000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":13600000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":13600000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":13600000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":14900000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":15500000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":16700000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":19200000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":19200000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":15500000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":15500000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":19200000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":20900000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":15500000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":15700000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":16300000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":16300000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":16300000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":16300000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":16300000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":16700000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":17000000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":17800000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":18300000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":18300000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":18300000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":18300000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":18300000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":19300000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":20200000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":19200000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":19100000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":19100000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":19100000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":19100000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":19100000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":19000000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":20100000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":20400000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":19700000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":19700000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":19700000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":12600000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":19500000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":18500000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":10800000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"DepreciationAndAmortizationDiscontinuedOperations":{"label":"Depreciation and Amortization, Discontinued Operations","description":"Amount of deprecation and amortization expense attributable to property, plant and equipment and intangible assets of discontinued operations.","units":{"USD":[{"start":"2012-01-01","end":"2012-06-30","val":37000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":267000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-03-31","val":467000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":729000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":169000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":997000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"}]}},"DepreciationDepletionAndAmortization":{"label":"Depreciation, Depletion and Amortization","description":"The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-04-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":72000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-07-01","end":"2010-09-30","val":72000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":212000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":212000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":193000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":796000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":796000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":603000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-04-01","end":"2011-06-30","val":603000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":1719000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":1719000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":924000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-07-01","end":"2011-09-30","val":924000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":3203000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":3196000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":2992000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":1749000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":1727000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":3411000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":3374000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":1662000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":1646000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":6350000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":6083000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":2939000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":2872000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":9463000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":8606000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":8606000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":4585000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":4118000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":10596000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":9867000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":6012000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":5749000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":19761000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":18933000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":9259000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":9066000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":28677000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":28677000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":28677000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":11731000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":11731000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":23614000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":23614000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":11883000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":11883000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":35509000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":35509000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":11895000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":11895000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":47063000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":47063000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":47063000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":11229000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":11229000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":22387000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":22387000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":11159000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":11159000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":33684000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":33684000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":11297000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":11297000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":44739000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":44739000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":44739000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":11008000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":11008000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":23099000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":23099000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":12091000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":12091000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":37436000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":37436000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":14337000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":14337000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":52051000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":52051000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":52051000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":14600000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":14600000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":29908000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":29908000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":15307000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":15307000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":43136000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":43136000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":13228000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":13228000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":53446000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":53446000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":53446000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":7265000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":7265000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":16307000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":16307000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":9042000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":9042000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":26133000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":26133000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":9826000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":9826000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":35006000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":35006000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":35006000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":7681000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":7681000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":16037000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":16037000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":8357000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":8357000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":25276000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":25276000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":9239000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":9239000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":34004000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":34004000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":34004000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":8984000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":8984000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":17947000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":17947000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":8964000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":8964000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":27417000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":27417000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":9470000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":9470000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":45041000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":45041000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":45041000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":17001000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":17001000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":32073000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":32073000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":15072000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":15072000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":45969000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":45969000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":13895000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":13895000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":58871000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":58871000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":58871000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":12565000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":12565000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":26662000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":26662000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":14098000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":14098000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":39379000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":39379000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":12717000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":12717000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":51930000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":51930000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":51930000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":12048000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":12048000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":24158000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":24158000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":12110000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":12110000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":36556000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":36556000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":12399000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":12399000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":47868000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":47868000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":10749000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":10749000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":21129000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":21129000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":10380000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":10380000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":31405000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":31405000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":10276000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":10276000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":41069000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":9683000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":20048000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":10366000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":27742000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":7694000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax":{"label":"Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax","description":"Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":545000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":545000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":595000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":595000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":50000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":50000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":593000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":593000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-2000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-2000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":593000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":593000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":4225000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":4225000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":4225000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":4225000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":4225000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":4225000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":13108000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":55000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":55000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-03-31","val":8311000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":8311000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":8287000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":8287000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":11195000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":11195000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"}]}},"DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax":{"label":"Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax","description":"Amount after tax of income (loss) from operations classified as a discontinued operation. Excludes gain (loss) on disposal and provision for gain (loss) until disposal.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":-49000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":-183000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-267000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-495000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":-222000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":-818000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-273000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":-1009000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":-1616000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":-1616000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":-320000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":-697000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-323000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":-944000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":-248000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":-400000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":-1187000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":-72000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":-242000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":-1367000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":-1367000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":-1367000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-13000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-13000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-33000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":-33000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":-20000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":-20000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":-18000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":-18000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":15000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":15000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-18000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":-18000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015"}]}},"DisposalGroupIncludingDiscontinuedOperationAccountsPayable":{"label":"Disposal Group, Including Discontinued Operation, Accounts Payable","description":"Amount classified as accounts payable attributable to disposal group held for sale or disposed of.","units":{"USD":[{"end":"2020-12-31","val":94097000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":94097000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":94097000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-06-30","val":98066000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":9070000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":9070000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":63876000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":63876000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":0,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":17559000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":748000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":1969000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":74374000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":78982000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":0,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":0,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":3141000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":1041000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":1171000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":40608000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":107258000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":400000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":39515000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":66670000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"DisposalGroupIncludingDiscontinuedOperationOtherAssets":{"label":"Disposal Group, Including Discontinued Operation, Other Assets","description":"Amount classified as other assets attributable to disposal group held for sale or disposed of.","units":{"USD":[{"end":"2020-12-31","val":5680000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q4I"},{"end":"2020-12-31","val":5680000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2021-06-30","val":6253000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"}]}},"DisposalGroupIncludingDiscontinuedOperationOtherLiabilities":{"label":"Disposal Group, Including Discontinued Operation, Other Liabilities","description":"Amount classified as other liabilities attributable to disposal group held for sale or disposed of.","units":{"USD":[{"end":"2020-12-31","val":669000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q4I"},{"end":"2020-12-31","val":669000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2021-06-30","val":612000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"}]}},"DisposalGroupIncludingDiscontinuedOperationRevenue":{"label":"Disposal Group, Including Discontinued Operation, Revenue","description":"Amount of revenue attributable to disposal group, including, but not limited to, discontinued operation.","units":{"USD":[{"start":"2012-01-01","end":"2012-12-31","val":287000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-09-30","val":200000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":69000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":291000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":1017000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":272000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":573000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":301000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":239000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":883000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":58000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":306000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":240000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":1134000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":1134000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":210000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":210000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":216000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":216000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":6000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":6000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":216000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":215000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":215000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016"}]}},"DisposalGroupNotDiscontinuedOperationGainLossOnDisposal":{"label":"Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal","description":"Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations.","units":{"USD":[{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":55000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":55000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":55000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":55000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":55000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":55000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":55000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":8311000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":8311000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":8287000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":8287000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":-24000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":-24000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":11195000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":11195000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":2908000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":2908000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":13665000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":13665000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":13665000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":255935000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":255935000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":80594000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018"}]}},"DistributionMadeToMemberOrLimitedPartnerCashDistributionsDeclared":{"label":"Distribution Made to Member or Limited Partner, Cash Distributions Declared (Deprecated 2013-01-31)","description":"The equity impact of cash distributions declared to a common shareholder or unit-holder by a LLC or LP.","units":{"USD":[{"start":"2012-01-01","end":"2012-12-31","val":12900000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012"}]}},"DividendsCommonStock":{"label":"Dividends, Common Stock","description":"Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":6405000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":6405000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2011-01-01","end":"2011-12-31","val":6405000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-12-31","val":6405000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":6405000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":6405000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":547000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":1225000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-09-30","val":12885000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":12885000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":12885000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2012-01-01","end":"2012-12-31","val":12885000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-12-31","val":12885000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":12885000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":12885000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":3576000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":3576000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-09-30","val":3576000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-12-31","val":25679000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":25679000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2013-01-01","end":"2013-12-31","val":25679000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-12-31","val":25679000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":25679000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":25679000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":2937000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":6280000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":10417000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-12-31","val":15696000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":15696000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2014-01-01","end":"2014-12-31","val":15696000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-12-31","val":15696000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":15696000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":15696000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":5547000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":11167000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-09-30","val":16752000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-12-31","val":22280000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":22280000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2015-01-01","end":"2015-12-31","val":22280000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-12-31","val":22280000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":22280000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":22280000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":5472000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":10941000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-09-30","val":16468000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":21844000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":21844000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2016-01-01","end":"2016-12-31","val":21844000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-12-31","val":21844000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":21844000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":21844000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":5247000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":10545000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-09-30","val":15895000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-12-31","val":203809000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":203809000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2017-01-01","end":"2017-12-31","val":203809000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-12-31","val":203809000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":203809000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":203809000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":1034000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":1034000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":1916000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":1916000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":882000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":2786000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":2786000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":870000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":162694000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":162694000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":162694000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":578000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":578000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":1151000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":1151000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":573000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":573000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":1721000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":1721000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":570000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":570000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":1721000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":1721000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":1721000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":596000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":596000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":596000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":596000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":596000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":596000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":596000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":596000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":596000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":11016000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":11016000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":11016000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"}]}},"DividendsPayableCurrentAndNoncurrent":{"label":"Dividends Payable","description":"Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.","units":{"USD":[{"end":"2012-12-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q4I"},{"end":"2013-03-31","val":3576000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-12-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q4I"},{"end":"2014-03-31","val":2937000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-12-31","val":187914000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":187914000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":187914000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":187914000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":187914000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":0,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":0,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"},{"end":"2019-12-31","val":0,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019Q4I"},{"end":"2020-03-31","val":29000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-12-31","val":11016000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":11016000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":11016000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":11016000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":11016000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":0,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"}]}},"DividendsPreferredStock":{"label":"Dividends, Preferred Stock","description":"Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).","units":{"USD":[{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":365000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":365000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":597000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":597000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":232000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":232000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":788000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":788000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":191000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":191000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":989000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":989000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":989000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":225000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":225000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":453000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":453000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":230000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":230000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":644000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":644000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":191000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":191000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":913000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":913000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":913000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":191000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":191000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":718000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":718000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":528000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":528000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":1091000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":1091000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":373000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":373000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":1123000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":1123000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":1123000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":0,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"DueFromRelatedParties":{"label":"Due from Related Parties","description":"For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds.","units":{"USD":[{"end":"2015-12-31","val":0,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q4I"},{"end":"2016-03-31","val":141000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q4I"},{"end":"2017-03-31","val":269000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2020-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-12-31","val":7039000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":7039000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":7039000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":7039000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":7039000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":8240000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":1792000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":13000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"}]}},"DueToAffiliateCurrentAndNoncurrent":{"label":"Due to Affiliate","description":"Amount of payable due to an entity that is affiliated with the reporting entity by means of direct or indirect ownership.","units":{"USD":[{"end":"2014-12-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":23000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":33000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":1000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":59000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":59000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":59000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":59000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":59000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":164000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":59000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":51000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":55000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"}]}},"DueToRelatedPartiesCurrentAndNoncurrent":{"label":"Due to Related Parties","description":"Carrying amount as of the balance sheet date of obligations due all related parties.","units":{"USD":[{"end":"2010-12-31","val":378000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":378000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":378000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":6000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":31000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":31000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":31000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":31000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":31000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":7000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":80000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":4000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":21000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":21000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":21000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":21000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":21000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":1750000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"},{"end":"2016-12-31","val":55000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":55000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":55000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":55000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":27000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":26000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":33000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":26000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":26000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":26000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":26000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":26000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":47000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":39000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":65000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":36000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":36000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":36000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":36000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":36000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":82000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":98000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":37000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":1635000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":1635000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":1635000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":1635000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":1635000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":3660000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":4025000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":6449000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":2842000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":2842000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":2842000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":2842000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":2842000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":5115000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":1277000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":2152000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":1903000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":1903000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":1903000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":1903000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":1903000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":3881000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":12343000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":3252000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":2799000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":2799000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q4I"},{"end":"2023-03-31","val":3029000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"}]}},"EarningsPerShareBasic":{"label":"Earnings Per Share, Basic","description":"The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.","units":{"USD/shares":[{"start":"2019-01-01","end":"2019-12-31","val":-0.26,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-0.27,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-0.21,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":0.05,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":-0.32,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":-0.11,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-0.65,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":-0.65,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":0.07,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":0.07,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":0.29,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":0.29,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":0.22,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":0.22,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":0.04,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":0.04,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":-0.25,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":-0.25,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":-0.11,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":-0.11,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":-0.11,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-0.05,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":-0.05,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-0.13,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":-0.13,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":-0.09,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":-0.09,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":-0.43,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":-0.43,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":-0.29,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":-0.29,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":-0.44,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":-0.44,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":-0.44,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-0.19,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":-0.19,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-0.74,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":-0.74,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":-0.55,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":-0.55,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":-1.32,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":-1.32,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-0.58,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-0.58,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":-1.39,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":-1.39,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-0.74,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":-0.74,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":-1.17,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":-1.17,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":-0.43,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":-0.43,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":-1.59,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":-1.59,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":-0.42,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":-0.42,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":-0.98,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":-0.19,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":-1.23,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":-1.04,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":-2.37,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":-1.14,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"EarningsPerShareBasicAndDiluted":{"label":"Earnings Per Share, Basic and Diluted","description":"The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.","units":{"USD/shares":[{"start":"2009-01-01","end":"2009-12-31","val":-0.37,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":-1.44,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-04-01","end":"2010-06-30","val":-0.74,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":-1.1,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-07-01","end":"2010-09-30","val":-0.23,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":-1.18,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":-1.18,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-0.12,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2011-01-01","end":"2011-03-31","val":-0.12,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-0.32,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":-0.32,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":-0.19,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-04-01","end":"2011-06-30","val":-0.19,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":-0.19,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":-0.45,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":-0.45,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":-0.14,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-07-01","end":"2011-09-30","val":-0.14,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":-0.14,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":-0.66,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":-0.66,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":-0.66,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2011-10-01","end":"2011-12-31","val":-0.19,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4"},{"start":"2012-01-01","end":"2012-03-31","val":-0.03,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":-0.03,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-03-31","val":-0.03,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2012-01-01","end":"2012-03-31","val":-0.03,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-0.13,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":-0.13,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":-0.09,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":-0.09,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-04-01","end":"2012-06-30","val":-0.09,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":-0.09,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":-0.24,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":-0.24,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-0.1,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-0.1,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-07-01","end":"2012-09-30","val":-0.1,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-0.1,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":-0.28,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":-0.28,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":-0.28,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2012-10-01","end":"2012-12-31","val":-0.05,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-10-01","end":"2012-12-31","val":-0.05,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4"},{"start":"2013-01-01","end":"2013-03-31","val":0.02,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":0.02,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-03-31","val":0.02,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2013-01-01","end":"2013-03-31","val":0.02,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-0.02,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":-0.02,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":-0.04,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":-0.04,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-04-01","end":"2013-06-30","val":-0.04,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":-0.04,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":0.11,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":0.11,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":0.13,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":0.13,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-07-01","end":"2013-09-30","val":0.13,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":0.13,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":0.2,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":0.2,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":0.2,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2013-10-01","end":"2013-12-31","val":0.09,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-10-01","end":"2013-12-31","val":0.09,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4"},{"start":"2014-01-01","end":"2014-03-31","val":-0.16,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-0.16,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-03-31","val":-0.16,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2014-01-01","end":"2014-03-31","val":-0.16,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-0.25,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":-0.25,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":-0.09,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":-0.09,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-04-01","end":"2014-06-30","val":-0.09,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":-0.09,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":-0.31,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":-0.31,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":-0.06,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":-0.06,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-07-01","end":"2014-09-30","val":-0.06,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":-0.06,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-0.39,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":-0.39,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":-0.39,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2014-10-01","end":"2014-12-31","val":-0.08,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-10-01","end":"2014-12-31","val":-0.08,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4"},{"start":"2015-01-01","end":"2015-03-31","val":0.04,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":0.04,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-03-31","val":0.04,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2015-01-01","end":"2015-03-31","val":0.04,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0.06,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":0.06,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":0.03,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":0.03,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-04-01","end":"2015-06-30","val":0.03,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":0.03,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":0.05,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":0.05,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":-0.01,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":-0.01,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-07-01","end":"2015-09-30","val":-0.01,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":-0.01,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":0.04,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":0.04,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":0.04,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2015-10-01","end":"2015-12-31","val":-0.02,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-10-01","end":"2015-12-31","val":-0.02,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4"},{"start":"2016-01-01","end":"2016-03-31","val":-0.08,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":-0.08,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-03-31","val":-0.08,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2016-01-01","end":"2016-03-31","val":-0.08,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":-0.12,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":-0.12,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":-0.03,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":-0.03,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-04-01","end":"2016-06-30","val":-0.03,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":-0.03,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":-0.37,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":-0.37,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":-0.25,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":-0.25,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-07-01","end":"2016-09-30","val":-0.25,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":-0.25,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":-0.5,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":-0.5,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":-0.5,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2016-10-01","end":"2016-12-31","val":-0.12,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-10-01","end":"2016-12-31","val":-0.12,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4"},{"start":"2017-01-01","end":"2017-03-31","val":-0.16,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":-0.16,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-03-31","val":-0.16,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2017-01-01","end":"2017-03-31","val":-0.16,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":0.26,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":0.26,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":0.42,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":0.42,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-04-01","end":"2017-06-30","val":0.42,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":0.42,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":0.07,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":0.07,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":-0.19,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":-0.19,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-07-01","end":"2017-09-30","val":-0.19,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":-0.19,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":3.77,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":3.77,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":3.77,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2017-10-01","end":"2017-12-31","val":3.88,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-10-01","end":"2017-12-31","val":3.88,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4"},{"start":"2018-01-01","end":"2018-03-31","val":-0.38,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":-0.38,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-03-31","val":-0.38,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2018-01-01","end":"2018-03-31","val":-0.38,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-0.22,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":-0.22,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":0.16,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":0.16,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-04-01","end":"2018-06-30","val":0.16,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":0.16,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":0.38,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":0.38,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":0.67,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":0.67,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-07-01","end":"2018-09-30","val":0.67,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":0.67,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":0.57,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":0.57,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":0.57,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2018-10-01","end":"2018-12-31","val":0.19,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-10-01","end":"2018-12-31","val":0.19,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4"},{"start":"2019-01-01","end":"2019-03-31","val":0.25,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":0.25,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-03-31","val":0.25,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":0.16,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":0.16,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":-0.09,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":-0.09,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-04-01","end":"2019-06-30","val":-0.09,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":0.17,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":0.17,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":0.01,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":0.01,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-07-01","end":"2019-09-30","val":0.01,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":-0.26,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":-0.26,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019"},{"start":"2019-10-01","end":"2019-12-31","val":-0.43,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4"},{"start":"2020-01-01","end":"2020-03-31","val":-0.27,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-0.21,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":0.05,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":-0.32,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":-0.11,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-0.65,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020"}]}},"EarningsPerShareDiluted":{"label":"Earnings Per Share, Diluted","description":"The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.","units":{"USD/shares":[{"start":"2019-01-01","end":"2019-12-31","val":-0.26,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-0.27,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-0.21,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":0.05,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":-0.32,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":-0.11,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-0.65,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":-0.65,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":0.07,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":0.07,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":0.29,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":0.29,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":0.22,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":0.22,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":0.04,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":0.04,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":-0.25,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":-0.25,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":-0.11,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":-0.11,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":-0.11,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-0.05,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":-0.05,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-0.13,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":-0.13,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":-0.09,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":-0.09,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":-0.43,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":-0.43,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":-0.29,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":-0.29,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":-0.44,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":-0.44,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":-0.44,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-0.19,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":-0.19,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-0.74,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":-0.74,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":-0.55,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":-0.55,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":-1.32,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":-1.32,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-0.58,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-0.58,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":-1.39,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":-1.39,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-0.74,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":-0.74,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":-1.17,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":-1.17,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":-0.43,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":-0.43,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":-1.59,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":-1.59,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":-0.42,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":-0.42,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":-0.98,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":-0.19,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":-1.23,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":-1.04,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":-2.37,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":-1.14,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"EffectOfExchangeRateOnCashAndCashEquivalents":{"label":"Effect of Exchange Rate on Cash and Cash Equivalents","description":"Amount of increase (decrease) from the effect of exchange rate changes on cash and cash equivalent balances held in foreign currencies.","units":{"USD":[{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-03-31","val":8614000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":4123000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-09-30","val":3497000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"}]}},"EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents":{"label":"Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents","description":"Amount of increase (decrease) from effect of exchange rate changes on cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; held in foreign currencies. Excludes amounts for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.","units":{"USD":[{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-06-30","val":4170000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":3711000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":3549000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":3549000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":362000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":596000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":596000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":514000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":514000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":611000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":611000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":611000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":-22000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":-22000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-303000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":-303000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":1127000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":1127000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":-662000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":-662000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":-662000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":2096000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":2096000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":2203000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":2203000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":2367000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":2367000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":2491000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":2491000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":2491000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-528000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":-528000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-130000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":-130000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":83000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":83000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":1204000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":1204000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":1204000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":-1881000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":-1881000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":-310000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":-310000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":182000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":182000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":1734000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":1734000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":1734000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-299000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":-299000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-3619000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":-3619000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":-4418000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":-4418000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":-3744000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":-3744000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":-3744000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-469000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":-469000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-1225000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":-1225000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-01-01","end":"2023-09-30","val":-4153000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":-4153000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":-2127000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":-2127000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":1019000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":1019000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":1809000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":1809000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":1570000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":1570000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-01-01","end":"2024-12-31","val":946000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":-325000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":1071000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":357000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"EquityMethodInvestmentDividendsOrDistributions":{"label":"Proceeds from Equity Method Investment, Distribution","description":"Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.","units":{"USD":[{"start":"2013-01-01","end":"2013-03-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1"}]}},"EquitySecuritiesFvNi":{"label":"Equity Securities, FV-NI","description":"Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).","units":{"USD":[{"end":"2018-12-31","val":73876000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":73876000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":73876000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-06-30","val":65267000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":79112000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":81439000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":81439000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":81439000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":81439000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":81439000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":64024000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":76664000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":84365000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":97903000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":97903000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":97903000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":97903000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":97903000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":94217000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":99017000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":96403000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":112096000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":112096000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":112096000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":112096000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":112096000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":104575000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":84505000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":63784000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":60153000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":60153000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":60153000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":60153000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":60153000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":48120000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":30474000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":26909000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":41609000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":41609000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":41609000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":41609000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":41609000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":11950000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":8598000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":17325000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":13154000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":13154000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":13154000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":13154000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":13154000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":14116000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":14758000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"EquitySecuritiesFvNiGainLoss":{"label":"Equity Securities, FV-NI, Gain (Loss)","description":"Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).","units":{"USD":[{"start":"2018-01-01","end":"2018-06-30","val":-7287000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":8724000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":-6514000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":684000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":-18173000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":-19010000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":7768000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":12062000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":15459000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":4294000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":4294000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":15907000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":19304000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":3845000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":3845000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":16221000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":20379000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":20379000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-26818000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":-26818000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-15094000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":-15094000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":11360000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":11360000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":-21620000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":-21620000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":-6527000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":-6527000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-14814000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":-14814000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":-14814000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":10528000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":10528000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":15553000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":15553000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":4800000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":4800000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":12939000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":12939000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":-2614000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":-2614000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":28632000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":28632000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":28632000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-7521000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":-7521000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-27591000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":-27591000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":-20070000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":-20070000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":-48312000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":-48312000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":-20722000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":-20722000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":-51943000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":-51943000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":-51943000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-12033000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":-12033000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-16122000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":-16122000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":-4089000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":-4089000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":-19453000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":-19453000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-3331000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-3331000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":-4598000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":-4598000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-15350000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":-15350000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":-16632000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":-16632000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":-1282000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":-1282000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":-7905000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":-7905000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":8726000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":8726000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":-12076000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":0,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":962000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":962000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":1604000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":642000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"EquitySecuritiesFvNiRealizedGainLoss":{"label":"Equity Securities, FV-NI, Realized Gain (Loss)","description":"Amount of realized gain (loss) from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).","units":{"USD":[{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":32000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":-57000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":837000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-3397000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-3397000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":3397000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":-3397000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":3397000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":-4158000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":4158000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-364000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":-364000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":711000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":711000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":347000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":347000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":711000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":711000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":711000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":711000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":-225000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":-225000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":225000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":225000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":225000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":225000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":3036000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":3036000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":0,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":0,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":0,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":5809000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":5809000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":5901000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":93000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3"}]}},"EquitySecuritiesFvNiUnrealizedGainLoss":{"label":"Equity Securities, FV-NI, Unrealized Gain (Loss)","description":"Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).","units":{"USD":[{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-06-30","val":-7287000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":8724000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":-6546000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":741000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":-19010000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":11165000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":15459000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":12062000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":4294000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":4294000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":19304000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":15907000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":3845000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":3845000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":20379000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":16221000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-26454000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":-26454000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-15805000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":-15805000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":11013000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":11013000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":-22331000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":-22331000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":-6527000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":-6527000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-15525000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":-15525000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":10753000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":10753000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":15328000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":15328000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":4800000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":4800000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":12714000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":12714000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":-2614000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":-2614000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":25596000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":25596000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-7521000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":-7521000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-27591000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":-27591000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":-20070000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":-20070000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":-48312000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":-48312000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":-20722000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":-20722000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":-51943000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-12033000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-16122000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":-4089000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":-19453000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-3331000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3"}]}},"EscrowDepositDisbursementsRelatedToPropertyAcquisition1":{"label":"Escrow Deposit Disbursements Related to Property Acquisition","description":"Amount of escrow deposit disbursements related to property acquisition in noncash investing or financing transactions.","units":{"USD":[{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":2000000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":2000000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":2000000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":2000000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":2000000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":2000000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018"}]}},"EstimatedInsuranceRecoveries":{"label":"Estimated Insurance Recoveries","description":"Carrying amount as of the balance sheet date of amounts expected to be recovered under the terms of insurance contracts.","units":{"USD":[{"end":"2014-03-31","val":600000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":800000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":700000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":700000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-06-30","val":2500000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":2100000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":2100000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-12-31","val":1400000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"}]}},"ExtinguishmentOfDebtAmount":{"label":"Extinguishment of Debt, Amount","description":"Gross amount of debt extinguished.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-09-30","val":-7545000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":-7545000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":35750000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":35750000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":35750000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015"},{"end":"2017-03-06","val":156000000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2017-03-06","val":156000000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2017-03-06","val":156000000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2017-03-06","val":156000000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q1I"}]}},"FairValueOfAssetsAcquired":{"label":"Fair Value of Assets Acquired","description":"The fair value of assets acquired in noncash investing or financing activities.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":2775000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":2775000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":6556000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":32213000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":32213000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":32213000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":32213000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":32213000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":32213000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":32213000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-09-30","val":45943000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":45943000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":45943000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":45943000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-09-30","val":137569000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":137569000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":137569000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"FinanceLeaseInterestExpense":{"label":"Finance Lease, Interest Expense","description":"Amount of interest expense on finance lease liability.","units":{"USD":[{"start":"2020-01-01","end":"2020-12-31","val":107000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":107000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":114000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":224000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-09-30","val":441000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-12-31","val":501000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":501000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":111000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":223000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":111000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":334000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":112000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":446000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":112000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":225000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":113000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":338000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":113000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3"}]}},"FinanceLeaseLiability":{"label":"Finance Lease, Liability","description":"Present value of lessee's discounted obligation for lease payments from finance lease.","units":{"USD":[{"end":"2020-12-31","val":9274000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":9274000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":9298000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":9318000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":9339000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":9360000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":9360000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":9381000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":9403000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":9424000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":9446000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":9446000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":9469000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":9491000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":9514000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":9537000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":9537000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":9537000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":9537000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":9537000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":9561000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":9584000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":9494000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":9632000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":9632000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":9632000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":9632000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":9651000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":9666000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":9682000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"FinanceLeaseLiabilityPaymentsDue":{"label":"Finance Lease, Liability, Payment, Due","description":"Amount of lessee's undiscounted obligation for lease payments for finance lease.","units":{"USD":[{"end":"2020-12-31","val":54396000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-03-31","val":54306000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":54216000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":54126000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":54036000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":53946000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":53856000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":53766000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":53676000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-03-31","val":53586000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":53496000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":53406000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":53316000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-03-31","val":53226000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":53136000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":53046000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":52956000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"},{"end":"2025-03-31","val":52860000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":52761000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":52662000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"FinanceLeaseLiabilityPaymentsDueAfterYearFive":{"label":"Finance Lease, Liability, to be Paid, after Year Five","description":"Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2020-12-31","val":52563000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-03-31","val":52563000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":52563000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-12-31","val":52167000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":52167000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":52167000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":52167000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":51771000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-03-31","val":51771000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":51771000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":51771000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":51375000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-12-31","val":50979000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"}]}},"FinanceLeaseLiabilityPaymentsDueNextTwelveMonths":{"label":"Finance Lease, Liability, to be Paid, Year One","description":"Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2020-12-31","val":360000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-03-31","val":270000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":180000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":360000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":360000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":270000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":180000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":90000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":360000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-03-31","val":270000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":180000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":90000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":360000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-03-31","val":393000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":393000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":393000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":393000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"},{"end":"2025-03-31","val":396000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":396000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":396000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"FinanceLeaseLiabilityPaymentsDueYearFive":{"label":"Finance Lease, Liability, to be Paid, Year Five","description":"Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2020-12-31","val":393000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-03-31","val":393000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":393000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-12-31","val":396000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":396000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":396000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":396000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":396000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-03-31","val":396000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":396000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":396000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":396000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-12-31","val":396000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"}]}},"FinanceLeaseLiabilityPaymentsDueYearFour":{"label":"Finance Lease, Liability, to be Paid, Year Four","description":"Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2020-12-31","val":360000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-03-31","val":360000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":360000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":393000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":393000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":393000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":393000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":393000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":396000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-03-31","val":396000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":396000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":396000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":396000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-03-31","val":396000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":396000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":396000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":396000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"},{"end":"2025-03-31","val":396000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":396000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":396000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"FinanceLeaseLiabilityPaymentsDueYearThree":{"label":"Finance Lease, Liability, to be Paid, Year Three","description":"Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2020-12-31","val":360000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-03-31","val":360000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":360000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":360000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":360000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":360000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":360000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":360000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":393000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-03-31","val":393000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":393000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":393000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":396000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-03-31","val":396000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":396000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":396000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":396000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"},{"end":"2025-03-31","val":396000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":396000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":396000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"FinanceLeaseLiabilityPaymentsDueYearTwo":{"label":"Finance Lease, Liability, to be Paid, Year Two","description":"Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2020-12-31","val":360000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-03-31","val":360000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":360000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":360000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":360000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":360000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":360000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":360000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":360000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-03-31","val":360000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":360000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":360000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":393000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-03-31","val":396000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":396000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":396000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":396000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"},{"end":"2025-03-31","val":396000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":396000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":396000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear":{"label":"Finance Lease, Liability, to be Paid, Remainder of Fiscal Year","description":"Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in remainder of current fiscal year.","units":{"USD":[{"end":"2021-09-30","val":90000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2024-03-31","val":270000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":180000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":90000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2025-03-31","val":297000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":198000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":99000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"FinanceLeaseLiabilityUndiscountedExcessAmount":{"label":"Finance Lease, Liability, Undiscounted Excess Amount","description":"Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for finance lease.","units":{"USD":[{"end":"2020-12-31","val":45122000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-03-31","val":45008000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":44898000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":44787000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":44676000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":44565000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":44453000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":44342000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":44230000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-03-31","val":44117000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":44005000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":43892000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":43779000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-03-31","val":43665000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":43552000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":43552000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":43324000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"},{"end":"2025-03-31","val":43209000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":43095000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":42980000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"FinanceLeaseRightOfUseAsset":{"label":"Finance Lease, Right-of-Use Asset, after Accumulated Amortization","description":"Amount, after accumulated amortization, of right-of-use asset from finance lease.","units":{"USD":[{"end":"2020-12-31","val":9258000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":9258000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":9258000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":9258000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":8074000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":8074000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":8074000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":8074000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":8074000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":7281000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":7281000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":7281000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":7281000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":7281000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":6391000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":6391000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":6391000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":6391000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":6391000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":6391000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":6391000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":6391000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":6014000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":6014000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":6014000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":6014000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":6014000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":6014000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":5763000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":4955000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"FinanceLeaseWeightedAverageDiscountRatePercent":{"label":"Finance Lease, Weighted Average Discount Rate, Percent","description":"Weighted average discount rate for finance lease calculated at point in time.","units":{"pure":[{"end":"2020-12-31","val":0.048,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":0.048,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":0.048,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":0.048,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":0.048,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":0.048,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":0.048,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":0.048,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":0.048,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":0.048,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":0.048,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":0.048,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":0.048,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":0.048,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":0.048,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":0.048,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":0.048,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":0.048,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":0.048,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":0.048,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":0.048,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":0.048,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":0.048,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":0.048,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":0.048,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":0.048,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":0.048,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":0.048,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":0.048,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":0.048,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"ForeignCurrencyTransactionGainLossBeforeTax":{"label":"Foreign Currency Transaction Gain (Loss), before Tax","description":"Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.","units":{"USD":[{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-303000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":-303000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":2037000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":2037000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":-4602000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":-4602000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":-6639000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":-2997000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":-2997000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":-2997000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":-4671000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":-4671000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":-7097000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":-7097000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":-2426000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":-11454000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":-11454000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":-4356000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":-4356000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":-15298000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":-15298000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":-15298000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":-997000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":-997000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":9114000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":9114000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":10111000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":10111000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":9106000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":9106000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":-8000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":-8000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":10141000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":10141000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":10141000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-2816000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":-2816000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-5290000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":-5290000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":-2474000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":-2474000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":-10634000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":-10634000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":-5344000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":-5344000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":-12498000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":-12498000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":-12498000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":14996000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":14996000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":12783000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":12783000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":-2213000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":-2213000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":12338000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":12338000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":-445000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":-445000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-2912000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":-2912000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":-2912000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":8346000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":8346000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":2839000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":2839000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":-5507000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":-5507000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":568000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":568000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":-2271000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":-2271000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":-7445000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":-7445000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":-7445000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":7266000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":7266000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":31098000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":31098000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":23833000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":23833000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":37100000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":37100000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":6001000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":6001000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":29038000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":29038000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":29038000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":2719000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":2719000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-3553000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":-3553000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":-6272000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":-6272000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":-4675000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":-4675000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-1123000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-1123000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":-18712000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":-18712000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":3913000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":3913000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":11280000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":11280000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":7368000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":7368000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":6724000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":6724000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":-4556000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":-4556000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":-3156000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":5984000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":-24157000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":-30141000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":-30063000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":-5906000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"ForeignCurrencyTransactionGainLossRealized":{"label":"Foreign Currency Transaction Gain (Loss), Realized","description":"Amount before tax of foreign currency transaction realized gain (loss) recognized in the income statement.","units":{"USD":[{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-303000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":2037000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":2037000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":2340000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":2340000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":-4602000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":-6639000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":-2997000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":-4671000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":-7097000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":-2426000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2"}]}},"GainLossOnCondemnation":{"label":"Gain (Loss) on Condemnation","description":"The gain (loss) is the pre-tax difference between the net condemnation award and the entity's adjusted basis of the condemned property.","units":{"USD":[{"start":"2015-01-01","end":"2015-06-30","val":4900000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-09-30","val":5100000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-12-31","val":5100000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015"}]}},"GainLossOnSaleOfDerivatives":{"label":"Gain (Loss) on Sale of Derivatives","description":"The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings.","units":{"USD":[{"end":"2020-07-29","val":14100000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2020-07-29","val":14100000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q2I"}]}},"GainsLossesOnExtinguishmentOfDebt":{"label":"Gain (Loss) on Extinguishment of Debt","description":"Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-03-22","end":"2012-03-23","val":600000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-03-31","val":597000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":597000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":581000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":581000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":-16000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":-16000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":581000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":581000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":581000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":581000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":581000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-09-30","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":-478000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":-478000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":-478000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":-26000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":-26000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":-26000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":-26000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":-493000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":-493000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":-493000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-856000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":-856000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-856000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":-856000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":-861000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":-861000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":-6000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":-6000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":-1106000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":-1106000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":-1106000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":415000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":415000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":415000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":13000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":13000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":13000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":13000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":1365000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":1365000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":1352000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":1352000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":-4757000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":-4757000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":-4757000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":2367000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":2367000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":2367000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":2367000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":2367000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":2367000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":2367000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":2367000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":2367000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":0,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-09-30","val":0,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":0,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":-6033000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-09-30","val":-1045000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":-1045000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"GainsLossesOnSalesOfInvestmentRealEstate":{"label":"Gains (Losses) on Sales of Investment Real Estate","description":"The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes.","units":{"USD":[{"start":"2016-01-01","end":"2016-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2017-01-01","end":"2017-03-31","val":0,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":34028000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":34028000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":34028000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":34028000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":36267000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":36267000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":2239000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":2239000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":255935000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":624000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":624000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":649000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":649000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":25000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":25000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":45340000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":45340000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":44692000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":44692000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":80594000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":80594000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":7575000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":7575000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":7569000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":7569000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":-6000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":-6000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":18128000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":18128000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":10559000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":10559000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":34077000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":34077000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":34077000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-110000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":-110000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":-110000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":21000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":21000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":31170000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":31170000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":31148000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":31148000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":31385000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":31385000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":216000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":216000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":30261000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":30261000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":30261000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":3523000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":3523000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":3348000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":3348000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":-175000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":-175000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":3273000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":3273000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":-75000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":-75000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":46513000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":46513000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":46513000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":29469000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":29469000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-05-01","end":"2023-05-31","val":3300000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-05-01","end":"2023-05-31","val":3300000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q2I"},{"start":"2023-01-01","end":"2023-06-30","val":32761000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":32761000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":3292000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":3292000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":32541000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":32541000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-221000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-221000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-10-01","end":"2023-10-31","val":43700000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q3I"},{"start":"2023-01-01","end":"2023-12-31","val":82099000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":82099000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":452000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":452000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":619000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":619000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":167000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":167000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":-624000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":-624000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":-1243000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":-1243000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":119018000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":164000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":1244000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":1080000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":-6392000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":-7636000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"GeneralAndAdministrativeExpense":{"label":"General and Administrative Expense","description":"The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":7000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":610000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-04-01","end":"2010-06-30","val":607000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":975000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-07-01","end":"2010-09-30","val":365000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":1635000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":1635000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":439000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":896000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":896000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":457000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-04-01","end":"2011-06-30","val":457000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":1420000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":1420000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":524000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-07-01","end":"2011-09-30","val":524000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":2005000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":2005000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":1956000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":653000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":646000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":1863000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":1856000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":1211000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":1211000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":2445000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":2391000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":598000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":593000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":3152000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":3075000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":3075000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":822000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":818000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":1696000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":1678000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":875000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":859000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":2326000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":2326000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":649000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":649000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":3160000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":3160000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":3160000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":911000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":911000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":1889000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":1889000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":978000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":978000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":2618000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":2618000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":726000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":726000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":3418000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":3418000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":3418000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":862000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":862000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":1732000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":1732000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":869000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":869000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":2624000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":2624000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":892000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":892000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":3246000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":3246000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":3246000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":1440000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":1137000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":2835000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":2835000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":1699000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":1699000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":4172000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":4172000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":1337000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":1337000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":5781000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":5781000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":5761000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":1744000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":1744000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":3123000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":3123000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":1378000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":1378000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":4291000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":4115000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":1170000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":1168000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":6138000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":5983000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":5983000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":2052000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":2052000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":4302000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":4302000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":2250000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":2250000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":6037000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":6215000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":1488000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":1914000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":7784000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":7784000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":8220000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":1533000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":1533000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":3548000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":3548000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":2015000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":2015000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":5586000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":5586000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":2038000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":2038000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":7456000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":7388000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":7388000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":2546000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":2546000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":4337000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":4337000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":1789000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":1789000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":6302000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":6302000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":1960000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":1960000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":7664000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":7664000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":7664000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":1869000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":1869000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":4759000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":4759000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":2888000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":2888000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":7120000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":7120000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":2365000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":2365000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":9853000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":9853000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":9853000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":2991000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":2991000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":5977000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":5977000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":2983000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":2983000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":8486000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":8486000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":2504000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":2504000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":10700000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":10700000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":10700000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":3001000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":3001000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":6220000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":6220000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":3222000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":3222000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":8176000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":8176000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":1952000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":1952000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":10476000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":10476000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":3252000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":3252000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":7793000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":7793000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":4541000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":4541000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":10108000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":10108000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":2314000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":2314000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":11665000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":2849000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":6211000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":3361000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":8525000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":2315000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"Goodwill":{"label":"Goodwill","description":"Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.","units":{"USD":[{"end":"2019-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-12-31","val":16342000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":16342000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":16342000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":16342000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":16342000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2020-12-31","val":16342000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020Q4I"},{"end":"2021-03-31","val":16342000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":16342000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":13534000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":13534000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":13534000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":13534000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":13534000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":13534000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2021-12-31","val":13534000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021Q4I"},{"end":"2022-03-31","val":13534000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":13534000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":5436000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":5436000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":5436000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":5436000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":5436000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":5436000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":5436000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":5436000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":5436000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":948000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"}]}},"GoodwillImpairmentLoss":{"label":"Goodwill, Impairment Loss","description":"Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.","units":{"USD":[{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-09-30","val":2808000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":2808000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":2808000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":2808000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":2808000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":2808000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":2808000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-09-30","val":8098000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":8098000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":8098000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":8098000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":8098000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":8098000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":8098000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":4488000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":4488000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-09-30","val":0,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":0,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-09-30","val":949000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":949000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"HeldToMaturitySecurities":{"label":"Debt Securities, Held-to-maturity","description":"Amount of investment in debt security measured at amortized cost (held-to-maturity).","units":{"USD":[{"end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-12-31","val":5000000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":5000000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":5000000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":5000000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":5000000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":10000000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":17500000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":17500000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":17500000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":17500000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":17500000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":17500000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":17500000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":17500000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":17500000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":17500000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":13000000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":13000000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":13000000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":13000000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":13000000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":0,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"}]}},"HeldToMaturitySecuritiesFairValue":{"label":"Debt Securities, Held-to-maturity, Fair Value","description":"Fair value of investment in debt security measured at amortized cost (held-to-maturity).","units":{"USD":[{"end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-12-31","val":4683000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":4683000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q4I"},{"end":"2017-03-31","val":9754000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"}]}},"ImpairmentOfRealEstate":{"label":"Impairment of Real Estate","description":"The charge against earnings in the period to reduce the carrying amount of real property to fair value.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":1433000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":1433000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":1433000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":579000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":579000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":579000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-09-30","val":10971000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":10971000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":10971000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":10971000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":10971000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":11000000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2021-01-01","end":"2021-12-31","val":10971000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":10971000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":0,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":11942000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":11942000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":11942000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":11942000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":18493000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":18493000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":18493000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":17663000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":17663000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":36589000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":36589000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":18926000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":18926000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":64849000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":64849000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":28260000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":28260000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":64849000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":64849000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":39265000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":39265000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":60291000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":60291000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":21026000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":21026000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":76090000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":76090000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":15800000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":15800000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":76090000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":0,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":51979000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":51979000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":128776000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":76797000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"IncentiveToLessee":{"label":"Incentive to Lessee","description":"This item represents the deferred charge for an incentive or inducement granted by a lessor to a lessee, in order to motivate the lessee to enter the lease agreement, which incentive or inducement is to be recognized as a reduction of rental revenue over the lease term.","units":{"USD":[{"end":"2013-12-31","val":1200000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":1200000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":1200000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-06-30","val":1600000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":1600000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":1600000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":1600000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":1600000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":1600000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":1600000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":2200000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":2200000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":2200000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":2800000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":2800000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":2800000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":2800000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":2800000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":3100000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":3400000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":3300000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":3200000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":3200000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":3200000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":3200000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":900000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":3000000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":3100000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":3000000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":900000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":900000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":800000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":800000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":600000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":1000000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":1000000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":1500000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":1300000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":1300000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":1300000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":1300000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":1300000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":1300000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":3400000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":3300000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":3100000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":3100000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":3100000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":3100000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":3100000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":3300000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":3200000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":3300000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":4700000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":4700000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":4200000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":4200000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":4700000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":5100000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":3500000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":3100000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":3300000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":3300000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":3300000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":3300000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":3300000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":3000000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":2800000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":3000000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":2800000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":2800000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":2800000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":2800000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":2800000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":2900000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":2900000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":2300000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":2500000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":2500000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":2500000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":2500000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":2500000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":2200000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":3000000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":2800000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":2200000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":2200000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":2200000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":1500000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":2600000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":2200000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":1500000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"IncomeLossFromContinuingOperations":{"label":"Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent","description":"Amount after tax of income (loss) from continuing operations attributable to the parent.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":-7400000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-1086000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-3640000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":-2559000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":-6843000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-3253000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":-8840000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":-8840000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":-2096000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":-1719000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-4435000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":-3814000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":-2343000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":-2095000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":2987000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":3774000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":7416000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":7586000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":150000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":150000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":150000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-9604000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-9604000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-14915000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":-14915000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":-5311000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":-5311000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":-18297000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":-18297000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":-3382000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":-3382000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-23176000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":-23176000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":2235000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":3761000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":1526000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":3299000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":-462000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":2444000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015"}]}},"IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity":{"label":"Income (Loss) from Continuing Operations, Net of Tax, Attributable to Noncontrolling Interest","description":"Amount after tax of income (loss) from continuing operations attributable to the noncontrolling interest.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":216000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-103000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-27000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":77000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":105000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":132000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":232000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":232000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":68000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":68000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":154000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":154000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":86000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":86000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":238000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":238000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":84000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":84000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":302000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":302000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":-302000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":277000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-277000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":426000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":426000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":149000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":149000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":486000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":-486000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":59000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":-59000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":554000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":-554000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":3150000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-4263000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":-1113000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":4448000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":185000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":4688000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015"}]}},"IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest":{"label":"Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest","description":"Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.","units":{"USD":[{"start":"2016-01-01","end":"2016-12-31","val":-29106000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-09-30","val":4386000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":-10540000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":210735000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":210735000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-09-30","val":22889000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":36847000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":33760000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":33760000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":-15249000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":-15181000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":-15181000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-17639000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":-17639000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-13779000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":-13779000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":3860000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":3860000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":-21147000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":-21147000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":-7368000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":-7368000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-48813000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":-48813000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":-48813000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":6042000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":6042000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":27798000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":27798000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":21758000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":21758000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":2253000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":2253000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":-25546000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":-25546000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":-12498000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":-12498000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":-12498000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-4729000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":-4729000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-13100000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":-13100000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":-8369000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":-8369000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":-44101000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":-44101000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":-31000000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":-31000000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":-36746000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":-36746000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-16108000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":-16108000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-73589000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":-73589000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":-57481000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":-57481000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":-136132000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":-136132000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-62543000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-62543000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":-139901000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-76994000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":-122652000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":-45658000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":-168358000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":-45706000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3"}]}},"IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest":{"label":"Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest","description":"Amount after tax of income (loss) from continuing operations including portion attributable to the noncontrolling interest.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":-1975000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-703000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-2380000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":-1677000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":-4326000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":-1947000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":-7750000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":-7616000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-1250000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":-983000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-4108000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":-3613000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":-2858000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":-2636000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":-7766000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":-6948000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-3658000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-3385000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":-9679000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":-9072000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":-9072000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":-2164000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":-1787000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-4589000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":-3968000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":-2429000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":-2181000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":2749000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":3536000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":7332000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":7502000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":-152000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":-152000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":-152000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-9881000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-9881000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-15341000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":-15341000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":-5460000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":-5460000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":-18783000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":-18783000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":-3441000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":-3441000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-23730000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":-23730000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":5385000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":8024000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":2639000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":7747000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":-277000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":7132000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015"}]}},"IncomeLossFromContinuingOperationsPerBasicAndDilutedShare":{"label":"Income (Loss) from Continuing Operations, Per Basic and Diluted Share","description":"The amount of net income (loss) from continuing operations per each basic and diluted share of common stock or unit when the per share amount is the same for both basic and diluted shares.","units":{"USD/shares":[{"start":"2010-01-01","end":"2010-12-31","val":-1.18,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-0.12,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-0.32,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":-0.19,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":-0.45,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":-0.14,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":-0.66,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":-0.65,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-0.05,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":-0.04,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-0.15,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":-0.14,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":-0.09,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":-0.08,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":-0.26,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":-0.23,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-0.1,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-0.09,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":-0.27,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":-0.25,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":-0.25,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":-0.04,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":-0.03,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-0.08,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":-0.07,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":-0.04,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":-0.04,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":0.05,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":0.06,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":0.13,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":0.13,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-0.16,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-0.16,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-0.25,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":-0.25,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":-0.09,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":-0.09,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":-0.31,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":-0.31,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":-0.06,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":-0.06,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-0.39,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":-0.39,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0.04,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0.06,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":0.03,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":0.05,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":-0.01,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":0.04,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015"}]}},"IncomeLossFromDiscontinuedOperationsNetOfTax":{"label":"Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest","description":"Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":-49000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":-183000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":545000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":278000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":595000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":100000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":50000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":-172000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":593000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":-225000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-2000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-275000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":-416000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":-1023000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":-1023000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":3905000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":3528000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":3902000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":3281000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":-248000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":3825000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":3038000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":-72000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":-242000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":11741000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":11741000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":11741000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-13000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-13000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-33000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":-33000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":-20000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":-20000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":-18000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":-18000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":15000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":15000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-18000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":-18000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015"}]}},"IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest":{"label":"Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Noncontrolling Interest","description":"Amount after tax of income (loss) from a discontinued operation attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":2000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":25000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":48000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":22000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":77000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":29000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":101000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":101000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":-398000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":-398000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-398000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":-398000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":-398000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":-398000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":-398000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":-398000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":-398000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015"}]}},"IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity":{"label":"Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent","description":"Amount after tax of income (loss) from a discontinued operation attributable to the parent. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":-181000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":303000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":148000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":-150000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":-148000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-246000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":-922000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":-922000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":3507000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":3130000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":3504000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":2883000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":-248000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":3427000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":2640000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":-72000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":-242000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":11343000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":11343000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":11343000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-13000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-13000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-33000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":-33000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":-20000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":-20000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":-18000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":-18000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":15000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":15000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-18000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":-18000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015"}]}},"IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare":{"label":"Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic and Diluted Share","description":"Per basic and diluted share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation, when the per share amount is the same.","units":{"USD/shares":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":-0.01,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":0.02,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":0.01,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":0.02,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":0.01,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":-0.01,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":0.02,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":-0.01,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-0.01,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":-0.01,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":-0.03,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":-0.03,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0.06,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":0.05,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0.06,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":0.05,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":0.06,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":0.05,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":0.2,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":0.2,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":0.2,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015"}]}},"IncomeLossFromEquityMethodInvestments":{"label":"Income (Loss) from Equity Method Investments","description":"Amount of income (loss) for proportionate share of equity method investee's income (loss).","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-09-30","val":116000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":116000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":-146000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":-146000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":-146000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-168000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-168000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-501000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":-501000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":-333000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":-333000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":-757000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":-757000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":-256000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":-256000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-1101000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":-1101000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":-1101000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":-218000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":-218000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-336000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":-336000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":-118000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":-118000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":-186000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":-186000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":150000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":150000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":-368000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":-368000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-196000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":-348000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":-152000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":-1139000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":-791000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":-1408000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":1869000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":1869000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":1869000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":1869000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":0,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":1869000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":1869000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":2073000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":2073000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":2073000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":53000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":53000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":185000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":185000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":131000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":131000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":428000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":428000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":244000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":244000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":428000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":428000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":428000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":52000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":52000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":52000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":52000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":97000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":97000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":97000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022"}]}},"IncomeTaxExpenseBenefit":{"label":"Income Tax Expense (Benefit)","description":"Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.","units":{"USD":[{"start":"2016-01-01","end":"2016-12-31","val":20000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-09-30","val":176000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":2000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":155000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":155000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-09-30","val":178000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":426000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":436000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":436000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":-68000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":0,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":4924000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":4924000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":4924000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":3662000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":3662000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":3662000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":3662000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":0,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":3662000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":3662000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":0,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":6576000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":6576000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":0,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":0,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":0,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":0,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":0,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":0,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":0,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":0,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":0,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":0,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":10000000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":890000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":830000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":0,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":0,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":-830000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"IncreaseDecreaseInAccountsPayableAndAccruedLiabilities":{"label":"Increase (Decrease) in Accounts Payable and Accrued Liabilities","description":"The increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received and the amount of obligations and expenses incurred but not paid.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":247000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-09-30","val":183000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":313000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":313000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-374000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-288000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":-288000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":324000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":324000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":108000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":108000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":108000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":280000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":280000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":881000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":881000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":1725000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":1725000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":2302000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":2302000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":2302000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":37000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":37000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":3074000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":3074000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":6179000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":6179000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":6089000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":6089000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":6089000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-1969000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-1969000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-1928000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":-1928000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":536000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":536000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":606000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":606000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":606000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":-3202000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":-3202000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-1697000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":-1697000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":1732000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":1732000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":595000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":595000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":595000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-647000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":-647000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":1725000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":1725000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":3950000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":3950000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":5809000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":5809000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":5809000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":-3767000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":-3767000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":-1090000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":-1090000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":1575000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":1575000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":-4270000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":-4270000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":-4270000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":-3802000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":-3802000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":911000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":911000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":37000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":37000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":3387000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":3387000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":3387000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-7292000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":-7292000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-1462000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":-1462000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":-559000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":-559000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":-2334000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":-2334000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":-2334000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-4738000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":-4738000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-2102000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":-2102000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":-3471000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":-3471000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":-3161000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":-3161000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":-3161000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":-6358000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":-6358000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":-1400000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":-1400000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":-984000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":-984000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":-207000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":-207000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":-207000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-4983000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":-4983000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":502000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":502000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":-955000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":-955000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":-3159000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":-3159000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":-3159000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-5977000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":-5977000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-3068000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":-3068000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-01-01","end":"2023-09-30","val":-983000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":-983000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":3807000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":3807000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-3201000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":-3236000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":-2243000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":-2243000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":-2623000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":-2623000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-01-01","end":"2024-12-31","val":663000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":-6607000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":3410000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":-2446000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"IncreaseDecreaseInAccountsReceivable":{"label":"Increase (Decrease) in Accounts Receivable","description":"The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-09-30","val":42000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":47000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":47000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-29000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-5000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":-5000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":76000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":76000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":256000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":256000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":273000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":21000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":21000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":190000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":190000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":36000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":36000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":368000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":420000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":420000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":307000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":340000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":978000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":1149000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":1322000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":1461000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":1312000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":1312000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":1312000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":1303000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":1303000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":1718000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":1718000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":1587000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":1587000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":1817000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":1817000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":1817000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":1019000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":1019000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":976000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":976000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":1021000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":1021000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":1126000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":1126000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":1126000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":773000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":773000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":1567000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":1567000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":2656000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":2656000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":2128000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":2128000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":2128000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":340000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":340000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":1524000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":1524000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":2245000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":2245000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":1810000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":1810000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":1810000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":1000000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":1000000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":1854000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":1854000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":1744000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":1744000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":1801000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":1801000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":1801000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-85000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":-85000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":1517000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":1517000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":2164000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":2164000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":1548000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":1548000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":1548000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":430000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":430000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-43000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":-43000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":566000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":566000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":3456000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":3456000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":3456000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":-349000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":-349000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":-791000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":-791000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":1898000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":1898000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":-1390000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":-1390000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":-1363000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-2937000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":-2937000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":175000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":175000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":-2403000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":-2403000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":-2589000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":-2589000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":-1582000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":402000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":402000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":409000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":560000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-01-01","end":"2023-09-30","val":104000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":410000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":575000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":830000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-453000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":-114000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":370000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":370000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":194000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":1224000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-01-01","end":"2024-12-31","val":-1169000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":521000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":217000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":293000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"IncreaseDecreaseInAccruedInterestReceivableNet":{"label":"Increase (Decrease) in Accrued Interest Receivable, Net","description":"The increase (decrease) during the reporting period in the amount due from borrowers for interest payments.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":-1001000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":-1001000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":-1001000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015"}]}},"IncreaseDecreaseInDueFromRelatedParties":{"label":"Increase (Decrease) in Due from Related Parties","description":"The increase (decrease) during the reporting period in receivables to be collected from other entities that could exert significant influence over the reporting entity.","units":{"USD":[{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2016-01-01","end":"2016-03-31","val":141000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":141000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":269000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":269000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1"}]}},"IncreaseDecreaseInDueToRelatedParties":{"label":"Increase (Decrease) in Due to Related Parties","description":"The increase (decrease) during the reporting period in the aggregate amount of obligations to be paid to the following types of related parties: a parent company and its subsidiaries; subsidiaries of a common parent; an entity and trust for the benefit of employees, such as pension and profit-sharing trusts that are managed by or under the trusteeship of the entities' management; an entity and its principal owners, management, or member of their immediate families; affiliates; or other parties with the ability to exert significant influence.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":355000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-09-30","val":5000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":312000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":312000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-301000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-372000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":-372000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":-378000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":-378000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":-295000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":-295000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":-295000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-10000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":-10000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":63000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":63000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":-13000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":-13000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":4000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":4000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":4000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":-21000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":-21000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-21000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":-21000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":-21000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":-21000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":-21000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":-21000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":-21000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":30000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":30000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":33000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":33000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":1000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":1000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":59000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":59000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":59000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-41000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":-41000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":-8000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":-8000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":-4000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":-4000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":-4000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":-28000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":-28000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":-29000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":-29000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":-22000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":-22000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":-29000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":-29000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":-29000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":21000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":21000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":13000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":13000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":39000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":39000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":10000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":10000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":10000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":53000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":53000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":19000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":19000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":8000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":8000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":1606000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":1606000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":1926000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":1926000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":2390000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":2390000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":182000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":182000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":-1637000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":2223000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":2223000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":-1601000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":-1601000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":-726000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":-726000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-03-31","val":1978000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":1978000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":3753000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":3753000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":1201000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":1201000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-03-31","val":592000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":3884000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-09-30","val":3555000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"}]}},"IncreaseDecreaseInOtherOperatingLiabilities":{"label":"Increase (Decrease) in Other Operating Liabilities","description":"Amount of increase (decrease) in operating liabilities classified as other.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":19000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":19000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-8000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":4000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":4000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":247000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":247000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":565000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":565000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":565000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":305000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":305000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":558000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":558000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":568000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":568000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":2105000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":2105000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":2105000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":1342000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":1342000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":2091000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":2091000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":2616000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":2616000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":3132000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":3132000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":3132000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":2564000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":2564000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":1982000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":1982000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":2392000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":2392000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":2711000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":2711000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":2711000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":371000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":371000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":253000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":253000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":201000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":201000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":975000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":975000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":975000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":178000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":178000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":1010000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":1010000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":2700000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":2700000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":2465000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":2465000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":2465000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":1381000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":1381000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":294000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":294000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":261000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":261000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":-4721000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":-4721000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":-4721000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":15000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":15000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":388000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":388000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":409000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":409000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":-478000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":-478000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":-478000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-599000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":-599000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-383000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":-383000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":-97000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":-97000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":386000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":386000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":386000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":1615000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":1615000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-90000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":-90000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":-142000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":-142000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":641000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":641000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":641000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":220000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":220000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":749000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":749000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":-190000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":-190000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":-1716000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":-1716000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":-1716000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-353000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":-353000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":668000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":668000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":-1379000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":-1379000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":9764000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":10748000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":4973000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":3355000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-09-30","val":3894000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":-4601000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023"}]}},"IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets":{"label":"Increase (Decrease) in Prepaid Expense and Other Assets","description":"Amount of increase (decrease) in prepaid expenses, and assets classified as other.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-09-30","val":11000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":438000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":438000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-501000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-478000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":-478000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":-231000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":-231000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":207000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":207000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":207000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":687000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":687000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":1218000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":1218000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":2092000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":2092000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":1979000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":1979000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":1979000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":1237000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":1237000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":1878000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":1878000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":2642000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":2642000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":2299000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":2299000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":2299000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":2616000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":2616000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":5296000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":5296000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":6170000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":6170000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":8314000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":8314000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":7479000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":961000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":2400000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":3769000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":4963000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":4449000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":5957000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":6683000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":7884000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":7884000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":3970000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":3970000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":4883000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":4883000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":7255000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":7255000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":8498000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":8498000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":8498000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":3396000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":3396000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":3618000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":3618000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":6368000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":6368000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":5995000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":5995000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":5995000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":1900000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":1900000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":3606000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":3606000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":5901000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":5901000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":7375000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":7375000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":7375000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":1925000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":1925000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":2716000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":2716000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":4527000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":4527000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":5137000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":5137000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":5137000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":2010000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":2010000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":1570000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":1570000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":2286000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":2286000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":2465000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":2465000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":2465000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":1857000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":1857000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":1206000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":1206000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":4371000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":4371000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":1670000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":1670000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":1670000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":3355000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":3355000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":1150000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":1150000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":3010000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":3010000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":2069000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":2069000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":3599000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":2967000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":2931000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":3120000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":3448000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-01-01","end":"2023-09-30","val":3232000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":3610000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":3271000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":3436000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-1286000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":-1286000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":1802000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":1802000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":2007000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":2007000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-01-01","end":"2024-12-31","val":-1146000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":2071000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":912000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":-659000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"IncreaseDecreaseInRestrictedCash":{"label":"Increase (Decrease) in Restricted Cash","description":"The net cash inflow or outflow for the increase (decrease) associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities.","units":{"USD":[{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-09-30","val":4643000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-12-31","val":4643000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":515000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":515000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":842000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":1867000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":2726000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":2926000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":2926000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":2926000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":159000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":159000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":753000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":753000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":926000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":926000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":1184000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":1184000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":1184000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":621000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":621000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":892000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":892000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":1162000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":1162000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":1258000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":1258000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":1258000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":21000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":134000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-09-30","val":134000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-12-31","val":134000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":134000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020"}]}},"IncreaseDecreaseInRestrictedCashForOperatingActivities":{"label":"Increase (Decrease) in Restricted Cash for Operating Activities","description":"The net cash inflow or outflow for the increase (decrease) associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as operating activities. This may include cash restricted for regulatory purposes.","units":{"USD":[{"start":"2015-01-01","end":"2015-03-31","val":-1439000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-1194000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":-1508000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-03-31","val":659000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":895000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-09-30","val":958000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"}]}},"IncreaseInRestrictedCash":{"label":"Increase in Restricted Cash","description":"Amount of cash outflow associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities.","units":{"USD":[{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-03-31","val":700000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":1483000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-09-30","val":1511000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"}]}},"InterestAndDividendIncomeSecurities":{"label":"Interest and Dividend Income, Securities, Operating","description":"Amount of operating dividend and interest income, including amortization and accretion of premiums and discounts, on securities.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":53000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":53000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":53000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":431000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":431000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":669000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":669000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":237000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":237000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":855000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":855000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":186000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":186000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":926000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":926000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":926000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":35000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":56000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":20000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":86000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":30000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":91000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":91000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":91000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-12-31","val":110000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":110000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":110000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":160000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-12-31","val":1782000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":1782000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":2018000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018"}]}},"InterestAndDividendIncomeSecuritiesAvailableForSale":{"label":"Interest and Dividend Income, Securities, Operating, Available-for-sale","description":"Amount of operating dividend and interest income, including amortization and accretion of premiums and discounts, on available-for-sale securities.","units":{"USD":[{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":0,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":489000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":489000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":489000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":489000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":1505000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":1505000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":1015000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":1015000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":2531000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":2531000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":2500000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":1051000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":1051000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":2260000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":2260000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":1209000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":1209000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":5146000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":5146000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":2885000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":2885000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":6002000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":6000000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":6000000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":1776000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":1776000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":2119000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":343000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":4414000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":2296000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":5800000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":5800000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":1479000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-12-31","val":5300000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020"}]}},"InterestAndDividendIncomeSecuritiesHeldToMaturity":{"label":"Interest Income, Debt Securities, Held-to-maturity","description":"Amount of operating interest income, including amortization and accretion of premiums and discounts, on held-to-maturity securities.","units":{"USD":[{"start":"2016-01-01","end":"2016-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2017-01-01","end":"2017-03-31","val":160000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":760000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":760000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":601000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":601000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":1271000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":1271000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":511000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":511000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":1782000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":501000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":501000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":1012000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":1012000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":511000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":511000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":1525000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":1525000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":513000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":513000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":2018000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":2018000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":369000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":369000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":369000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":369000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":369000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":369000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":369000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":369000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":369000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021"}]}},"InterestAndFeeIncomeLoansCommercial":{"label":"Interest and Fee Income, Loans, Commercial","description":"Interest and fee income related to commercial loans including industrial and agricultural, real estate (commercial and residential, construction and development), trade financing, and lease financing.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":131000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-09-30","val":311000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":32000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":311000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":311000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-09-30","val":196000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":196000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":1202000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":1202000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":1202000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":1064000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":1064000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":2670000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":2670000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":1606000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":1606000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":7630000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":7630000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":4960000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":4960000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":8248000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":8248000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":8248000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":605000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":605000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":1217000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":1217000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":612000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":612000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":1969000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":1969000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":752000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":752000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":2752000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":2752000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":2752000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":766000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":766000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":1540000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":1540000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":774000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":774000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":1540000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":1540000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":1540000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":1540000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":3655000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":3655000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":3655000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":3655000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016"}]}},"InterestAndFeeIncomeLoansCommercialRealEstate":{"label":"Interest and Fee Income, Loans, Commercial, Real Estate","description":"Interest and fee income generated from loans secured by commercial properties. Examples of properties commonly securing commercial real estate loans may include office buildings, apartment buildings, shopping centers, industrial property, and hotels.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-04-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-07-01","end":"2010-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":131000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":131000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":206000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":279000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":279000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":73000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-04-01","end":"2011-06-30","val":73000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":311000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":311000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":32000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-07-01","end":"2011-09-30","val":32000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":311000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":311000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":311000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":231000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":231000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":231000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":231000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":1708000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":1708000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":1708000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":1529000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":1529000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":3726000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":3726000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":2198000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":2198000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":9552000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":9552000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":5826000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":5826000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":10276000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":10276000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":10276000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":712000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":712000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":1429000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":1429000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":717000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":717000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":2377000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":2377000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":948000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":948000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":3366000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":3366000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":3366000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":975000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":975000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":1968000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":1968000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":993000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":993000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":1968000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":1968000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":1968000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":1968000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":1968000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":3655000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":3655000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":3655000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":3655000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":3655000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":3655000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":3655000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":3655000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":3655000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018"}]}},"InterestCostsCapitalized":{"label":"Interest Costs Capitalized","description":"Amount of interest capitalized during the period.","units":{"USD":[{"start":"2013-01-01","end":"2013-03-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":2718000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":2718000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":2718000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":542000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":542000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":1009000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":1009000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":500000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":500000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":1467000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":1467000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":500000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":500000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":1987000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":1987000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":1987000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":522000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":522000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":992000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":992000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":500000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":500000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":1476000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":1476000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":500000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":500000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":1856000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":1856000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":1856000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":458000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":458000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":952000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":952000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":500000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":500000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":1478000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":1478000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":500000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":500000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":2025000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":2025000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":2025000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":564000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":564000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":1142000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":1142000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":600000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":1732000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":1732000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":600000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":2339000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":2339000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":2339000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":650000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":650000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":1282000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":1282000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":1916000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":1916000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":2565000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":2565000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":2339000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":694000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":694000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":1389000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":1389000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":2079000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":2079000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":2739000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":2565000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":2565000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":901000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":901000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":1656000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":1656000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":2368000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":2368000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":2923000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":2923000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":2923000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":559000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":559000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":1104000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-09-30","val":1579000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":1579000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":500000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":2055000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":2055000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":2055000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":479000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":479000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":1026000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":1703000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":1703000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":2529000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":2529000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":2529000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":850000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":850000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":1743000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":1743000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-01-01","end":"2023-09-30","val":2729000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":2729000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":3748000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":3748000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":1062000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":1062000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":2186000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":2186000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":3474000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":3474000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-01-01","end":"2024-12-31","val":4519000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":376000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":957000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":1552000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"InterestExpense":{"label":"Interest Expense","description":"Amount of the cost of borrowed funds accounted for as interest expense.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-07-01","end":"2010-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":28000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":28000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":28000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-07-01","end":"2011-09-30","val":28000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":313000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":281000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":281000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":704000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":629000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":1347000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":1195000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":642000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":567000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":1918000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":1691000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":572000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":495000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":2199000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":2199000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":2199000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":736000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":736000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":1693000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":1693000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":957000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":957000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":3458000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":3435000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":1765000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":1742000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":2706000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":2706000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":2706000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":3433000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":3433000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":8028000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":8028000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":4595000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":4595000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":11805000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":11805000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":3777000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":3777000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":15598000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":15598000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":15598000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":3911000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":3911000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":7769000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":7769000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":3857000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":3857000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":11292000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":11292000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":3524000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":3524000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":14986000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":14986000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":14986000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":5176000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":5176000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":12362000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":12362000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":7185000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":7185000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":20354000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":20354000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":7992000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":7992000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":29249000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":29249000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":29249000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":9386000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":9386000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":19709000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":19709000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":10324000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":10324000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":29327000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":29327000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":9618000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":9618000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":37149000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":37149000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":37149000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":6591000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":6591000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":14410000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":14410000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":7819000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":7819000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":22814000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":22814000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":8404000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":8404000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":31054000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":31054000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":31054000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":7168000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":7168000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":14417000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":14417000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":7249000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":7249000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":21776000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":21776000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":7359000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":7359000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":28849000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":28849000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":28849000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":6796000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":6796000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":12781000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":12781000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":5985000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":5985000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":19055000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":19055000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":6274000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":6274000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":29138000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":29138000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":29138000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":9941000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":9941000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":20618000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":20618000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":10680000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":10680000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":30713000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":30713000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":10092000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":10092000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":40510000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":40510000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":40510000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":9563000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":9563000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":20343000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":20343000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":10780000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":10780000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":33319000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":33319000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":12976000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":12976000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":48130000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":48130000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":16031000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":16031000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":31819000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":31800000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":15788000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":15800000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":49747000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":17928000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":68216000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":16773000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":34800000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":18000000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2"}]}},"InterestPaid":{"label":"Interest Paid, Including Capitalized Interest, Operating and Investing Activities","description":"Amount of cash paid for interest, including, but not limited to, capitalized interest and payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount; classified as operating and investing activities.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":28000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":28000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":118000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":118000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":118000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":785000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":785000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":1206000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":1206000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":1866000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":1866000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":2073000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":2073000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":2073000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":631000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":631000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":1396000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":1396000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":2709000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":2709000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":1635000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":1635000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":1635000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":2238000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":2238000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":5989000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":5989000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":9158000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":9158000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":12258000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":12258000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":12258000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":3178000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":3178000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":6334000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":6334000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":9261000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":9261000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":12265000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":12265000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":12265000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":3584000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":3584000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":7080000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":7080000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":16146000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":16146000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":20759000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":20759000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":10390000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":10390000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":16257000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":16257000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":27732000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":27732000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":32688000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":8460000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":8460000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":12247000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":12247000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":22485000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2019-01-01","end":"2019-03-31","val":9127000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":13156000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"}]}},"InterestPaidNet":{"label":"Interest Paid, Excluding Capitalized Interest, Operating Activities","description":"Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.","units":{"USD":[{"start":"2016-01-01","end":"2016-12-31","val":20759000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":32688000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":32688000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-09-30","val":22485000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":27029000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":27029000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":27029000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":9127000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":13156000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":21981000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":21981000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":25703000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":25703000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":25703000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":8184000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":8184000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":11367000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":11367000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":18945000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":18945000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":23765000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":23765000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":23765000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":11227000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":11227000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":17571000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":17571000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":29220000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":29220000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":34240000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":34240000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":34240000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":10950000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":10950000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":15446000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":15446000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":29839000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":29839000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":38663000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":38663000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":38663000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":16458000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":16458000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":27379000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":27379000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-01-01","end":"2023-09-30","val":44488000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":44488000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":58884000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":58884000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":16095000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":16095000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":30490000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":30490000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":49136000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":49136000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-01-01","end":"2024-12-31","val":60399000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":19055000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":25968000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":46762000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"InterestPayableCurrentAndNoncurrent":{"label":"Interest Payable","description":"Amount of interest payable on debt, including, but not limited to, trade payables.","units":{"USD":[{"end":"2011-12-31","val":200000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":200000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":200000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-06-30","val":200000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":1000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":3000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":3000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":3000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":3000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":3000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":100000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":200000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":400000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":500000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":500000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":500000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":500000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":500000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":1100000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":1200000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":1100000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":1200000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":1200000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":1200000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":1200000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":1200000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":1200000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":1100000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":1100000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":1200000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":1200000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":1200000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":1200000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":1200000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":2000000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":4700000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":2500000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":5300000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":5300000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":5300000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":5300000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":5300000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":2900000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":6000000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":3000000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":5100000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":5100000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":5100000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":5100000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":5100000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":2400000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":5400000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":2600000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":5200000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":5200000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":5200000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":5200000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":5200000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":2300000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":4700000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":2300000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":4800000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":4800000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":4800000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":4800000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":4800000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":2500000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":4500000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":2300000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":6200000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":6200000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":6200000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":6200000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":6200000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":3600000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-09-30","val":3300000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":6600000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":6600000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":6600000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":6600000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":6600000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":3600000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":7900000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":5200000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":9100000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":9100000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":9100000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":9100000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":9100000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":6200000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":9300000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":7600000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":9000000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":9000000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":9000000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":9000000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":9000000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":7300000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":8500000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":7900000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":11000000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":11000000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":11000000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":11000000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":6200000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":13800000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":10400000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"InvestmentIncomeDividend":{"label":"Investment Income, Dividend","description":"Amount of dividend income on nonoperating securities.","units":{"USD":[{"start":"2017-01-01","end":"2017-12-31","val":2531000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":6002000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":6002000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-06-30","val":2119000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":343000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":4414000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":2296000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":6099000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":6099000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":6099000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":1479000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":2353000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":2353000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":874000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":874000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":5339000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":5339000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":2986000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":2986000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":6273000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":6273000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":6273000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":2753000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":2753000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":3504000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":3504000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":751000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":751000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":6693000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":6693000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":3189000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":3189000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":9658000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":9658000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":9658000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":2387000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":2387000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":3206000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":3206000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":819000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":819000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":5354000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":5354000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":2148000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":2148000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":5591000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":5591000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":1998000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":1998000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":2110000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":2110000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":113000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":113000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":3795000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":3795000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":1685000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":1685000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":3880000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":78000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":81000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":3000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":81000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":0,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3"}]}},"InvestmentIncomeInterest":{"label":"Investment Income, Interest","description":"Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":4000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-04-01","end":"2010-06-30","val":4000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":12000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-07-01","end":"2010-09-30","val":8000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":18000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":18000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":16000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":50000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":50000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":34000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-04-01","end":"2011-06-30","val":34000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":95000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":95000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":45000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-07-01","end":"2011-09-30","val":45000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":117000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":117000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":117000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":20000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":20000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":46000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":46000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":26000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":26000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":63000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":63000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":17000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":17000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":97000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":97000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":97000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":30000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":30000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":45000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":45000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":14000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":14000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":49000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":49000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":5000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":5000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":62000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":62000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":62000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":3000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":3000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":5000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":5000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":2000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":2000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":15000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":15000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":10000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":10000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":22000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":22000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":22000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":7000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":7000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":14000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":14000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":6000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":6000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":21000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":21000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":7000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":7000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":18000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":18000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":18000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":5000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":5000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":15000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":15000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":11000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":11000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":22000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":22000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":7000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":7000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":44000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":44000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":44000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":25000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":25000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":196000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":196000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":171000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":171000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":536000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":536000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":340000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":340000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":1105000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":1105000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":1105000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":930000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":930000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":1349000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":1349000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":419000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":419000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":1602000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":1602000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":253000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":253000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":1884000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":1884000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":1884000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":690000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":690000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":1327000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":1327000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":636000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":636000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":1862000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":1862000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":536000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":536000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":2120000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":2120000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":2120000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":270000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":270000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":277000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":277000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":7000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":7000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":297000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":297000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":19000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":19000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":348000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":348000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":348000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":45000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":45000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":94000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":94000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":48000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":48000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":148000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":148000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":55000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":55000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":194000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":194000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":221000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":46000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":46000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":94000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":94000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":48000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":48000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":155000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":155000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":61000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":61000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":228000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":228000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":204000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":204000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":1216000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":1216000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":1012000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":1012000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":1855000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":1855000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":639000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":639000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":2907000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":455000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":738000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":283000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":1117000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":379000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3"}]}},"InvestmentOwnedBalanceShares":{"label":"Investment Owned, Balance, Shares","description":"Balance held at close of period in number of shares.","units":{"shares":[{"end":"2018-12-31","val":61533775,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q4I"},{"end":"2019-09-30","val":60403796,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":67354922,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":67354922,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":67354922,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":67354922,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":69144899,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":69784521,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":70897649,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":72641101,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":72641101,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":72641101,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":72641101,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":72641101,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":71693526,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":71693526,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":71693526,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":71693526,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":71693526,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q4I"},{"end":"2022-03-31","val":71693526,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"}]}},"LeaseIncome":{"label":"Lease Income","description":"Amount of lease income from operating, direct financing, and sales-type leases. Includes, but is not limited to, variable lease payments, interest income, profit (loss) recognized at commencement, and lease payments paid and payable to lessor.","units":{"USD":[{"start":"2017-01-01","end":"2017-12-31","val":129265000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":82746000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":81363000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019"}]}},"LessorOperatingLeasePaymentsToBeReceived":{"label":"Lessor, Operating Lease, Payments to be Received","description":"Amount of lease payments to be received by lessor for operating lease.","units":{"USD":[{"end":"2019-03-31","val":336147000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":362630000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":367983000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":282050000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-03-31","val":307137000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":298874000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":294394000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":386276000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-03-31","val":365063000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":291172000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":298671000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":286622000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":279268000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":271384000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":274894000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":284580000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-03-31","val":264300000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":260989000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":250147000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":257085000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-03-31","val":246280000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":266493000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":255080000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":247289000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"},{"end":"2025-03-31","val":238318000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":231998000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":186646000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"LessorOperatingLeasePaymentsToBeReceivedFiveYears":{"label":"Lessor, Operating Lease, Payment to be Received, Year Five","description":"Amount of lease payment to be received by lessor for operating lease in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2019-03-31","val":36847000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":41922000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":44360000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":30396000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-03-31","val":34691000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-12-31","val":39223000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-12-31","val":24672000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-12-31","val":26146000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-12-31","val":25035000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-12-31","val":25422000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"}]}},"LessorOperatingLeasePaymentsToBeReceivedFourYears":{"label":"Lessor, Operating Lease, Payment to be Received, Year Four","description":"Amount of lease payment to be received by lessor for operating lease in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2019-03-31","val":42233000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":49585000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":52139000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":35871000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-03-31","val":40287000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":35962000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":36856000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":49623000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-03-31","val":39294000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":33358000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":35726000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":36486000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":26872000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":27742000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":30074000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":33929000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-03-31","val":25276000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":26894000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":28563000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":31985000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-03-31","val":25268000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":29428000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":30244000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":31510000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"},{"end":"2025-03-31","val":26291000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":26816000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":23602000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths":{"label":"Lessor, Operating Lease, Payment to be Received, Year One","description":"Amount of lease payment to be received by lessor for operating lease in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2019-12-31","val":53396000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-06-30","val":55750000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":57171000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":79472000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-03-31","val":69001000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":59177000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":61448000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":61920000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":55716000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":56342000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":59457000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":61327000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-03-31","val":58140000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":58854000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":58322000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":59242000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-03-31","val":52655000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":56600000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":56831000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":57846000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"},{"end":"2025-03-31","val":48678000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":47380000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":39754000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear":{"label":"Lessor, Operating Lease, Payment to be Received, Remainder of Fiscal Year","description":"Amount of lease payment to be received by lessor for operating lease in remainder of current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2019-03-31","val":40401000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":31069000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":16218000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2020-03-31","val":40750000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":27533000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":14056000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2021-03-31","val":59224000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":32207000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":16095000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2022-03-31","val":46626000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":30337000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":15105000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2023-03-31","val":45637000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":31253000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":15632000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2024-03-31","val":43817000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":29761000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":15100000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2025-03-31","val":43272000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":25507000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":10444000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"LessorOperatingLeasePaymentsToBeReceivedThereafter":{"label":"Lessor, Operating Lease, Payment to be Received, after Year Five","description":"Amount of lease payment to be received by lessor for operating lease after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2019-03-31","val":114555000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":121282000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":133092000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":67980000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-03-31","val":88180000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-12-31","val":90255000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-12-31","val":62638000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-12-31","val":57434000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-12-31","val":48942000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-03-31","val":52730000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-12-31","val":46006000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"},{"end":"2025-03-31","val":46962000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"}]}},"LessorOperatingLeasePaymentsToBeReceivedThreeYears":{"label":"Lessor, Operating Lease, Payment to be Received, Year Three","description":"Amount of lease payment to be received by lessor for operating lease in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2019-03-31","val":48885000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":57091000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":59388000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":44112000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-03-31","val":48656000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":41525000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":42545000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":58033000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-03-31","val":49699000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":42938000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":45750000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":46787000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":38581000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":39743000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":43184000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":47651000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-03-31","val":33165000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":34938000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":36116000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":39590000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-03-31","val":32078000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":36444000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":37339000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":39135000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"},{"end":"2025-03-31","val":32630000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":32646000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":29378000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"LessorOperatingLeasePaymentsToBeReceivedTwoYears":{"label":"Lessor, Operating Lease, Payment to be Received, Year Two","description":"Amount of lease payment to be received by lessor for operating lease in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2019-03-31","val":53226000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":61681000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":62786000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":50295000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-03-31","val":54573000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":49710000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":50817000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":69670000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-03-31","val":57401000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":50224000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":53140000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":54119000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":49067000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":50498000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":54145000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":58093000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-03-31","val":47037000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":48673000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":49012000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":52291000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-03-31","val":39732000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":44974000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":45633000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":47370000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"},{"end":"2025-03-31","val":40485000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":39496000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":35102000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"Liabilities":{"label":"Liabilities","description":"Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.","units":{"USD":[{"end":"2010-12-31","val":1346000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":1346000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":1346000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":981000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":5740000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":66628000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":66628000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":66628000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":66628000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":66628000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":62553000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":53578000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":38379000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":44625000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":44625000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":44625000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":44625000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":44625000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":91042000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":196242000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":229342000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":283879000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":283879000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":283879000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":283879000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":283879000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":509153000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":539586000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":551806000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":562467000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":562467000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":562467000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":562467000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":556266000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":582355000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":570012000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":590274000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":585565000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":585565000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":585565000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":585565000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":585565000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":867523000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":869006000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":981353000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":1014566000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":1014566000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":1014566000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":1014566000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":1014566000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":1082590000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":1102050000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":1054795000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":836073000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":836073000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":836073000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":836073000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":836073000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":723815000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":807001000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":785516000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":711025000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":711025000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":711025000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":711025000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":711025000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":635360000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":715301000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":708095000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":736757000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":736757000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":736757000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":736757000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":736757000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":756697000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":776012000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":818120000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":1182743000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":1182743000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":1182743000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":1182743000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":1182743000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":1207294000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":1218420000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":1100373000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":1084505000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":1084505000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":1084505000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":1084505000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":1084505000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":1066070000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":1136849000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":1130840000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":1142852000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":1142852000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":1142852000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":1142852000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":1142852000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":1131118000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":1078048000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":1136437000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":1124779000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":1124779000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":1124779000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":1124779000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":1124779000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":1027913000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":1090396000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":1017084000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":969153000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":969153000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":969153000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":969153000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":941420000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":984614000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":976358000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"LiabilitiesAndStockholdersEquity":{"label":"Liabilities and Equity","description":"Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any.","units":{"USD":[{"end":"2010-12-31","val":42404000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":42404000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":42404000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":93644000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":129861000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":258463000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":258463000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":258463000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":258463000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":258463000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":290576000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":328400000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":378119000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":537928000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":537928000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":537928000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":537928000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":537928000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":582495000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":687556000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":725551000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":776138000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":776138000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":776138000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":776138000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":776138000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":988924000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":1013056000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":1020270000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":1022514000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":1022514000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":1022514000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":1022514000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":1016313000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":1040737000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":1024887000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":1022340000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":1004214000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":1004214000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":1004214000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":1004214000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":1004214000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":1267496000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":1224271000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":1306090000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":1310116000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":1310116000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":1310116000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":1310116000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":1310116000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":1363676000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":1402502000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":1344353000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":1101574000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":1101574000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":1101574000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":1101574000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":1101574000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":1121823000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":1104454000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":1109499000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":1004989000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":1004989000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":1004989000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":1004989000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":1004989000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":944482000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":1017453000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":1009979000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":1041242000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":1041242000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":1041242000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":1041242000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":1041242000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":1042919000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":1065855000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":1103400000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":1731665000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":1731665000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":1731665000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":1731665000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":1731665000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":1762053000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":1792849000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":1629128000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":1584619000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":1584619000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":1584619000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":1584619000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":1584619000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":1558295000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":1613455000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":1564367000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":1559245000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":1559245000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":1559245000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":1559245000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":1559245000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":1527741000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":1414576000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":1406391000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":1388143000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":1388143000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":1388143000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":1388143000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":1388143000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":1214633000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":1229234000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":1109310000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":1124956000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":1124956000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":1124956000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":1124956000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":1077301000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":1012911000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":884799000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"LiabilitiesAssumed1":{"label":"Liabilities Assumed","description":"The fair value of liabilities assumed in noncash investing or financing activities.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-09-30","val":36000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":32000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":32000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":254000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-09-30","val":85096000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":85096000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":85096000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"LiabilitiesOfAssetsHeldForSale":{"label":"Liabilities of Assets Held-for-sale (Deprecated 2014-01-31)","description":"Liability (such as a mortgage) related to a disposal group that is held for sale and anticipated to be sold in less than one year. The liability is expected to be discharged as part of the plan of sale for the asset.","units":{"USD":[{"end":"2011-12-31","val":4125000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-12-31","val":4340000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2012-12-31","val":4340000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":4340000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":4340000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":4340000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2013-03-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"}]}},"LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation":{"label":"Disposal Group, Including Discontinued Operation, Liabilities","description":"Amount classified as liabilities attributable to disposal group held for sale or disposed of.","units":{"USD":[{"end":"2020-12-31","val":94766000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q4I"},{"end":"2020-12-31","val":94766000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2021-06-30","val":98678000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"}]}},"LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest":{"label":"Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest","description":"Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).","units":{"pure":[{"start":"2012-01-01","end":"2012-06-30","val":0.001,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-09-30","val":0.001,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":0.001,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0.001,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0.001,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-09-30","val":0.001,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-12-31","val":0.001,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0.001,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":0.001,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":0.001,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-12-31","val":0.001,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0.001,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0.001,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-09-30","val":0.001,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-12-31","val":0.001,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0.001,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":0.001,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-09-30","val":0.001,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":0.001,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":0.001,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":0.001,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-09-30","val":0.001,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-12-31","val":0.001,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":0.001,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0.001,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-09-30","val":0.001,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2019-01-01","end":"2019-03-31","val":0.001,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":0.001,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-09-30","val":0.001,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"}]}},"LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest":{"label":"Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest","description":"Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP).","units":{"pure":[{"start":"2012-01-01","end":"2012-06-30","val":0.999,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-09-30","val":0.999,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":0.999,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0.999,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0.999,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-09-30","val":0.999,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-12-31","val":0.999,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0.999,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":0.999,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":0.999,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-12-31","val":0.999,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0.999,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0.999,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-09-30","val":0.999,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-12-31","val":0.999,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0.999,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":0.999,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-09-30","val":0.999,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":0.999,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":0.999,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":0.999,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-09-30","val":0.999,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-12-31","val":0.999,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":0.999,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0.999,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-09-30","val":0.999,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2019-01-01","end":"2019-03-31","val":0.999,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":0.999,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-09-30","val":0.999,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"}]}},"LoansReceivableFairValueDisclosure":{"label":"Loans Receivable, Fair Value Disclosure","description":"Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.","units":{"USD":[{"end":"2013-12-31","val":22000000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":22000000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":22000000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-06-30","val":22000000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":27850000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":27813000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":27813000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q4I"},{"end":"2015-06-30","val":27850000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive":{"label":"Long-Term Debt, Maturity, after Year Five","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2012-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2013-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":6460000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":6280000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"},{"end":"2014-03-31","val":25270000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":25532000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":25792000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":18244000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-03-31","val":18497000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":18753000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":29127000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":28281000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-03-31","val":183268000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":179120000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":183684000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":128156000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-03-31","val":134544000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":138695000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":187388000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":61170000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":60969000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":58467000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":58781000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":5155000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"},{"end":"2019-03-31","val":5155000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":5155000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":5155000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":66770000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-03-31","val":114504000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-12-31","val":41479000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths":{"label":"Long-Term Debt, Maturity, Year One","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2012-06-30","val":18177000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2015-12-31","val":13649000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-12-31","val":402153000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-12-31","val":117537000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-12-31","val":102469000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"},{"end":"2019-12-31","val":137958000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-03-24","val":614200000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-03-24","val":456900000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q1I"},{"end":"2020-06-30","val":386551000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":387178000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":538050000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-03-31","val":389746000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":450778000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":548061000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":511964000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":92224000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":227395000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":368500000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":412338000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-03-31","val":150434000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":213847000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-07-01","val":460100000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2023-09-30","val":271333000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":289025000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-03-31","val":236458000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":268058000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":183574000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":244464000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"},{"end":"2025-03-31","val":469833000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":485919000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":308898000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive":{"label":"Long-Term Debt, Maturity, Year Five","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2012-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2013-06-30","val":147118000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":151164000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":24280000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"},{"end":"2014-03-31","val":80176000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":80176000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":80176000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":7805000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-03-31","val":7804000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":7804000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":812000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":846000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-03-31","val":52508000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":51122000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":134311000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":51241000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-03-31","val":54435000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":56508000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":55787000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":127925000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":127724000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":125227000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":125546000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":52158000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"},{"end":"2019-03-31","val":53662000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":114298000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":115764000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":270000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-03-31","val":24137000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-12-31","val":78011000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-12-31","val":161181000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-12-31","val":53812000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour":{"label":"Long-Term Debt, Maturity, Year Four","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2012-06-30","val":30618000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2013-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":13639000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":178429000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"},{"end":"2014-03-31","val":316592000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":383533000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":394183000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":80972000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-03-31","val":82117000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":82117000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":81181000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":812000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-03-31","val":52473000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":51088000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":53686000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":132876000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-03-31","val":186570000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":189710000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":189922000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":56639000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":145438000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":237616000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":237929000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":127155000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"},{"end":"2019-03-31","val":106851000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":129768000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":131233000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":116132000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-03-31","val":114634000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":24715000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":24990000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":26629000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-03-31","val":76933000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":77570000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":77858000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":141963000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":158690000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":181642000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":273065000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":274629000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-03-31","val":0,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-03-31","val":0,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":25443000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":52508000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":53812000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"},{"end":"2025-03-31","val":52633000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":58033000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree":{"label":"Long-Term Debt, Maturity, Year Three","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2012-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2013-06-30","val":29920000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":30642000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":14991000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"},{"end":"2014-03-31","val":17640000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":18188000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":18208000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":402133000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-03-31","val":430982000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":415600000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":426038000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":81182000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-03-31","val":82255000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":87542000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":90244000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":52251000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-03-31","val":113406000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":158879000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":158157000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":190774000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":190572000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":188742000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":189056000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":272311000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"},{"end":"2019-03-31","val":275773000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":276717000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":278162000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":78396000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-03-31","val":76898000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":115958000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":116587000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":120344000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-03-31","val":25610000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":26246000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":26535000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":108159000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":193229000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":216180000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":249216000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":250779000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-03-31","val":272151000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":268933000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":503364000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":518141000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-03-31","val":0,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":25443000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":52508000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":53812000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"},{"end":"2025-03-31","val":52633000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":58033000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo":{"label":"Long-Term Debt, Maturity, Year Two","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2012-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2013-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":140000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":31751000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"},{"end":"2014-03-31","val":34502000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":2005000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":2006000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":19079000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-03-31","val":14537000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":14555000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":13643000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":426026000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-03-31","val":449008000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":452461000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":484509000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":196253000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-03-31","val":307111000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":417049000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":376228000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":57649000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":57448000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":63350000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":74414000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":104070000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"},{"end":"2019-03-31","val":104932000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":105882000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":107367000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":278554000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-03-31","val":342622000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":78223000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":117595000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":301864000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020Q4I"},{"end":"2021-03-31","val":156875000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":159273000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":160359000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":92224000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021Q4I"},{"end":"2022-03-31","val":105668000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":128767000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":126512000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":128366000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-03-31","val":249283000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":246066000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":249503000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":238655000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-03-31","val":534122000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":528009000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":529356000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":470867000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"},{"end":"2025-03-31","val":52633000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":58033000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear":{"label":"Long-Term Debt, Maturity, Remainder of Fiscal Year","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in remainder of current fiscal year.","units":{"USD":[{"end":"2017-09-30","val":32706000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2018-03-31","val":116680000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":103416000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":64024000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2019-03-31","val":49383000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":41142000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":30399000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2020-03-31","val":31772000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":839000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":507000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2021-03-31","val":443911000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":315026000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":116538000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2022-03-31","val":447827000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":306320000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":49443000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2023-03-31","val":384951000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":264241000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":28471000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2024-03-31","val":180840000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":143293000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":72772000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2025-03-31","val":218259000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":214642000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":568139000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"LossContingencyLossInPeriod":{"label":"Loss Contingency, Loss in Period","description":"The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates.","units":{"USD":[{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-06-30","val":506000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":506000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":506000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":506000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":506000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":506000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":506000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":506000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":-27000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":-27000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022"}]}},"MinimumNetWorthRequiredForCompliance":{"label":"Minimum Net Worth Required for Compliance","description":"The lowest amount of net worth (total assets minus total liabilities) required by secondary market investors or state-imposed regulatory mandates.","units":{"USD":[{"end":"2012-06-30","val":15000000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"}]}},"MinorityInterest":{"label":"Stockholders' Equity Attributable to Noncontrolling Interest","description":"Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest).","units":{"USD":[{"end":"2010-12-31","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-09-30","val":1358000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":13519000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":13519000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":13519000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":13519000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":13519000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":14594000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":14573000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":14533000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":15792000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":15792000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":15792000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":15792000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":15792000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":16264000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":16405000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":14385000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":14864000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":14864000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":14864000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":14864000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":14864000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":16062000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":15787000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":16657000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":16738000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":16738000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":16738000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":16738000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":16738000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":16087000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":17321000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":15966000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":15427000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":15427000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":15427000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":15427000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":15427000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":15071000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":2064000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":1948000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":1898000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":1898000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":1898000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":1898000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":1898000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":1926000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":1896000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":2020000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":1970000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":1970000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":1970000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":1970000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":1970000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":1957000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":2648000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":2589000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":2510000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":2510000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":2510000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":2510000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":2510000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":1462000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":1325000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":874000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":755000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":755000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":755000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":755000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":755000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":835000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":795000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":724000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":13158000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":13158000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":13158000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":13158000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":13158000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":12515000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":12560000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":11392000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":10369000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":10369000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":10369000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":10369000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":10369000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":10251000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":10373000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":2718000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":4092000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":4092000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":4092000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":4092000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":4092000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":3903000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":3284000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":942000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":1215000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":1215000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":1215000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":1215000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":1215000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":1044000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":-617000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":-3134000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":-3139000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":-3139000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":-3139000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":-3139000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":-3262000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":-4132000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":-6272000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders":{"label":"Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders","description":"Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders.","units":{"USD":[{"start":"2012-01-01","end":"2012-09-30","val":24000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":24000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":24000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2012-01-01","end":"2012-12-31","val":24000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-12-31","val":24000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":24000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":24000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":200000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":224000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-09-30","val":2211000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-12-31","val":2237000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":2237000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2013-01-01","end":"2013-12-31","val":2237000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-12-31","val":2237000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":2237000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":2237000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-06-30","val":157000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":157000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-12-31","val":157000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":157000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2014-01-01","end":"2014-12-31","val":157000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-12-31","val":157000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":157000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":157000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":4040000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":4040000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-09-30","val":5971000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-12-31","val":7342000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":7342000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2015-01-01","end":"2015-12-31","val":7342000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-12-31","val":7342000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":7342000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":7342000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-06-30","val":17000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-09-30","val":80000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":80000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":80000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2016-01-01","end":"2016-12-31","val":80000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-12-31","val":80000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":80000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":80000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":7000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":10000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-09-30","val":18000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-12-31","val":22000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":22000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2017-01-01","end":"2017-12-31","val":22000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-12-31","val":22000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":22000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":22000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2019-01-01","end":"2019-03-31","val":1739000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":1739000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":1824000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":1824000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":85000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":85000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":3793000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":3793000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":1969000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":1969000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":3869000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":3869000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":3869000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-09-30","val":28000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":28000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":28000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":28000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":28000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":28000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":28000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":3819000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":3819000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":3819000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-06-30","val":34000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":34000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":34000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":34000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":10663000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":10663000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":10630000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":10630000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":10663000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":10663000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":10663000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-06-30","val":613000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":613000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":613000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":613000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":1094000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":1094000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":481000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":481000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":1094000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":1094000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-06-30","val":271000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":271000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":271000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":271000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":2608000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":2608000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":2337000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":2337000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":2608000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":60000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":245000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":185000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":245000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"MinorityInterestDecreaseFromRedemptions":{"label":"Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests","description":"Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests).","units":{"USD":[{"start":"2016-01-01","end":"2016-03-31","val":741000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":37986000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-09-30","val":37986000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"}]}},"MortgageLoansOnRealEstateCollectionsOfPrincipal":{"label":"Mortgage Loans on Real Estate, Collections of Principal","description":"The amount of principal collected on mortgage loans on real estate during the reporting period.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-03-31","val":-544000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-438000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-06-30","val":-438000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-09-30","val":-438000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-09-30","val":-438000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-12-31","val":-438000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2011-01-01","end":"2011-12-31","val":-438000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":-438000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2012-01-01","end":"2012-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013"}]}},"MortgageLoansOnRealEstateCommercialAndConsumerNet":{"label":"Mortgage Loans on Real Estate, Commercial and Consumer, Net","description":"The balance represents the amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio.","units":{"USD":[{"end":"2010-12-31","val":13227000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":13227000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":13227000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":35651000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":35700000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":71034000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":71906000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":71906000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":71906000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":71906000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":71906000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":94412000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":95430000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":21787000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":21893000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":21893000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":21893000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":21893000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":21893000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":22000000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":22000000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":27216000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":27422000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":27422000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":27422000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":27422000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":27422000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":27631000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":27850000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":27850000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":27850000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":27850000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":27850000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":27850000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":27850000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":27850000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"}]}},"MortgageLoansOnRealEstateFaceAmountOfMortgages":{"label":"Mortgage Loans on Real Estate, Face Amount of Mortgages","description":"Amount of the contractual principal due at the origination of the mortgage loan (face amount).","units":{"USD":[{"end":"2011-12-31","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-06-30","val":54500000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":91448000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":92334000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":92334000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":92334000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":92334000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":92334000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":114326000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":114778000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":22000000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":22000000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":22000000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":22000000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":22000000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":22000000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":22000000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":22000000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":27850000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":27850000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":27850000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":27850000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":27850000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":27850000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":27850000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":27850000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":27850000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":27850000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":27850000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":27850000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":27850000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":27850000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":27850000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"}]}},"MortgageLoansOnRealEstateNewMortgageLoans":{"label":"SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, New Mortgage Loan","description":"Amount of increase in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, from new investment.","units":{"USD":[{"start":"2012-01-01","end":"2012-06-30","val":54500000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-09-30","val":107083000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":107083000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":22000000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":22000000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-09-30","val":22000000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-12-31","val":22000000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":5850000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014"}]}},"NetCashProvidedByUsedInFinancingActivities":{"label":"Net Cash Provided by (Used in) Financing Activities","description":"Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":12661000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-09-30","val":22354000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":42906000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":42906000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":15414000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":53985000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":53985000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":90866000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":90866000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":220649000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":220649000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":220649000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":33157000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":33157000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":72642000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":72642000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":123776000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":123776000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":282683000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":282683000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":282683000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":38848000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":38848000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":139395000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":139395000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":153939000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":153939000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":197281000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":197281000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":197281000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":191143000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":191143000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":221032000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":221032000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":229970000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":229970000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":235461000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":235461000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":235461000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":18198000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":18198000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-3555000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":-3555000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":-15157000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":-15157000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":-25083000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":-25083000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":-25083000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":255806000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":260942000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":217335000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":222471000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":296311000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":301656000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":311875000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":311875000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":311875000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":44118000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":44118000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":41310000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":41310000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":85008000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":85008000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":-374634000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":-374634000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":-374634000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":43931000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":43931000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":22747000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":22747000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":-12013000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":-12013000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":-126875000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":-126875000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":-126875000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-54403000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":-54403000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":14977000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":14977000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":-383000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":-383000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":-41555000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":-41555000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":-41555000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":29788000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":29788000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":40327000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":40327000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":41845000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":41845000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":35952000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":35952000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":35952000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":36048000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":36048000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":23971000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":23971000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":-112929000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":-112929000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":-161748000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":-161748000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":-161748000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-13965000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":-13965000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":66620000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":66620000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":-37278000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":-37278000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":-61062000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":-61062000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":-61062000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-3843000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":-3843000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-60178000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":-60178000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-01-01","end":"2023-09-30","val":4601000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":4601000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":-25133000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":-25133000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-89262000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":-89262000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":-22440000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":-22440000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":-104837000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":-104837000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-01-01","end":"2024-12-31","val":-183599000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":-16624000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":-16966000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":-24642000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"NetCashProvidedByUsedInInvestingActivities":{"label":"Net Cash Provided by (Used in) Investing Activities","description":"Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-09-30","val":-10622000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":-17885000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":-17885000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-19912000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-20206000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":-20206000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":-27696000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":-27696000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":-154405000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":-154405000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":-154405000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-33441000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":-33441000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-22276000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":-22276000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":-142197000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":-142197000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":-242074000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":-242074000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":-242074000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":-89577000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":-89577000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-177288000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":-177288000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":-230438000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":-230438000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":-289875000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":-289875000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":-289875000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-191451000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-191451000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-256573000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":-256573000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":-276106000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":-276106000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":-285814000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":-285814000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":-285795000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":4824000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":4824000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":2394000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":2394000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":-359000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":-359000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":1992000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":6758000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":6758000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-15054000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":-7425000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":-139774000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":-129896000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":-300338000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":-291226000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":-306495000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":-306495000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":-306495000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":-33093000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":-33093000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":2795000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":2795000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":-56124000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":-56124000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":673323000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":673323000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":673323000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":-255865000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":-255865000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-339319000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":-339319000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":-260853000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":-260853000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":-89061000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":-89061000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":-89061000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":49432000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":49432000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-55441000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":-55441000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":-47847000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":-47847000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":-31013000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":-31013000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":-31013000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-15731000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":-15731000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-38315000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":-38315000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":-45890000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":-45890000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":-49554000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":-49554000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":-49554000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":6936000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":6936000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":54428000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":54428000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":193353000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":193353000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":175098000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":175098000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":175098000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":5945000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":5945000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-13968000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":-13968000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":70298000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":70298000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":107551000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":106567000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":106567000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":23905000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":23905000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":27270000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":27270000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-01-01","end":"2023-09-30","val":-19486000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":-19486000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":47770000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":47770000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-11876000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":-11876000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":-39337000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":-39337000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":13053000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":13053000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-01-01","end":"2024-12-31","val":156177000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":-6271000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":-8482000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":20306000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"NetCashProvidedByUsedInOperatingActivities":{"label":"Net Cash Provided by (Used in) Operating Activities","description":"Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":-7000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":-4000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-09-30","val":-849000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":-1572000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":-1572000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-636000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-971000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":-971000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":-1328000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":-1328000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":-3507000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":-3507000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":-3507000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":73000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":73000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-660000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":-660000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":-1773000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":-1773000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":-1028000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":-1028000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":-1028000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":562000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":562000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":4681000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":4681000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":17226000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":17226000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":24630000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":24630000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":24630000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-2931000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-2931000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-1490000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":-1490000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":7311000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":7311000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":11450000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":11450000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":12285000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":2792000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":2792000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":12155000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":12155000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":21784000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":21784000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":27056000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":25855000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":25855000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":1139000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":1798000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":12568000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":13463000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":19068000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":20026000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":26656000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":26656000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":26656000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":3391000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":3391000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":12857000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":12857000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":19725000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":19725000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":13432000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":13432000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":13432000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":-5013000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":-5013000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":568000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":568000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":439000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":439000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":2143000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":2143000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":2143000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-7573000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":-7573000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-3414000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":-3414000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":-2144000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":-2144000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":-4156000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":-4156000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":-4156000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-1520000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":-1520000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":4096000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":4096000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":4806000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":4806000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":-1777000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":-1777000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":-1777000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":-1311000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":-1311000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":8610000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":8610000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":11313000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":11313000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":16028000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":16028000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":16028000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":315000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":315000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":12331000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":12331000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":8660000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":8660000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":10868000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":11852000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":11852000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-10226000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":-10226000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-9406000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":-9406000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-01-01","end":"2023-09-30","val":-10449000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":-10449000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":-24345000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":-24345000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-7398000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":-7398000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":-15760000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":-15760000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":-20668000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":-20668000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-01-01","end":"2024-12-31","val":-30357000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":-12853000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":-8683000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":-23297000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"NetIncomeLoss":{"label":"Net Income (Loss) Attributable to Parent","description":"The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":-7000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":-606000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-04-01","end":"2010-06-30","val":-603000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":-1066000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-07-01","end":"2010-09-30","val":-460000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":-1975000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-12-31","val":-1975000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":-1975000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-703000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2011-01-01","end":"2011-03-31","val":-703000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-2380000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":-2380000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":-1677000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-04-01","end":"2011-06-30","val":-1677000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":-1677000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":-4223000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":-4223000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":-1844000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-07-01","end":"2011-09-30","val":-1844000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":-1842000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":-7581000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":-7581000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":-7581000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2011-10-01","end":"2011-12-31","val":-3359000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4"},{"start":"2012-01-01","end":"2012-03-31","val":-783000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":-783000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-03-31","val":-783000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2012-01-01","end":"2012-03-31","val":-783000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-3492000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":-3492000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":-2709000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":-2710000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-04-01","end":"2012-06-30","val":-2709000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":-2710000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":-6991000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":-6991000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-3499000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-3499000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-07-01","end":"2012-09-30","val":-3499000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-3499000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":-9762000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":-9762000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":-9762000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2012-10-01","end":"2012-12-31","val":-2770000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-10-01","end":"2012-12-31","val":-2770000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4"},{"start":"2013-01-01","end":"2013-03-31","val":1411000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":1411000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-03-31","val":1411000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2013-01-01","end":"2013-03-31","val":1411000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-931000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":-931000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":-2343000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":-2343000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-04-01","end":"2013-06-30","val":-2343000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":-2343000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":6414000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":6414000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":7344000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":7344000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-07-01","end":"2013-09-30","val":7344000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":7344000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":11493000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":11493000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":11493000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2013-10-01","end":"2013-12-31","val":5081000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-10-01","end":"2013-12-31","val":5081000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4"},{"start":"2014-01-01","end":"2014-03-31","val":-9617000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-9617000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-03-31","val":-9617000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2014-01-01","end":"2014-03-31","val":-9617000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-14948000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":-14948000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":-5331000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":-5331000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-04-01","end":"2014-06-30","val":-5331000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":-5331000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":-18315000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":-18315000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":-3367000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":-3367000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-07-01","end":"2014-09-30","val":-3367000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":-3367000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-23194000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":-23194000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":-23194000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2014-10-01","end":"2014-12-31","val":-4879000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-10-01","end":"2014-12-31","val":-4879000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4"},{"start":"2015-01-01","end":"2015-03-31","val":2235000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":2235000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-03-31","val":2235000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2015-01-01","end":"2015-03-31","val":2235000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":3761000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":3761000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":1526000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":1526000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-04-01","end":"2015-06-30","val":1526000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":1526000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":3299000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":3299000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":-462000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":-462000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-07-01","end":"2015-09-30","val":-462000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":-462000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":2444000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":2444000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":2444000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2015-10-01","end":"2015-12-31","val":-922000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-10-01","end":"2015-12-31","val":-922000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4"},{"start":"2016-01-01","end":"2016-03-31","val":-4894000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":-4894000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-03-31","val":-4894000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2016-01-01","end":"2016-03-31","val":-4894000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":-6853000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":-6853000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":-1959000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":-1959000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-04-01","end":"2016-06-30","val":-1959000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":-1959000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":-21804000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":-21804000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":-14951000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":-14951000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-07-01","end":"2016-09-30","val":-14951000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":-14951000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":-28918000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":-28918000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":-28918000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2016-10-01","end":"2016-12-31","val":-7114000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-10-01","end":"2016-12-31","val":-7114000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4"},{"start":"2017-01-01","end":"2017-03-31","val":-9092000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":-9092000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-03-31","val":-9092000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2017-01-01","end":"2017-03-31","val":-9092000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":14754000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":14754000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":23846000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":23846000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-04-01","end":"2017-06-30","val":23846000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":23846000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":4220000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":4220000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":-10534000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":-10534000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-07-01","end":"2017-09-30","val":-10534000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":-10534000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":210644000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":210644000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":210644000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2017-10-01","end":"2017-12-31","val":206424000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-10-01","end":"2017-12-31","val":206424000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4"},{"start":"2018-01-01","end":"2018-03-31","val":-23681000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":-23681000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-03-31","val":-23681000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2018-01-01","end":"2018-03-31","val":-23681000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-13645000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":-13645000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":10036000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":10036000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-04-01","end":"2018-06-30","val":10036000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":10036000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":22852000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":22852000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":36497000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":36497000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-07-01","end":"2018-09-30","val":36497000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":36497000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":33546000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":33546000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":33546000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2018-10-01","end":"2018-12-31","val":10694000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-10-01","end":"2018-12-31","val":10694000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4"},{"start":"2019-01-01","end":"2019-03-31","val":16781000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":16781000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-03-31","val":16781000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":10532000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":10532000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":-6249000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":-6249000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-04-01","end":"2019-06-30","val":-6249000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":11304000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":11304000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":772000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":772000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-07-01","end":"2019-09-30","val":772000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":-17282000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":-17282000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":-17282000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2019-10-01","end":"2019-12-31","val":-28586000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4"},{"start":"2020-01-01","end":"2020-03-31","val":-17972000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":-17972000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-14304000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":-14304000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":3668000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":3668000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":-21797000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":-21797000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":-7493000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":-7493000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-49008000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":-49008000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":-49008000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":6512000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":6512000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":28187000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":28187000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":21675000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":21675000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":3671000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":3671000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":-24516000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":-24516000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":-10955000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":-10955000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":-10955000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-4755000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":-4755000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-13775000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":-13775000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":-9019000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":-44267000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":-44267000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":-30492000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":-30492000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":-43242000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":-43242000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":-43242000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-19581000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":-19581000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-77056000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":-77056000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":-57475000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":-57475000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":-137288000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":-137288000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-60232000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-60232000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":-144151000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":-144151000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-76473000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":-76473000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":-120694000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":-120694000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":-44221000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":-44221000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":-164419000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":-164419000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":-43725000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":-43725000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":-100837000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":-19799000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":-126433000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":-106634000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":-244149000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":-117716000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"NetIncomeLossAttributableToNoncontrollingInterest":{"label":"Net Income (Loss) Attributable to Noncontrolling Interest","description":"Amount of Net Income (Loss) attributable to noncontrolling interest.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-07-01","end":"2010-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":-103000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":-103000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":-103000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-07-01","end":"2011-09-30","val":-103000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":-218000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":-218000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":-218000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":78000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":78000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-21000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":-21000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":-99000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":-99000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":-182000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":-182000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-161000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-161000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":-333000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":-333000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":-333000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":330000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":330000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":244000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":244000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":-86000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":-86000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":160000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":160000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":-84000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":-84000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":96000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":96000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":96000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-277000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-277000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-426000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":-426000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":-149000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":-149000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":-486000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":-486000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":-59000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":-59000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-554000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":-554000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":-554000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":3150000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":3150000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":4263000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":4263000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":1113000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":1113000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":4448000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":4448000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":185000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":185000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":4688000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":4688000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":4688000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-38000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":-38000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":-68000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":-68000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":-30000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":-30000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":-124000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":-124000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":-56000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":-56000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":-208000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":-208000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":-208000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":34000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":34000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":-3000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":-3000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":-37000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":-37000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":-10000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":-10000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":-8000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":-8000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":-64000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":-64000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":-64000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":-21000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":-21000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-64000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":-64000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":-43000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":-43000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":-141000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":-141000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":-76000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":-76000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":-222000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":-222000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":-222000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":679000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":679000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":627000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":627000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":-52000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":-52000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":2145000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":2145000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":1518000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":1518000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":2101000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":2101000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":2101000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-32000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":-32000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-72000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":-72000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":-40000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":-40000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":-115000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":-115000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":-43000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":-43000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-738000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":-738000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":-738000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":-663000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":-663000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":-761000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":-761000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":-98000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":-98000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":-1949000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":-1949000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":-1188000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":-1188000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":-2310000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":-2310000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":-2310000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-118000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":-118000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":38000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":38000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":156000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":156000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":-844000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":-844000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":-881000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":-881000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":530000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":530000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":530000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-189000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":-189000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-195000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":-195000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":-6000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":-6000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":-2506000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":-2506000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-2311000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-2311000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":-2326000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":-2326000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-521000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":-521000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":-1958000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":-1958000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":-1437000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":-1437000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":-3939000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":-3939000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":-1981000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":-1981000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":-4035000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":-63000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":-838000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":-775000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":-3003000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":-2165000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"NetIncomeLossAttributableToRedeemableNoncontrollingInterest":{"label":"Net Income (Loss) Attributable to Redeemable Noncontrolling Interest","description":"Amount of Net Income (Loss) attributable to redeemable noncontrolling interest.","units":{"USD":[{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":-23000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":-23000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":-23000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":-23000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-56000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":-56000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":-32000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":-32000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":-81000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":-81000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":-49000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":-49000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":-113000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":-113000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":-33000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":-33000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":-146000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-47000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-81000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":-34000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":-81000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3"}]}},"NoncashMergerRelatedCosts":{"label":"Noncash Merger Related Costs","description":"Amount of expense (income) related to the increase (decrease) in reserve for business combination costs. Includes, but is not limited to, legal, accounting, and other costs incurred to consummate the merger.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":476000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2010-01-01","end":"2010-12-31","val":476000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012"}]}},"NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1":{"label":"Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed)","description":"\"The net book value of a nonmonetary asset transferred or exchanged in connection with the acquisition of a business or asset in a noncash transaction. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. \"\"Part noncash\"\" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Nonmonetary assets and liabilities are assets and liabilities that will not result in cash receipts or cash payments in the future.\"","units":{"USD":[{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-03-31","val":1693000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":1727000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":207000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":207000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2016-01-01","end":"2016-03-31","val":10855000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":7647000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"}]}},"NotesPayable":{"label":"Notes Payable","description":"Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.","units":{"USD":[{"end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2010-12-31","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2011-09-30","val":3477000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":28877000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2011-12-31","val":33002000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":33002000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":33002000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":33002000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2012-03-31","val":30282000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":30618000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":31576000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":33751000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q4I"},{"end":"2012-12-31","val":33751000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":29411000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2013-03-31","val":73346000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":177038000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"}]}},"NumberOfRealEstateProperties":{"label":"Number of Real Estate Properties","description":"The number of real estate properties owned as of the balance sheet date.","units":{"property":[{"end":"2017-03-31","val":21,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":20,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":20,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"}]}},"NumberOfReportableSegments":{"label":"Number of Reportable Segments","description":"Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.","units":{"property":[{"start":"2021-01-01","end":"2021-06-30","val":3,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-09-30","val":3,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2022-01-01","end":"2022-06-30","val":3,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-09-30","val":3,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":3,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022"},{"start":"2023-01-01","end":"2023-06-30","val":3,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-12-31","val":3,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023"}],"segment":[{"start":"2016-01-01","end":"2016-09-30","val":1,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2017-01-01","end":"2017-06-30","val":1,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-09-30","val":1,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2018-01-01","end":"2018-03-31","val":1,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":1,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-09-30","val":1,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2019-01-01","end":"2019-03-31","val":1,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":1,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-09-30","val":1,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-12-31","val":2,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":2,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":2,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-09-30","val":2,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-12-31","val":3,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":3,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":3,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":3,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":3,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":3,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":3,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":3,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":3,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":3,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":3,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":3,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":3,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":3,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":3,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":3,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":3,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":3,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":3,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":3,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":3,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":3,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":3,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":3,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":3,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":3,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":3,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":3,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":3,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":3,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":3,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":3,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":3,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":3,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":3,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":3,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":3,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":3,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":3,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":3,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":3,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":3,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":3,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":3,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":3,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":3,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":3,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":3,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":3,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":3,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":3,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":3,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":3,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":3,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":3,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}],"segments":[{"start":"2016-01-01","end":"2016-03-31","val":1,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":1,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2017-01-01","end":"2017-03-31","val":1,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1"}]}},"OffMarketLeaseUnfavorable":{"label":"Off-market Lease, Unfavorable","description":"This element represents a liability associated with the acquisition of an off-market lease when the terms of the lease are unfavorable to the market terms for the lease at the date of acquisition.","units":{"USD":[{"end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-12-31","val":437000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":437000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":437000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":437000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":437000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":401000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":368000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":262000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":2031000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":2031000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":2031000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":2031000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":2031000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":3251000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":3011000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":4930000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":4420000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":4420000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":4420000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":4420000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":4420000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":6155000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":5531000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":4956000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":4403000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":4403000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":4403000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":4403000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":4403000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":3909000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":3464000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":3082000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":2735000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":2735000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":2735000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":2735000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":2735000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":2427000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":2602000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":7606000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":6551000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":6551000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":6029000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":6029000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":5088000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":6533000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":4914000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":3751000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":2843000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":2843000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":2843000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":2843000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":2582000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":4379000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":6011000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":5554000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":5005000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":5005000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":4947000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":4947000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":3528000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":4652000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":4980000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":4559000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":3180000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":3180000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":3180000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":3180000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":3180000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":2911000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":2698000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":2504000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":6462000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":6462000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":5797000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":5797000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":5797000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":5902000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":4818000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":4436000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":4080000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":4080000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":4080000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":4080000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q4I"},{"end":"2022-03-31","val":3730000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":3385000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":2986000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"}]}},"OperatingCostsAndExpenses":{"label":"Operating Costs and Expenses","description":"Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense.","units":{"USD":[{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":3836000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":3836000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":3836000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":3390000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":3390000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":9233000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":9233000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":5841000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":5841000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":15715000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":15715000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":6483000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":6483000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":20990000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":20990000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":20990000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":5113000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":5113000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":12109000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":12109000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":6998000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":6998000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":17485000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":17485000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":5377000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":5377000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":19252000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":19252000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":19252000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":1962000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":1962000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":3945000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":3945000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":1984000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":1984000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":5275000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":5275000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":1330000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":1330000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":6944000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":6944000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":1867000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":1867000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":3652000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":3652000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":1784000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":1784000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":5016000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":5016000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":1363000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":1363000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":6874000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":1737000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":3373000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":1637000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":4619000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":1245000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"OperatingIncomeLoss":{"label":"Operating Income (Loss)","description":"The net result for the period of deducting operating expenses from operating revenues.","units":{"USD":[{"start":"2018-01-01","end":"2018-03-31","val":-16782000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-9855000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":6926000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":33404000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":43260000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":53573000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":25886000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":25886000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":30089000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":30089000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":4203000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":4203000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":44604000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":44604000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":14515000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":14515000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":24483000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":24483000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-25804000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":-25804000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-14028000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":-14028000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":11776000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":11776000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":-16885000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":-16885000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":-2859000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":-2859000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-14681000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":-14681000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":-14681000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":10527000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":10527000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":47055000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":47055000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":36526000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":36526000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":43975000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":43975000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":-3078000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":-3078000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":48322000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":48322000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":48322000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-2264000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":-2264000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-24536000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":-24536000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":-22272000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":-22272000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":-29905000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":-29905000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":-5370000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":-5370000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":7888000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":7888000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":15308000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":15308000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":893000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":893000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":-14415000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":-14415000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":-12424000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":-12424000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-13318000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-13318000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":25650000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-22520000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":-32005000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":-9485000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":-33943000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":-1939000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3"}]}},"OperatingLeaseLeaseIncome":{"label":"Operating Lease, Lease Income","description":"Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.","units":{"USD":[{"start":"2018-01-01","end":"2018-12-31","val":82746000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-06-30","val":38210000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":19837000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":59879000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":21669000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":81363000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":81363000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":22151000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":43937000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":43937000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":21846000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":21846000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":67808000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":67808000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":23871000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":23871000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":100199000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":100199000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":100199000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":32648000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":32648000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":65378000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":65378000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":32670000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":32670000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":94812000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":94812000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":29504000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":29504000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":123436000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":123436000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":123436000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":29382000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":29382000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":58360000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":58360000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":28979000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":28979000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":89806000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":89806000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":31445000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":31445000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":121859000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":121859000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":121859000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":32077000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":32077000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":64229000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":64229000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":32152000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":32152000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":96101000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":96101000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":31872000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":31872000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":128068000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":128068000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":31210000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":31210000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":61822000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":61822000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":30612000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":30612000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":92045000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":92045000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":30223000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":30223000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":120495000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":28245000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":57018000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":28772000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":83574000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":26556000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"OperatingLeasesFutureMinimumPaymentsReceivable":{"label":"Operating Leases, Future Minimum Payments Receivable","description":"Future minimum rental payments in aggregate as of the balance sheet date under operating leases.","units":{"USD":[{"end":"2012-06-30","val":42603000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":74773000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":142064000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"},{"end":"2013-03-31","val":157370000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":189098000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":223408000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":253472000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"},{"end":"2014-03-31","val":322636000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":325939000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":338819000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":348692000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-03-31","val":349179000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":347792000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":379096000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":375797000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-03-31","val":392980000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":422130000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":437361000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":450407000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-03-31","val":475384000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":445964000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":478010000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":223568000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":324155000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":349292000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":364503000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":329032000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"}]}},"OperatingLeasesFutureMinimumPaymentsReceivableCurrent":{"label":"Operating Leases, Future Minimum Payments Receivable, Current","description":"Future rental payments receivable within one year of the balance sheet date under an operating lease.","units":{"USD":[{"end":"2012-06-30","val":4755000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":3948000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":28346000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"},{"end":"2013-03-31","val":24887000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":19853000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":11876000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":51770000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"},{"end":"2014-03-31","val":48593000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":33587000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-12-31","val":71423000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-12-31","val":76903000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-12-31","val":99868000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-12-31","val":40535000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-12-31","val":52261000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"}]}},"OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears":{"label":"Operating Leases, Future Minimum Payments Receivable, in Five Years","description":"Future rental payments receivable within the fifth year from the balance sheet date under an operating lease.","units":{"USD":[{"end":"2012-06-30","val":5731000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":10568000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":15563000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"},{"end":"2013-03-31","val":18347000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":23842000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":28959000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":25775000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"},{"end":"2014-03-31","val":35923000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":38530000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":42495000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":34868000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-03-31","val":37878000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":40069000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":46288000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":37094000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-03-31","val":41379000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":47155000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":51453000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":43201000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-03-31","val":48604000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":48604000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":55922000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":22002000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":33530000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":38248000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":42432000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":34839000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"}]}},"OperatingLeasesFutureMinimumPaymentsReceivableInFourYears":{"label":"Operating Leases, Future Minimum Payments Receivable, in Four Years","description":"Future rental payments receivable within the fourth year from the balance sheet date under an operating lease.","units":{"USD":[{"end":"2012-06-30","val":7196000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":11886000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":20668000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"},{"end":"2013-03-31","val":24343000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":31557000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":38139000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":34405000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"},{"end":"2014-03-31","val":45904000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":48971000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":52762000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":46839000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-03-31","val":50043000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":52744000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":59134000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":48637000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-03-31","val":53482000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":60947000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":66784000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":57188000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-03-31","val":65195000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":65629000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":71983000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":27164000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":41681000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":45997000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":49918000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":40071000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"}]}},"OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears":{"label":"Operating Leases, Future Minimum Payments Receivable, in Three Years","description":"Future rental payments receivable within the third year from the balance sheet date under an operating lease.","units":{"USD":[{"end":"2012-06-30","val":8705000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":13571000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":23724000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"},{"end":"2013-03-31","val":28252000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":36865000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":45066000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":44544000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"},{"end":"2014-03-31","val":57043000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":60181000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":62647000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":57789000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-03-31","val":60920000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":63659000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":70105000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":60832000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-03-31","val":65842000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":74228000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":82183000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":72682000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-03-31","val":82552000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":81432000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":87116000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":32830000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":48408000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":52340000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":56312000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":46439000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"}]}},"OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears":{"label":"Operating Leases, Future Minimum Payments Receivable, in Two Years","description":"Future rental payments receivable within the second year from the balance sheet date under an operating lease.","units":{"USD":[{"end":"2012-06-30","val":9407000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":15489000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":26455000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"},{"end":"2013-03-31","val":31359000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":39985000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":47776000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":51340000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"},{"end":"2014-03-31","val":64679000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":67508000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":68565000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":67503000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-03-31","val":69713000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":72297000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":76136000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":71825000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-03-31","val":76234000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":86421000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":97632000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":87056000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-03-31","val":98129000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":95912000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":99939000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":37646000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":55023000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":58632000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":61898000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":50946000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"}]}},"OperatingLeasesFutureMinimumPaymentsReceivableRemainderOfFiscalYear":{"label":"Operating Leases, Future Minimum Payments Receivable, Remainder of Fiscal Year","description":"Amount of required minimum rental payments receivable in the remainder of the fiscal year following the latest fiscal year ended for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.","units":{"USD":[{"end":"2014-09-30","val":17234000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2015-03-31","val":53883000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":36641000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":18810000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2016-03-31","val":59156000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":44308000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":24511000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2017-03-31","val":81886000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":52032000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":25468000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2018-03-31","val":43020000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":30024000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":15168000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"}]}},"OperatingLeasesFutureMinimumPaymentsReceivableThereafter":{"label":"Operating Leases, Future Minimum Payments Receivable, Thereafter","description":"Future minimum lease payments receivable under operating leases for periods greater than five years following the balance sheet date.","units":{"USD":[{"end":"2012-06-30","val":6809000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":19311000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":27308000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"},{"end":"2013-03-31","val":30182000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":36996000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":51592000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":45638000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"},{"end":"2014-03-31","val":70494000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":77162000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":95116000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":70270000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-03-31","val":76742000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":82382000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":108623000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":80506000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-03-31","val":96887000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":109071000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":114798000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":90412000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-03-31","val":99018000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":102355000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":137582000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":63391000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":102493000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":124051000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":138775000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":104476000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"}]}},"OperatingLeasesIncomeStatementLeaseRevenue":{"label":"Operating Leases, Income Statement, Lease Revenue","description":"The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-04-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":66000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-07-01","end":"2010-09-30","val":66000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":154000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":154000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":117000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":583000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":583000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":466000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-04-01","end":"2011-06-30","val":466000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":1670000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":1670000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":1086000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-07-01","end":"2011-09-30","val":1086000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":3595000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":3501000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":3256000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":2832000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":2831000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":5631000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":5629000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":2799000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":2798000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":9334000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":8946000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":3704000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":3572000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":14704000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":13780000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":13780000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":8138000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":7649000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":18206000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":17279000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":10069000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":9630000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":32029000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":31107000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":14071000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":13828000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":46191000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":46191000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":46191000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":19535000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":19535000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":40428000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":40428000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":20892000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":20892000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":61932000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":61932000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":21505000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":21505000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":83682000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":83682000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":83682000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":21860000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":21860000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":43979000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":43979000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":22118000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":22118000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":66315000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":66315000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":22337000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":22337000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":88543000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":88543000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":88543000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":22831000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":22831000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":47417000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":47417000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":24585000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":24585000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":76646000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":76646000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":29229000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":29229000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":106330000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":106330000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":106330000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":30646000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":30646000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":62350000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":62350000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":31704000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":31704000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":90200000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":90200000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":27850000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":27850000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":110690000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":110690000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":15181000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":17349000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":34096000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":39439000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":18915000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":22091000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":53681000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":61771000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":19585000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":22332000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":72334000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":18373000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":18373000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":38210000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":19837000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":59879000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":21669000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3"},{"start":"2020-01-01","end":"2020-03-31","val":22151000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1"}]}},"OtherComprehensiveIncomeLossNetOfTax":{"label":"Other Comprehensive Income (Loss), Net of Tax","description":"Amount after tax and reclassification adjustments of other comprehensive income (loss).","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":-46000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-12-31","val":-46000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":-46000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":-46000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":342000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":160000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":160000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":-182000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":-182000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":278000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":278000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":118000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":118000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":33000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":33000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2012-01-01","end":"2012-12-31","val":33000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-12-31","val":33000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":33000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":33000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":6000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":6000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":4000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":4000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":-2000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":-2000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":8000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":8000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":4000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":4000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":4000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":4000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2013-01-01","end":"2013-12-31","val":4000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-12-31","val":4000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":4000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":4000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":9000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":9000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":9000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":9000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":9000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":9000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":9000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":9000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2014-01-01","end":"2014-12-31","val":9000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-12-31","val":9000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":9000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":9000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-06-30","val":849000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":849000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":849000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":849000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":3714000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":3714000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":2865000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":2865000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":25146000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":25146000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2017-01-01","end":"2017-12-31","val":25146000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-12-31","val":25146000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":25146000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":25146000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":0,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019"}]}},"OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease":{"label":"Other Comprehensive Income (Loss), Net of Tax (Deprecated 2012-01-31)","description":"This element represents Other Comprehensive Income or Loss, Net of Tax, for the period. Includes deferred gains or losses on qualifying hedges, unrealized holding gains or losses on available-for-sale securities, minimum pension liability, and cumulative translation adjustment. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.","units":{"USD":[{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-12-31","val":-46000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":342000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1"}]}},"OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax":{"label":"Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax (Deprecated 2013-01-31)","description":"Net of tax amount of the income statement impact of the reclassification adjustment for unrealized gain (loss) realized upon the sale of available-for-sale securities.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":-214000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012"},{"start":"2012-01-01","end":"2012-12-31","val":-214000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013"}]}},"OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax":{"label":"Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax","description":"Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.","units":{"USD":[{"start":"2012-01-01","end":"2012-12-31","val":214000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014"}]}},"OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax":{"label":"OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax","description":"Amount, after tax and before adjustment, of unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":-46000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2011"}]}},"OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax":{"label":"OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax","description":"Amount, before adjustment, of tax expense (benefit) for unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes tax expense (benefit) for unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":46000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":46000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":342000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":-342000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-160000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":-160000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":182000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":182000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":-278000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":-278000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-118000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-118000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":-247000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":-247000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":-247000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":-6000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":-6000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-4000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":-4000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":2000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":2000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":-8000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":-8000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":-4000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":-4000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":-4000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":-4000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":-4000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-9000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-9000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-9000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":-9000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":-9000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":-9000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-9000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":-9000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":-9000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-06-30","val":-849000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":-849000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":-849000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":-849000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":-3714000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":-3714000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":-2865000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":-2865000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":-25146000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":-25146000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":-25146000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":0,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019"}]}},"OtherIncome":{"label":"Other Income","description":"Amount of revenue and income classified as other.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":18000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":16000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":50000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":34000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":95000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":45000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":117000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":117000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":617000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":617000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":627000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":627000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":10000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":10000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":1119000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":1119000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":492000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":492000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":1366000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":1366000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":1366000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":30000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":30000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":45000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":45000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":14000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":14000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":7592000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":7592000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":7548000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":7548000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":7484000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":7484000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":7484000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-165000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-165000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-496000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":-331000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":-687000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":-191000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-1024000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":-1024000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":8100000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":4889000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":4889000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":5084000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":195000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":18400000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":5085000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017"}]}},"OtherLiabilities":{"label":"Other Liabilities","description":"Amount of liabilities classified as other.","units":{"USD":[{"end":"2010-12-31","val":51000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":51000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":51000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":234000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":521000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":722000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":722000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":722000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":722000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":722000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":1027000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":1280000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":1290000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":2827000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":2827000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":2827000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":2827000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":2827000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":4169000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":4918000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":5965000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":6481000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":6481000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":6481000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":6481000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":6481000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":9592000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":8463000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":8873000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":9192000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":9192000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":9192000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":9192000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":9192000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":9563000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":9445000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":14036000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":17905000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":17905000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":17905000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":17905000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":14190000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":27350000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":24392000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":14596000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":18095000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":18095000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":18095000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":18095000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":18095000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":15396000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":23754000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":21904000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":16966000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":16966000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":16966000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":16966000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":16966000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":14512000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":14614000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":16538000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":21006000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":21006000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":21006000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":21006000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":21006000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":19176000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":18043000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":18216000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":19801000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":19801000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":19801000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":19801000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":19801000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":20419000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":19472000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":19745000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":34738000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":34738000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":34734000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":34734000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":34734000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":37283000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":47356000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":43994000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":43513000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":43513000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":43513000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":42851000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":46931000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":54153000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":54610000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":52431000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":66967000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":66967000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q4I"},{"end":"2023-03-31","val":70864000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"}]}},"OtherNonoperatingIncomeExpense":{"label":"Other Nonoperating Income (Expense)","description":"Amount of income (expense) related to nonoperating activities, classified as other.","units":{"USD":[{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":-18000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-06-30","val":4889000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":4889000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":5084000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":195000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":5085000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":5085000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":5085000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017"}]}},"OtherOperatingIncome":{"label":"Other Operating Income","description":"The total amount of other operating income, the components of which are not separately disclosed on the income statement, from items that are associated with the entity's normal revenue producing operation.","units":{"USD":[{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-06-30","val":4889000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-09-30","val":5084000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-12-31","val":5085000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":5085000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":3304000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":3387000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":3387000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":4001000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":4001000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":2812000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018"},{"start":"2022-01-01","end":"2022-12-31","val":228000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":2907000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":1765000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"OtherRealEstateRevenue":{"label":"Other Real Estate Revenue (Deprecated 2018-01-31)","description":"Other real estate revenue not otherwise specified in the taxonomy.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-07-01","end":"2010-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":17000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":17000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":17000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-07-01","end":"2011-09-30","val":17000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":43000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":43000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":43000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":29000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":27000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":52000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":50000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":24000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":24000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":107000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":105000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":55000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":55000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":876000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":871000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":871000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":300000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":334000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":599000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":596000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":298000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":297000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":862000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":853000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":263000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":256000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":1974000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":1974000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":1974000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":577000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":577000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":1390000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":1390000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":813000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":813000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":2131000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":2131000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":741000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":741000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":2833000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":2833000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":2833000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":798000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":798000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":1613000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":1613000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":816000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":816000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":2495000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":2495000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":881000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":881000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":3304000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":3304000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":780000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":780000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":1578000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":1578000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":798000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":798000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":2580000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":2580000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":1002000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":1002000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":3387000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":1553000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":1553000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":2540000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":2540000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":987000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":987000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":3484000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":944000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3"},{"start":"2018-01-01","end":"2018-03-31","val":221000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":1173000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":952000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2"}]}},"OtherThanTemporaryImpairmentLossesInvestmentsHeldtomaturitySecurities":{"label":"Other-than-temporary Impairment Loss, Debt Securities, Held-to-maturity, before Tax","description":"Amount, before tax, of other-than-temporary impairment (OTTI) on investment in debt security measured at amortized cost (held-to-maturity), recognized in earnings and other comprehensive income (OCI).","units":{"USD":[{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":2500000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":2500000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":2500000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020"}]}},"PartnersCapitalAccountReturnOfCapital":{"label":"Partners' Capital Account, Return of Capital","description":"Total change in each class of partners' capital accounts during the year due to the return of partner's capital. That is, excess distributions over earnings to partners. All partners include general, limited and preferred partners.","units":{"USD":[{"start":"2012-01-01","end":"2012-09-30","val":100000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":100000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":100000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012"}]}},"PaymentForAdministrativeFees":{"label":"Payment for Administrative Fees","description":"Amount paid to managing member or general partner, affiliate of managing member or general partner, or affiliate of limited liability company (LLC) or limited partnership (LP) for administrative services provided to the LLC or LP, for example, but not limited to, salaries, rent, or overhead costs.","units":{"USD":[{"start":"2012-01-01","end":"2012-12-31","val":103000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":25000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":58000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":33000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":102000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":44000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":134000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":134000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":31000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":31000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":73000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":73000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":42000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":42000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":110000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":110000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":37000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":37000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":141000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":141000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":141000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":33000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":33000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":62000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":62000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":29000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":85000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":98000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":98000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":36000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":114000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":153000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":153000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":153000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":44000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":44000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":29000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":85000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":41000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":41000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":36000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":114000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":30000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":30000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":153000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":153000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":153000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":55000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":55000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":119000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":119000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":64000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":64000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":168000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":168000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":49000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":49000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":225000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":225000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":225000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":83000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":83000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":161000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":161000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":78000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":78000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":235000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":235000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":74000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":74000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":305000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":305000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":305000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":71000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":71000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":133000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":133000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":62000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":62000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":198000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":198000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":65000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":65000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":220000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":220000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":200000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":71000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021"}]}},"PaymentsForCapitalImprovements":{"label":"Payments for Capital Improvements","description":"The cash outflow for acquisition of or capital improvements to properties held for investment (operating, managed, leased) or for use.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":83000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":96000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":224000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":224000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":462000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":462000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":2430000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":2430000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":2430000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":1296000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":1296000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":2304000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":2304000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":4033000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":4033000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":7054000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":7054000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":7054000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":2584000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":2584000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":6472000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":6472000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":11440000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":11440000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":22398000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":22398000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":22398000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":8995000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":8995000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":15893000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":15893000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":22829000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":22829000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":33892000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":33892000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":33873000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":10070000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":10051000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":17641000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":17641000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":24209000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":24209000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":35586000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":35548000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":35548000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":6683000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":6683000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":14008000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":14008000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":21466000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":21466000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":30581000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":30581000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":30581000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":5493000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":5493000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":18784000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":18784000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":28775000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":28775000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":41224000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":41224000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":41224000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":5039000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":5039000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":14108000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":14108000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":21147000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":21147000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":32172000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":32172000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":32172000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":8052000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":8052000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":18207000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":18207000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":25833000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":25833000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":32472000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":32472000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":32472000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":7779000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":7779000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":11532000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":11532000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":15946000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":15946000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":21807000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":21807000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":21807000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":4434000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":4434000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":7727000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":7727000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":12923000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":12923000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":19038000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":19038000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":19038000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":4888000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":4888000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":10110000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":10110000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":16515000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":16515000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":31110000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":31110000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":31110000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":6764000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":6764000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":10349000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":10349000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-01-01","end":"2023-09-30","val":16394000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":16394000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":24081000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":24081000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":9862000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":9862000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":17512000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":17512000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":22039000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":22039000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-01-01","end":"2024-12-31","val":27512000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":4265000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":6458000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":9157000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"PaymentsForDepositsOnRealEstateAcquisitions":{"label":"Payments for Deposits on Real Estate Acquisitions","description":"Cash outflow related to amounts given in advance to show or confirm an intention to complete an acquisition of land, buildings, other structures, or any item classified as real estate.","units":{"USD":[{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-06-30","val":125810000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-09-30","val":293831000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"}]}},"PaymentsForDerivativeInstrumentInvestingActivities":{"label":"Payments for Derivative Instrument, Investing Activities","description":"The cash outflow for derivative instruments during the period, which are classified as investing activities, excluding those designated as hedging instruments.","units":{"USD":[{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":15000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":15000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":15000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":107000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":107000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":107000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":107000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":107000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-12-31","val":107000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":107000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":107000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":163000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":163000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":163000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":163000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":163000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":163000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":28000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":28000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":28000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":28000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":28000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":28000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":28000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":6000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":6000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":6000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":6000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":6000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":6000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":16000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":16000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":16000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":18000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":18000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":18000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":18000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":18000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":18000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":18000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":18000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":18000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":506000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":506000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":506000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":506000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":566000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":566000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":556000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":556000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":556000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":0,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":0,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":347000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":347000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-01-01","end":"2023-09-30","val":1236000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":1236000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":1236000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":1236000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":941000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":941000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":1447000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":1447000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":1447000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":1447000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-01-01","end":"2024-12-31","val":1447000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":0,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":0,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":0,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"PaymentsForProceedsFromInvestments":{"label":"Payments for (Proceeds from) Investments","description":"The net cash paid (received) associated with the acquisition or disposal of all investments, including securities and other assets.","units":{"USD":[{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":4625000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":4625000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":4625000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":5000000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":5000000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":12514000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":12514000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":12514000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":12514000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":12514000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":12514000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-7750000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-7750000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-09-30","val":-7750000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"}]}},"PaymentsForRepurchaseOfCommonStock":{"label":"Payments for Repurchase of Common Stock","description":"The cash outflow to reacquire common stock during the period.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":40000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":40000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":40000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":40000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":40000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":204000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":204000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":290000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":290000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":542000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":542000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":755000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":755000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":755000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":100000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":100000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":330000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":330000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":753000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":753000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":2450000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":2450000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":2450000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":594000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":594000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":2511000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":2511000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":3487000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":3487000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":5104000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":5104000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":5104000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":1162000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":1162000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":5284000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":5284000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":24025000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":24025000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":30100000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":30100000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":30100000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":44000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":44000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":6999000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":6999000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":31454000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":31454000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":38573000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":38573000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":38573000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":3681000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":3681000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":7511000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":7511000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":8050000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":8050000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":74780000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":74780000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":74780000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":4610000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":4610000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":115071000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":115071000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":120544000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":120544000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":123613000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":123613000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":123613000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":2539000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":2539000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":5107000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":5107000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":7433000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":7433000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":10028000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":10028000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":468000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":468000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":824000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":824000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":830000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":830000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":2230000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":853000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":853000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":1436000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":1436000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":29552000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":29552000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-03-31","val":589000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":589000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":2274000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":2274000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":4587000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":4587000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-03-31","val":1510000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":3214000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-09-30","val":5171000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"}]}},"PaymentsForRepurchaseOfRedeemablePreferredStock":{"label":"Payments for Repurchase of Redeemable Preferred Stock","description":"The cash outflow for reacquisition of callable preferred stock.","units":{"USD":[{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-09-30","val":5656000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":16934000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":16934000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":16934000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"PaymentsOfDividendsCommonStock":{"label":"Payments of Ordinary Dividends, Common Stock","description":"Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":2318000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":2318000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":2318000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":183000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":183000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":417000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":417000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":4341000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":4341000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":4341000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":4341000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":4341000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":1236000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":1236000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":1236000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":1236000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":9038000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":9038000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":9038000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":2260000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":2260000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":3793000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":3793000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":5785000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":5785000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":5785000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":2087000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":2087000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":4232000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":4232000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":6483000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":6483000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":8707000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":8707000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":8707000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":2271000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":2271000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":4580000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":4580000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":6948000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":6948000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":9228000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":9228000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":9228000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":2323000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":2323000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":4728000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":4728000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":7229000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":7229000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":7229000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":7229000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":7229000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":38170000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":38170000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":38567000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":38567000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":38983000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":38983000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":70980000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":70980000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":70980000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":292000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":292000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":587000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":587000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":886000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":886000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":886000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":886000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":886000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":305000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":305000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":334000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":334000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":334000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":334000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":334000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":334000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":334000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":11016000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":11016000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":11016000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":11016000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":11016000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":11016000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":11016000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":11016000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":11016000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":0,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"PaymentsOfDividendsMinorityInterest":{"label":"Payments of Ordinary Dividends, Noncontrolling Interest","description":"Amount of cash outflow in the form of ordinary dividends provided by the non-wholly owned subsidiary to noncontrolling interests.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":24000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":24000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":24000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":24000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":24000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":200000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":200000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":224000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":224000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":2211000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":2211000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":2237000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":2237000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":2237000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":157000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":157000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":157000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":157000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":157000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":157000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":157000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":4040000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":4040000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":4040000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":4040000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":5971000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":5971000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":7342000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":7342000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":7342000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":17000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":17000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":80000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":80000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":80000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":80000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":80000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":7000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":7000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":10000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":10000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":18000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":18000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":22000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":22000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":22000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":1739000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":1739000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":1824000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":1824000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":3793000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":3793000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":3869000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":3869000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":3869000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-09-30","val":28000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":28000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":28000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":28000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":28000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":9538000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":9538000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":9538000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-06-30","val":613000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-01-01","end":"2023-09-30","val":1094000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":1094000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":1094000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":0,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":271000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":271000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":2608000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":2608000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-01-01","end":"2024-12-31","val":2608000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":60000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":245000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":245000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"PaymentsOfDividendsPreferredStockAndPreferenceStock":{"label":"Payments of Ordinary Dividends, Preferred Stock and Preference Stock","description":"Amount of cash outflow in the form of ordinary dividends to preferred shareholders of the parent entity.","units":{"USD":[{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":140000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":140000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":372000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":372000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":563000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":563000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":764000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":764000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":764000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":225000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":225000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":453000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":453000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":644000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":644000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":913000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":913000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":913000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":191000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":191000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":718000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":718000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":1091000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":1091000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":1123000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":1123000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":1123000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":0,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"PaymentsOfFinancingCosts":{"label":"Payments of Financing Costs","description":"The cash outflow for loan and debt issuance costs.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":1161000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":1161000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":1161000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":12024000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":656000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":656000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":2511000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":2511000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":3499000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":3499000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":4988000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":4988000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":4988000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":2979000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":2979000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":3623000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":3623000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":3621000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":3621000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":4117000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":4117000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":4117000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":5000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":5000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":49000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":49000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":297000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":297000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":826000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":826000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":826000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":8824000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":8824000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":9154000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":9154000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":10641000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":10641000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":12377000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":12377000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":12377000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":1329000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":1329000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":1793000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":1793000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":2339000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":2339000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":2396000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":2396000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":2396000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":1227000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":1227000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":2702000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":2702000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":2791000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":2791000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":3391000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":3391000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":3391000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":7000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":7000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":1097000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":1097000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":1121000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":1121000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":1123000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":1123000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":1123000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":2302000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":2302000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":2452000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":2452000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":2438000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":2438000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":2556000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":2556000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":2556000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":1054000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":1054000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":2133000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":2133000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":2745000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":2745000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":8463000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":8463000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":8463000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":861000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":861000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":2829000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":2829000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":4686000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":4686000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":4770000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":4770000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":472000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":472000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":409000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":409000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-01-01","end":"2023-09-30","val":5028000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":5028000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":5416000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":1422000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":1422000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":3890000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":3890000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":6454000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":6454000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-01-01","end":"2025-03-31","val":167000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":167000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":3699000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"PaymentsOfStockIssuanceCosts":{"label":"Payments of Stock Issuance Costs","description":"The cash outflow for cost incurred directly with the issuance of an equity security.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":930000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-09-30","val":1617000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":3378000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":3378000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":730000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":1319000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":1319000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":2608000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":2608000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":3527000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":3527000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":3527000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":774000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":774000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":1581000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":1581000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":2498000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":2498000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":3612000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":3612000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":3612000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":133000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":133000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":184000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":184000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":195000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":195000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":200000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":200000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":200000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":2000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":2000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":2000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":2000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":12000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":12000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":12000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-12-31","val":9000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":9000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":9000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":168000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":865000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":865000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":865000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":140000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":140000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":196000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":196000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":376000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":376000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":480000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":480000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":480000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":213000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":213000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":295000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":295000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":458000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":458000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":562000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":562000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":562000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":2000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":2000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":2000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":2000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":2000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":2000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":157000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":157000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":157000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":182000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":182000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":547000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":547000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":606000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":606000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":811000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":811000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":811000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":32000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":32000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":111000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":111000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":164000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":164000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":227000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":227000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":227000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":0,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023"}]}},"PaymentsToAcquireAvailableForSaleSecurities":{"label":"Payments to Acquire Available-for-sale Securities","description":"The cash outflow to acquire debt and equity securities not classified as either held-to-maturity securities or trading securities which would be classified as available-for-sale securities and reported at fair value, with unrealized gains and losses excluded from earnings and reported in a separate component of shareholders' equity.","units":{"USD":[{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":0,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":38995000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":38995000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":43308000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":43308000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":43308000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":43308000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":43308000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":14963000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":14963000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":15851000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":15851000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":15851000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":15851000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":30609000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":30609000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":30609000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":15000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":15000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":15000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-09-30","val":10015000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-12-31","val":15224000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":15224000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":16789000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":16789000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-12-31","val":35971000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1"}]}},"PaymentsToAcquireAvailableForSaleSecuritiesEquity":{"label":"Payments to Acquire Available-for-sale Securities, Equity","description":"The cash outflow to acquire equity securities classified as available-for-sale securities, because they are not classified as trading securities.","units":{"USD":[{"start":"2017-01-01","end":"2017-06-30","val":38579000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-09-30","val":42845000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-12-31","val":64454000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":14799000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":15676000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-09-30","val":15676000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"}]}},"PaymentsToAcquireBusinessesNetOfCashAcquired":{"label":"Payments to Acquire Businesses, Net of Cash Acquired","description":"The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.","units":{"USD":[{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":46864000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":46864000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":46864000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-09-30","val":19034000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020"},{"start":"2021-01-01","end":"2021-09-30","val":4107000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021"}]}},"PaymentsToAcquireEquitySecuritiesFvNi":{"label":null,"description":null,"units":{"USD":[{"start":"2019-01-01","end":"2019-12-31","val":15224000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-06-30","val":21283000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":35510000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":35971000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":35971000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022"}]}},"PaymentsToAcquireInterestInJointVenture":{"label":"Payments to Acquire Interest in Joint Venture","description":"The cash outflow associated with the investment in or advances to an entity in which the reporting entity shares control of the entity with another party or group.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-06-30","val":8000000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":8000000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":8000000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":8000000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":8000000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":8000000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":8000000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":9000000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":9000000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":9000000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":58382000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":58382000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":58387000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":58387000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":58987000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":58987000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":58987000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":840000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":840000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":1680000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":1680000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":2760000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":2760000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":2760000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":2760000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":2760000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":600000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":600000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":1800000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":1800000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":2820000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":2820000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":2820000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":2820000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":2820000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":0,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":0,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-06-30","val":1320000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":1320000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":1320000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":1320000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":1320000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":1320000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":1320000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-06-30","val":5000000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":5000000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":5050000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":5050000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":31845000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":31845000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":31845000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-06-30","val":434000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":434000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":1708000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":1708000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":12620000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":12620000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":12620000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-06-30","val":4024000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":4024000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":4769000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":4769000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":10539000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":10539000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":10539000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":1200000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":22500000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-09-30","val":23887000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":23780000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":23780000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":23780000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":0,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":0,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-01-01","end":"2023-09-30","val":28388000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":31428000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":31428000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":15634000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":15634000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":38689000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":38689000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":63376000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":63376000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-01-01","end":"2024-12-31","val":79530000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":0,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":0,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":0,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"PaymentsToAcquireInvestments":{"label":"Payments to Acquire Investments","description":"The cash outflow associated with the purchase of all investments (debt, security, other) during the period.","units":{"USD":[{"start":"2017-01-01","end":"2017-12-31","val":12514000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019"}]}},"PaymentsToAcquireLoansReceivable":{"label":"Payments to Acquire Loans Receivable","description":"The cash outflow for the purchase of loan receivable arising from the financing of goods and services.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-09-30","val":8822000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":16002000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":16002000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":19953000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":20120000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":20120000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":20120000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":20120000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":20120000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":20120000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":20120000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":35539000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":35539000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":35700000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":35700000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":78360000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":78360000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":78398000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":78398000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":78398000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":21555000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":21555000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":21568000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":21568000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":21568000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":21568000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":21568000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":21568000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":21568000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":5850000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-12-31","val":5850000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":5850000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":5850000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016"}]}},"PaymentsToAcquireRealEstate":{"label":"Payments to Acquire Real Estate","description":"The cash outflow from the acquisition of a piece of land, anything permanently fixed to it, including buildings, structures on it and so forth; includes real estate intended to generate income for the owner; excludes real estate acquired for use by the owner.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-09-30","val":1800000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":1800000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":1800000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":407000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":300000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":300000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":7552000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":7552000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":73597000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":73597000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":73597000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":95545000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":95545000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":211655000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":211655000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":211655000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":74781000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":74781000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":159028000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":159028000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":243988000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":243988000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":295167000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":295167000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":295167000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":182770000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":182770000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":182736000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":182736000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":191701000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":191701000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":191925000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":191925000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":191925000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":125810000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":293831000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":293831000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":293831000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":293831000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":82235000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":82235000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":82235000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":82235000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":165465000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":165465000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":165465000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":165465000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":238170000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":238170000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":312348000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":312348000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":312348000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":312348000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":312348000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":90266000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-09-30","val":90266000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"}]}},"PaymentsToMinorityShareholders":{"label":"Payments to Noncontrolling Interests","description":"Amount of cash outflow to a noncontrolling interest. Includes, but not limited to, reduction of noncontrolling interest ownership. Excludes dividends paid to the noncontrolling interest.","units":{"USD":[{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":741000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":741000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":37986000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":37986000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":37986000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":37986000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":37986000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":37986000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":37986000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":0,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-06-30","val":34000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":34000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":10663000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":10663000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-06-30","val":613000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-09-30","val":1094000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"}]}},"PreferredStockParOrStatedValuePerShare":{"label":"Preferred Stock, Par or Stated Value Per Share","description":"Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.","units":{"USD/shares":[{"end":"2010-12-31","val":0.01,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":0.01,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":0.01,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":0.01,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":0.01,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":0.01,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":0.01,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":0.01,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":0.01,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":0.01,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":0.01,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":0.01,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":0.01,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":0.01,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":0.01,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":0.01,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":0.01,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":0.01,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":0.01,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":0.01,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":0.01,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":0.01,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":0.01,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":0.01,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":0.01,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":0.01,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":0.01,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":0.01,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":0.01,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":0.01,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":0.01,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":0.01,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":0.01,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":0.01,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":0.01,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":0.01,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":0.01,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0.01,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":0.01,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":0.01,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":0.01,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":0.01,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":0.01,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":0.01,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":0.01,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":0.01,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":0.01,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":0.01,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":0.01,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":0.01,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":0.01,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":0.01,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":0.01,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":0.01,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":0.01,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":0.01,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":0.01,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":0.01,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":0.01,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":0.01,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":0.01,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":0.01,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":0.01,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":0.01,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":0.01,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":0.01,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":0.01,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":0.01,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":0.01,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":0.01,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":0.01,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":0.01,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":0.01,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":0.01,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":0.01,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":0.01,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":0.01,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-10-05","val":0.01,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-10-05","val":0.01,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-10-05","val":0.01,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-10-05","val":0.01,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":0.01,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":0.01,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":0.01,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":0.01,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":0.01,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":0.01,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":0.01,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":0.01,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":0.01,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":0.01,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":0.01,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":0.01,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":0.01,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":0.01,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":0.01,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":0.01,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":0.01,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":0.01,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":0.01,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":0.01,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":0.01,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":0.01,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":0.01,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":0.01,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":0.01,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":0.01,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":0.01,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":0.01,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":0.01,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":0.01,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":0.01,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":0.01,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":0.01,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":0.01,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":0.01,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":0.01,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":0.01,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":0.01,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":0.01,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"PreferredStockSharesAuthorized":{"label":"Preferred Stock, Shares Authorized","description":"The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.","units":{"shares":[{"end":"2010-12-31","val":10000000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":10000000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":10000000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":10000000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":10000000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":10000000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":10000000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":10000000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":10000000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":10000000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":10000000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":10000000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":10000000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":10000000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":10000000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":10000000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":10000000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":10000000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":10000000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":10000000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":10000000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":10000000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":10000000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":10000000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":10000000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":10000000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":10000000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":10000000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":10000000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":10000000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":10000000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":10000000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":10000000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":10000000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":10000000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":10000000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":10000000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":10000000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":10000000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":10000000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":10000000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":10000000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":10000000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":10000000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":10000000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":10000000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":10000000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":10000000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":10000000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":10000000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":10000000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":10000000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":10000000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":10000000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":10000000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":10000000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":10000000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":10000000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":10000000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":10000000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":10000000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":10000000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":10000000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":10000000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":10000000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":10000000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":10000000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":10000000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":10000000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":10000000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":10000000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":10000000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":10000000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":10000000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":10000000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":10000000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":10000000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":10000000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":10000000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":10000000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":10000000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":10000000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":10000000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":10000000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":10000000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":10000000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":10000000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":10000000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":10000000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":10000000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":10000000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":10000000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":10000000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":10000000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":10000000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":10000000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":10000000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":10000000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":10000000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":10000000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":10000000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":10000000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":10000000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":10000000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":10000000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":10000000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":10000000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":10000000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":10000000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":10000000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":10000000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":10000000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":10000000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":10000000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":10000000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":10000000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"PreferredStockSharesIssued":{"label":"Preferred Stock, Shares Issued","description":"Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.","units":{"shares":[{"end":"2010-12-31","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":0,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":0,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":0,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":0,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":0,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":0,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":0,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":0,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":0,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":0,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":0,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":0,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":0,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":0,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":0,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":0,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":0,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":0,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":0,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":0,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":0,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":0,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":0,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":0,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":0,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":0,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":0,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":0,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"PreferredStockSharesOutstanding":{"label":"Preferred Stock, Shares Outstanding","description":"Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.","units":{"shares":[{"end":"2010-12-31","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":0,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":0,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":0,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":0,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":0,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":0,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":0,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":0,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":0,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":0,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":0,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":0,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":0,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":0,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":0,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":0,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":0,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":0,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":0,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":0,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":0,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":0,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":0,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":0,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":0,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":0,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":0,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":0,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"PreferredStockValue":{"label":"Preferred Stock, Value, Issued","description":"Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity.","units":{"USD":[{"end":"2010-12-31","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":0,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":0,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":0,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":0,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":0,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":0,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":0,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":0,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":0,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":0,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":0,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":0,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":0,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":0,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":0,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":0,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":0,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":0,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":0,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":0,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":0,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":0,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":0,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":0,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":0,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":0,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":0,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":0,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"PrepaidExpenseAndOtherAssets":{"label":"Prepaid Expense and Other Assets","description":"Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets.","units":{"USD":[{"end":"2010-12-31","val":914000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":914000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":914000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":434000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":706000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":2374000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":2374000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":2374000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":2374000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":2216000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":2947000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":3356000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":4092000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":3850000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":3850000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":3850000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":3830000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":3808000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":5656000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":10051000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":16853000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":29881000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":29881000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":29881000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":29818000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":29818000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":26035000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":27759000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":28261000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":28491000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":28309000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":28309000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":28309000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":22223000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":28002000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":29244000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":37811000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":30830000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":25023000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":25023000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":25023000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":25023000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":26208000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":41589000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":28554000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":29206000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":29206000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":28476000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":28476000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":15794000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":35698000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":41689000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":31469000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":18182000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":18182000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":17404000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":17404000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":12735000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":17677000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":16069000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":18056000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":13123000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":13123000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":12736000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":12736000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":11782000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":14489000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":13501000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":15115000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":13988000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":13988000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":13988000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":13988000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":13988000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":24427000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":26900000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":15174000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":21344000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":21344000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":19363000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":19363000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":19363000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":22619000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":19496000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":22103000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":19027000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":18108000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":18108000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":18108000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":20750000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":21028000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":19336000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":21902000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":22848000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":22848000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":22848000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":22848000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":22848000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":24941000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":25211000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":25320000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":27222000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":28170000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":28170000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":26292000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":26292000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":25661000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":23778000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":20904000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":19176000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":19176000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":19176000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":14695000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":20197000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":17762000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":12666000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"ProceedsFromCollectionOfLoansReceivable":{"label":"Proceeds from Collection of Loans Receivable","description":"The cash inflow associated with the collection, including prepayments, of loans receivable issued for financing of goods and services.","units":{"USD":[{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-06-30","val":27850000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-09-30","val":27850000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"}]}},"ProceedsFromDerivativeInstrumentInvestingActivities":{"label":"Proceeds from Derivative Instrument, Investing Activities","description":"The cash inflow provided by derivative instruments during the period, which are classified as investing activities, excluding those designated as hedging instruments.","units":{"USD":[{"start":"2017-01-01","end":"2017-09-30","val":6557000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2019-01-01","end":"2019-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":14125000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2022-01-01","end":"2022-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-03-31","val":0,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":49176000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":0,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-01-01","end":"2023-09-30","val":71027000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":0,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-03-31","val":1478000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":1478000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":1687000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":1687000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":2439000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":2439000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-01-01","end":"2025-03-31","val":0,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":0,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":0,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"ProceedsFromDivestitureOfInterestInJointVenture":{"label":"Proceeds from Divestiture of Interest in Joint Venture","description":"The cash inflow from the sale of an investment interest in a joint venture that the reporting entity has not previously accounted for using consolidation or the equity method of accounting.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-09-30","val":74000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":74000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":74000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":74000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":74000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-12-31","val":398000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":398000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":398000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":2179000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":2179000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":2179000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":59157000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":59157000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":59157000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":59157000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":59157000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":59157000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":59800000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":59800000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":59800000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":386000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":386000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":1160000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":1160000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":2199000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":2199000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":2198000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":2198000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":2198000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":7800000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":7800000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":8051000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":8051000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":8051000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":8051000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":8051000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":8051000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":8051000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":1225000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":1225000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":1225000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":1225000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":1225000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":1225000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":1370000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":1370000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":1370000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":142000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":142000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":569000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":569000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":569000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":569000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":569000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":569000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":569000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":1144000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":1144000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":1144000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":1144000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-01-01","end":"2023-09-30","val":1144000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":1144000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":1144000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":1144000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":0,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":1497000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":1497000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":1497000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":1497000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-01-01","end":"2024-12-31","val":1497000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-06-30","val":759000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":757000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"ProceedsFromInsuranceSettlementInvestingActivities":{"label":"Proceeds from Insurance Settlement, Investing Activities","description":"Amount of cash inflow for proceeds from settlement of insurance claim, classified as investing activities. Excludes insurance settlement classified as operating activities.","units":{"USD":[{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-06-30","val":258000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":258000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":294000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":294000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":294000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":894000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":894000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":700000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":256000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":1739000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":256000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":1767000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":2453000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":2453000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":2453000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":744000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":744000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":744000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":744000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":744000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":744000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":744000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":744000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":744000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-06-30","val":438000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":438000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":438000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":438000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":438000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021"}]}},"ProceedsFromIssuanceOfCommonStock":{"label":"Proceeds from Issuance of Common Stock","description":"The cash inflow from the additional capital contribution to the entity.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":14893000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-09-30","val":26252000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":50400000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":50400000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":17688000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":60517000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":60517000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":97069000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":97069000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":165079000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":165079000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":165079000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":40462000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":40462000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":96449000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":96449000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":177037000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":177037000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":348790000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":348790000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":348790000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014"}]}},"ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan":{"label":"Proceeds from Issuance of Common Stock, Dividend Reinvestment Plan","description":"Amount of cash inflow from capital contributions to an entity associated with a dividend reinvestment plan.","units":{"USD":[{"start":"2019-01-01","end":"2019-12-31","val":800000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":300000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020"}]}},"ProceedsFromIssuanceOfPreferredStockAndPreferenceStock":{"label":"Proceeds from Issuance of Preferred Stock and Preference Stock","description":"Proceeds from issuance of capital stock which provides for a specific dividend that is paid to the shareholders before any dividends to common stockholders and which takes precedence over common stockholders in the event of liquidation.","units":{"USD":[{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":15008000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":15008000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":15008000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021"}]}},"ProceedsFromLoanAndLeaseOriginationsAndPrincipalCollections1":{"label":"Proceeds from Loan and Lease Originations and Principal Collections","description":"Cash inflow related to a loan origination (the process when securing a mortgage for a piece of real property), lease origination, and principal collections.","units":{"USD":[{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-06-30","val":27850000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":27850000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":27850000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":27850000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":27850000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018"}]}},"ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities":{"label":"Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale","description":"Amount of cash inflow from maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":2252000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":2252000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":21883000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":21883000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":33892000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":33892000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":38270000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":38270000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":38270000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":1798000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":1798000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":2235000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":2235000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":3263000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":3263000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":4452000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":4452000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":4452000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":314000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":314000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":333000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":333000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":333000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":333000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":333000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":333000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":333000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":4500000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":4500000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":4500000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":7750000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":7750000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":7750000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":7750000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":7750000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":7750000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2021"}]}},"ProceedsFromMinorityShareholders":{"label":"Proceeds from Noncontrolling Interests","description":"Amount of cash inflow from a noncontrolling interest. Includes, but is not limited to, purchase of additional shares or other increase in noncontrolling interest ownership.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":1461000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":1461000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":13737000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":13737000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":13737000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":997000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":997000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":1075000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":1075000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":1220000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":1220000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":2630000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":2630000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":2630000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":342000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":342000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":593000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":593000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":644000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":644000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":1213000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":1213000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":1213000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":1475000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":1475000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":1506000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":1506000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":2436000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":2436000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":2585000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":2585000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":2585000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":239000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":239000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":360000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":360000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":751000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":751000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":1343000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":1343000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":1343000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":167000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":167000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":766000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":766000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":769000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":769000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":803000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":803000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":803000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":1000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":1000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":11000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":11000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":150000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":150000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":158000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":158000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":158000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":8000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":8000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":742000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":742000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":760000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":760000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":762000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":762000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":762000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":12000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":12000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":12000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":12000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":12000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":12000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":13000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":13000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":13000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":112000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":112000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":112000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":112000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":112000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":112000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":844000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":844000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":844000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":20000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":20000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":163000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":163000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":183000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":183000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":183000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":183000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":183000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":0,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-09-30","val":300000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":300000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":300000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":300000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":300000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":0,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":0,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-01-01","end":"2023-09-30","val":450000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":450000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":543000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":543000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":350000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":350000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":397000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":397000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":493000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":493000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-01-01","end":"2024-12-31","val":584000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":0,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":10000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":35000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"ProceedsFromNotesPayable":{"label":"Proceeds from Notes Payable","description":"The cash inflow from a borrowing supported by a written promise to pay an obligation.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":3477000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":3477000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":33002000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":33002000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":33002000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":757000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":757000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":1093000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":1093000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":2051000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":2051000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":4226000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":4226000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":4226000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":44802000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":44802000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":154494000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":154494000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":194416000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":194416000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":251065000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":251065000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":251065000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":193361000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":193361000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":261146000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":261146000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":272637000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":272637000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":307254000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":307254000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":307254000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":30066000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":39706000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-09-30","val":51182000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-12-31","val":61189000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":61189000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":61189000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-12-31","val":564336000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":564336000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":564336000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":187204000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":187204000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":187204000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":223425000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":223425000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":223425000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":84268000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":84268000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":84268000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":112480000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":112480000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":112480000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":358931000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":358931000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021"},{"start":"2022-01-01","end":"2022-06-30","val":145104000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-12-31","val":188106000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022"},{"start":"2023-01-01","end":"2023-06-30","val":980000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"}]}},"ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase":{"label":"Proceeds from (Payments for) in Securities Sold under Agreements to Repurchase","description":"The cash flow from investments sold under the agreement to repurchase such investment.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":30201000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2011"}]}},"ProceedsFromPaymentsForOtherFinancingActivities":{"label":"Proceeds from (Payments for) Other Financing Activities","description":"Amount of cash inflow (outflow) from financing activities classified as other.","units":{"USD":[{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-09-30","val":693000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":693000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":647000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":647000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":647000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":1822000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":1822000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":1822000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":1822000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":1822000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":1822000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":1822000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":1822000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":1822000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":2367000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":2367000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":2367000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":2367000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":2367000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":2367000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":2367000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":2367000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":2367000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":0,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023"}]}},"ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities":{"label":"Proceeds from Sale and Maturity of Debt Securities, Available-for-sale","description":"Amount of cash inflow from sale, maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":14943000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":14943000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":14943000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014"}]}},"ProceedsFromSaleOfAvailableForSaleSecuritiesEquity":{"label":"Proceeds from Sale of Available-for-sale Securities, Equity","description":"The cash inflow associated with the sale of equity securities classified as available-for-sale securities.","units":{"USD":[{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-09-30","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":633000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":633000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":27786000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":27786000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":27786000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":24076000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":24076000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":24076000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-09-30","val":24076000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-12-31","val":28033000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":28033000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":7849000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":7849000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-12-31","val":10964000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":14439000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1"}]}},"ProceedsFromSaleOfEquitySecuritiesFvNi":{"label":null,"description":null,"units":{"USD":[{"start":"2019-01-01","end":"2019-12-31","val":28033000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-06-30","val":10964000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":10964000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":10964000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":10964000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":14439000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":14439000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":14439000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":14439000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":14439000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":14439000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":14439000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":14439000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":0,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":0,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":13557000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":13557000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-01-01","end":"2023-09-30","val":13791000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":13791000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":13946000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":13946000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":14309000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":14309000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":16379000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":16379000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":16379000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":16379000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-01-01","end":"2024-12-31","val":16379000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":0,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":0,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":0,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"ProceedsFromSaleOfRealEstate":{"label":"Proceeds from Sale of Real Estate","description":"Cash received for the sale of real estate that is not part of an investing activity during the current period.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":1142000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":1142000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":1845000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":1845000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":1843000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":1843000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":1843000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":1843000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":1843000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":7545000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":7545000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":7545000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":7545000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":7545000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":7545000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":30658000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":30658000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":30658000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":1393000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":1393000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":1393000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":1393000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":1393000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":15734000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":15734000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":15738000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":15738000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":25045000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":25045000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":38772000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":38772000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":38772000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":0,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":0,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":0,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":94914000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":94914000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":130580000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":130580000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":872091000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":872091000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":2542000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":2542000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":2567000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":2567000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":85615000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":85615000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":250576000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":17894000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":17894000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-09-30","val":43164000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"}]}},"ProceedsFromSaleOfRealEstateHeldforinvestment":{"label":"Proceeds from Sale of Real Estate Held-for-investment","description":"Cash received from the sale of real estate that is held for investment, that is, it is part of an investing activity during the period.","units":{"USD":[{"start":"2017-01-01","end":"2017-12-31","val":872091000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":250576000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":250576000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":17894000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":17894000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":43164000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":141548000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":141548000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":141548000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":332000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":332000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":332000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":166000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":166000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":49662000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":49662000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":194528000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":194528000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":194711000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":194711000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":194711000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":398000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":398000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":357000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":357000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":97933000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":97933000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":151178000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":151178000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":151178000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":34479000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":34479000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":40795000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":40795000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-01-01","end":"2023-09-30","val":40867000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":40867000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":116318000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":116318000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":1498000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":1498000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":3126000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":3126000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":87411000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":87411000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-01-01","end":"2024-12-31","val":232347000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":1351000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":1845000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":34035000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"ProfitLoss":{"label":"Net Income (Loss), Including Portion Attributable to Noncontrolling Interest","description":"The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":-7000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-09-30","val":-1066000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-07-01","end":"2010-09-30","val":-460000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":-1975000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":-1975000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":-1975000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-703000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-2380000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":-1677000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":-4326000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":-4326000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":-1947000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-07-01","end":"2011-09-30","val":-1947000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":-7799000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":-7799000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2011-01-01","end":"2011-12-31","val":-7799000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-12-31","val":-7799000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":-7799000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":-7799000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-705000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":-705000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2012-01-01","end":"2012-03-31","val":-705000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-3513000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":-3513000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":-2808000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":-2808000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":-2808000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":-7173000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":-7173000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-3660000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-3660000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":-3660000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":-10095000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":-10095000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2012-01-01","end":"2012-12-31","val":-10095000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-12-31","val":-10095000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":-10095000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":-10095000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2012-10-01","end":"2012-12-31","val":-2922000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4"},{"start":"2013-01-01","end":"2013-03-31","val":1741000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":1741000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-03-31","val":1741000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2013-01-01","end":"2013-03-31","val":1741000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-687000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":-687000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":-2429000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":-2429000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-04-01","end":"2013-06-30","val":-2429000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":-2429000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":6574000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":6574000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":7260000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":7260000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-07-01","end":"2013-09-30","val":7260000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":7260000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":11589000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":11589000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2013-01-01","end":"2013-12-31","val":11589000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-12-31","val":11589000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":11589000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":11589000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2013-10-01","end":"2013-12-31","val":5017000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-10-01","end":"2013-12-31","val":5017000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4"},{"start":"2014-01-01","end":"2014-03-31","val":-9894000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-9894000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-03-31","val":-9894000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2014-01-01","end":"2014-03-31","val":-9894000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-15374000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":-15374000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":-5480000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":-5480000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-04-01","end":"2014-06-30","val":-5480000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":-5480000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":-18801000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":-18801000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":-3426000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":-3426000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-07-01","end":"2014-09-30","val":-3426000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":-3426000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-23748000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":-23748000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2014-01-01","end":"2014-12-31","val":-23748000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-12-31","val":-23748000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":-23748000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":-23748000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2014-10-01","end":"2014-12-31","val":-4948000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-10-01","end":"2014-12-31","val":-4948000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4"},{"start":"2015-01-01","end":"2015-03-31","val":5385000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":5385000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-03-31","val":5385000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2015-01-01","end":"2015-03-31","val":5385000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":8024000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":8024000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":2639000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":2639000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-04-01","end":"2015-06-30","val":2639000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":2639000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":7747000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":7747000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":-277000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":-277000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-07-01","end":"2015-09-30","val":-277000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":-277000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":7132000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":7132000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2015-01-01","end":"2015-12-31","val":7132000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-12-31","val":7132000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":7132000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":7132000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2015-10-01","end":"2015-12-31","val":-682000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-10-01","end":"2015-12-31","val":-682000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4"},{"start":"2016-01-01","end":"2016-03-31","val":-4932000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":-4932000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-03-31","val":-4932000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2016-01-01","end":"2016-03-31","val":-4932000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":-6921000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":-6921000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":-1989000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":-1989000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-04-01","end":"2016-06-30","val":-1989000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":-1989000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":-21928000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":-21928000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":-15007000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":-15007000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-07-01","end":"2016-09-30","val":-15007000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":-15007000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":-29126000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":-29126000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2016-01-01","end":"2016-12-31","val":-29126000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-12-31","val":-29126000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":-29126000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":-29126000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2016-10-01","end":"2016-12-31","val":-7198000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-10-01","end":"2016-12-31","val":-7198000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4"},{"start":"2017-01-01","end":"2017-03-31","val":-9058000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":-9058000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-03-31","val":-9058000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2017-01-01","end":"2017-03-31","val":-9058000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":14751000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":14751000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":23809000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":23809000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-04-01","end":"2017-06-30","val":23809000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":23809000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":4210000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":4210000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":-10542000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":-10542000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-07-01","end":"2017-09-30","val":-10542000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":-10542000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":210580000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":210580000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2017-01-01","end":"2017-12-31","val":210580000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-12-31","val":210580000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":210580000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":210580000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2017-10-01","end":"2017-12-31","val":206371000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-10-01","end":"2017-12-31","val":206371000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4"},{"start":"2018-01-01","end":"2018-03-31","val":-23702000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":-23702000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-03-31","val":-23702000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2018-01-01","end":"2018-03-31","val":-23702000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-13709000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":-13709000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":9993000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":9993000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-04-01","end":"2018-06-30","val":9993000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":9993000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":22711000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":22711000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":36421000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":36421000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-07-01","end":"2018-09-30","val":36421000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":36421000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":33324000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":33324000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":33324000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2018-10-01","end":"2018-12-31","val":10612000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-10-01","end":"2018-12-31","val":10612000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4"},{"start":"2019-01-01","end":"2019-03-31","val":17460000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":17460000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-03-31","val":17460000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":11159000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":11159000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":-6301000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":-6301000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-04-01","end":"2019-06-30","val":-6301000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":13449000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":13449000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":2290000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":2290000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-07-01","end":"2019-09-30","val":2290000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":-15181000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":-15181000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":-15181000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2019-10-01","end":"2019-12-31","val":-28630000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4"},{"start":"2020-01-01","end":"2020-03-31","val":-17639000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":-17639000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-13779000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":-13779000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":3860000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":3860000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":-21147000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":-21147000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":-7368000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":-7368000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-48813000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":-48813000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":-48813000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":6042000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":6042000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":27798000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":27798000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":21758000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":21758000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":2253000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":2253000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":-25546000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":-25546000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":-12498000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":-12498000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":-12498000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-4729000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":-4729000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-13100000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":-13100000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":-8369000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":-8369000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":-44101000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":-44101000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":-31000000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":-31000000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":-41670000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":-41670000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":-41670000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-19770000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":-19770000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-77251000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":-77251000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":-57481000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":-57481000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":-139794000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":-139794000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-62543000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-62543000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":-146477000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":-146477000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-76994000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":-76994000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":-122652000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":-122652000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":-45658000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":-45658000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":-168358000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":-168358000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":-45706000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":-45706000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":-104872000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":-19862000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":-127271000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":-107409000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":-247152000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":-119881000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"PropertyManagementFeePercentFee":{"label":"Property Management Fee, Percent Fee","description":"The percentage charged for managing real estate properties.","units":{"pure":[{"start":"2015-01-01","end":"2015-12-31","val":0.0075,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015"},{"start":"2016-01-01","end":"2016-12-31","val":0.0075,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":0.0075,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":0.0075,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018"}]}},"ProvisionForDoubtfulAccounts":{"label":"Accounts Receivable, Credit Loss Expense (Reversal)","description":"Amount of expense (reversal of expense) for expected credit loss on accounts receivable.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":17000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":52000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":52000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":33000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":171000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":139000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":197000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":197000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":197000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":39000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":39000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":108000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":108000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":136000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":136000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":176000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":176000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":176000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":70000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":70000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":107000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":107000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":323000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":323000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":331000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":331000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":331000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":210000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":210000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":307000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":307000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":488000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":488000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":875000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":875000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":875000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":-36000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":-36000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":-58000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":-58000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":66000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":66000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":724000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":724000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":724000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":-366000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":-366000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-218000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":-218000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":-5000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":-5000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":161000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":161000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":161000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020"},{"start":"2024-01-01","end":"2024-09-30","val":1936000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-01-01","end":"2025-09-30","val":1780000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"RealEstateAccumulatedDepreciation":{"label":"SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation","description":"Amount of accumulated depreciation pertaining to real estate investments for entities with a substantial portion of business acquiring and holding investment real estate.","units":{"USD":[{"end":"2010-12-31","val":190000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2010-12-31","val":190000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2010Q4I"},{"end":"2011-12-31","val":2583000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2011-12-31","val":2583000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2011-12-31","val":2583000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2011Q4I"},{"end":"2012-12-31","val":8521000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":8521000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2012-12-31","val":8521000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2012-12-31","val":8521000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2012Q4I"},{"end":"2013-12-31","val":29859000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":29859000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2013-12-31","val":29859000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2013-12-31","val":29859000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2013Q4I"},{"end":"2014-12-31","val":64171000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":64171000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2014-12-31","val":64171000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2014-12-31","val":64171000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2014Q4I"},{"end":"2015-12-31","val":91560000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":91560000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2015-12-31","val":91560000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2015-12-31","val":91560000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2015Q4I"},{"end":"2016-12-31","val":120176000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":120176000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2016-12-31","val":120176000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2016-12-31","val":120176000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2016Q4I"},{"end":"2017-12-31","val":41817000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":41817000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2017-12-31","val":41817000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2017-12-31","val":41817000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2017Q4I"},{"end":"2018-12-31","val":49842000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":49842000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2018-12-31","val":49842000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2018-12-31","val":49842000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2018Q4I"},{"end":"2019-12-31","val":65381000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":65381000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2019-12-31","val":65381000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2019-12-31","val":65381000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2019Q4I"},{"end":"2020-12-31","val":104412000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":104412000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2020-12-31","val":104412000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2020-12-31","val":104412000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2020Q4I"},{"end":"2021-12-31","val":130441000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":130441000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2021-12-31","val":130441000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2021-12-31","val":130441000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2021Q4I"},{"end":"2022-12-31","val":141750000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":141750000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2022-12-31","val":141750000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022Q4I"},{"end":"2023-12-31","val":167335000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":167335000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-12-31","val":162141000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"}]}},"RealEstateAccumulatedDepreciationDepreciationExpense":{"label":"Real Estate Accumulated Depreciation, Depreciation Expense (Deprecated 2013-01-31)","description":"Amount of depreciation expense for the period.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":3161000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2011-01-01","end":"2011-12-31","val":3161000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":9305000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012"},{"start":"2012-01-01","end":"2012-12-31","val":9305000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2013-01-01","end":"2013-12-31","val":28956000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013"}]}},"RealEstateAccumulatedDepreciationOtherDeductions":{"label":"SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation, Other Deduction","description":"Amount of other deductions to accumulated depreciation, excluding sales, for entities with a substantial portion of business acquiring and holding investment real estate.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":768000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":768000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":3360000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":3360000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":3360000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":5835000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":5835000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":5835000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":10362000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":10362000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":10362000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":13212000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":13212000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":13212000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-12-31","val":19220000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":19220000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":19220000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":18735000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":18735000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":18735000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":7329000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":7329000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":7329000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":1060000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":1060000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":1060000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":3114000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":3114000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":3114000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":5956000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":5956000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":5956000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":10442000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":10442000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":10442000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":5332000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":5332000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":1408000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"RealEstateAccumulatedDepreciationRealEstateSold":{"label":"SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation, Investment in Real Estate Sold","description":"Amount of decrease to accumulated depreciation for real estate investments sold for entities with a substantial portion of business acquiring and holding investment real estate.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":7000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":7000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":7000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":1145000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":1145000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":1145000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":56000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":56000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":56000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":912000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":912000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":912000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":102474000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":102474000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":102474000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":17307000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":17307000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":17307000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":15362000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":15362000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":15362000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":14000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":14000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":14000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":20516000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":20516000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":20516000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":6531000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":6531000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":6531000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":3545000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":3545000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":3641000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"RealEstateAndAccumulatedDepreciationAccumulatedDepreciation":{"label":"Real Estate and Accumulated Depreciation, Accumulated Depreciation (Deprecated 2013-01-31)","description":"The amount of accumulated depreciation for the property as of the balance sheet date.","units":{"USD":[{"end":"2012-12-31","val":8521000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"}]}},"RealEstateAndAccumulatedDepreciationAmountOfEncumbrances":{"label":"SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances","description":"Amount of lien or mortgage outstanding on real estate investment properties for entities with a substantial portion of business acquiring and holding investment real estate.","units":{"USD":[{"end":"2012-12-31","val":33751000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"}]}},"RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements":{"label":"SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount","description":"Amount before accumulated depreciation of buildings and improvements for entities with a substantial portion of business acquiring and holding investment real estate. Excludes real estate not held as an investment or interest.","units":{"USD":[{"end":"2012-12-31","val":232741000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"},{"end":"2018-12-31","val":573222000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"},{"end":"2023-12-31","val":1008747000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-12-31","val":848146000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"}]}},"RealEstateAndAccumulatedDepreciationCarryingAmountOfLand":{"label":"SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount","description":"Amount of land for entities with a substantial portion of business acquiring and holding investment real estate. Excludes real estate not held as an investment or interest.","units":{"USD":[{"end":"2012-12-31","val":93413000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"},{"end":"2018-12-31","val":157740000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"},{"end":"2023-12-31","val":253342000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-12-31","val":198074000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"}]}},"RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovements":{"label":"Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements (Deprecated 2013-01-31)","description":"Gross amount at which land and buildings and improvements are carried at the end of the period for each property.","units":{"USD":[{"end":"2012-12-31","val":326154000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"}]}},"RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts":{"label":"SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost","description":"Amount of cost capitalized subsequent to acquisition for real estate investment property, including, but not limited to, real estate tax and insurance, by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate. Excludes initial purchase price and improvement, and real estate not held as investment or interest.","units":{"USD":[{"end":"2012-12-31","val":8144000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"},{"end":"2018-12-31","val":47825000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"},{"end":"2024-12-31","val":-82339000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"}]}},"RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements":{"label":"SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements","description":"Initial cost of buildings and improvements for entities with a substantial portion of business acquiring and holding investment real estate. Excludes real estate not held as an investment or interest.","units":{"USD":[{"end":"2012-12-31","val":226690000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"},{"end":"2018-12-31","val":546109000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"},{"end":"2023-12-31","val":1030740000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-12-31","val":929403000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"}]}},"RealEstateAndAccumulatedDepreciationInitialCostOfLand":{"label":"SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land","description":"Initial cost of land for entities with a substantial portion of business acquiring and holding investment real estate. Excludes real estate not held as an investment or interest.","units":{"USD":[{"end":"2012-12-31","val":91320000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"},{"end":"2018-12-31","val":137028000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"},{"end":"2023-12-31","val":235837000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"},{"end":"2024-12-31","val":199156000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"}]}},"RealEstateCostOfRealEstateSold":{"label":"SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Cost of Investment in Real Estate Sold","description":"Amount of real estate investments sold for entities with a substantial portion of business acquiring and holding investment real estate.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":1257000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":1257000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":1257000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":17931000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":17931000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":17931000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":1274000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":1274000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":1274000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":22098000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":22098000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":22098000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":664114000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":664114000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":664114000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":178068000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":178068000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":178068000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":140395000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":140395000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":140395000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":456000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":456000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":456000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":175691000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":175691000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":175691000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":111186000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":111186000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":111186000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":43303000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":43303000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":125630000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"RealEstateFederalIncomeTaxBasis":{"label":"SEC Schedule III, Real Estate, Federal Income Tax Basis","description":"Cost basis of real estate investments for federal income tax purposes for entities with a substantial portion of business acquiring and holding investment real estate.","units":{"USD":[{"end":"2012-12-31","val":338000000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"},{"end":"2013-12-31","val":687600000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"},{"end":"2014-12-31","val":955800000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-12-31","val":957100000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-12-31","val":1300000000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-12-31","val":607200000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-12-31","val":866500000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"}]}},"RealEstateGrossAtCarryingValue":{"label":"SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross","description":"Amount, before accumulated depreciation, of real estate investment by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate. Excludes real estate not held as investment or interest.","units":{"USD":[{"end":"2010-12-31","val":4737000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2010-12-31","val":4737000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2010Q4I"},{"end":"2011-12-31","val":110335000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2011-12-31","val":110335000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2011-12-31","val":110335000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2011Q4I"},{"end":"2012-12-31","val":326154000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":326154000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2012-12-31","val":326154000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2012-12-31","val":326154000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2012Q4I"},{"end":"2013-12-31","val":668018000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":668018000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2013-12-31","val":668018000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2013-12-31","val":668018000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2013Q4I"},{"end":"2014-12-31","val":919259000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":919259000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2014-12-31","val":919259000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2014-12-31","val":919259000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2014Q4I"},{"end":"2015-12-31","val":914074000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":914074000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2015-12-31","val":914074000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2015-12-31","val":914074000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2015Q4I"},{"end":"2016-12-31","val":1227207000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":1227207000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2016-12-31","val":1227207000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2016-12-31","val":1227207000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2016Q4I"},{"end":"2017-12-31","val":574684000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":574684000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2017-12-31","val":574684000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2017-12-31","val":574684000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2017Q4I"},{"end":"2018-12-31","val":730962000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":730962000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2018-12-31","val":730962000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2018-12-31","val":730962000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2018Q4I"},{"end":"2019-12-31","val":824860000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":824860000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2019-12-31","val":824860000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2019-12-31","val":824860000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2019Q4I"},{"end":"2020-12-31","val":1517435000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":1517435000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2020-12-31","val":1517435000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2020-12-31","val":1517435000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2020Q4I"},{"end":"2021-12-31","val":1345240000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":1345240000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2021-12-31","val":1345240000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2021-12-31","val":1345240000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2021Q4I"},{"end":"2022-12-31","val":1361154000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":1361154000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2022-12-31","val":1361154000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022Q4I"},{"end":"2023-12-31","val":1262089000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":1262089000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-12-31","val":1046220000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"}]}},"RealEstateHeldforsale":{"label":"Real Estate Held-for-sale","description":"Carrying amount as of the balance sheet date of investments in land and buildings held for sale, excluding real estate considered to be inventory of the entity.","units":{"USD":[{"end":"2011-12-31","val":4496000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-12-31","val":3319000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":3319000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":3319000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":7009000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":17602000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":0,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":0,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":3539000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":1274000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":1274000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":0,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":0,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":0,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":7354000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":7354000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":9954000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":9954000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":0,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":0,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":0,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-12-31","val":46933000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":46933000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":569941000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":30645000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":30645000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":186694000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-06-30","val":30684000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":31252000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":31252000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":45553000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":45553000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":128146000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":0,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":14081000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4I"},{"end":"2020-12-31","val":140239000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":140239000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":154905000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-06-30","val":142306000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":5556000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":5556000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":96249000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":96249000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":0,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":2506000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":2506000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":34118000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":1411000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":2873000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":116572000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":123933000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":0,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":0,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":4491000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":2088000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":2349000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":55637000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":158378000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":780000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":39100000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":58475000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"RealEstateImprovements":{"label":"SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Improvements","description":"Amount of increase in real estate investments related to improvements for entities with a substantial portion of business acquiring and holding investment real estate.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":3896000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":3896000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":8284000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":8284000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":8284000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":24670000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":24670000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":24670000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":36942000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":36942000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":36942000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":32385000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":32385000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":32385000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-12-31","val":33909000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":33909000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":33909000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":37219000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":37219000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":37219000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":31818000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":31818000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":31818000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":34435000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":34435000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":34435000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":17103000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":17103000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":17103000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":18966000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":18966000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":18966000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":31407000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":31407000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":31407000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":24359000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":24359000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":25163000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"RealEstateInvestmentPropertyAccumulatedDepreciation":{"label":"Real Estate Investment Property, Accumulated Depreciation","description":"The cumulative amount of depreciation for real estate property held for investment purposes.","units":{"USD":[{"end":"2011-12-31","val":2583000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":2583000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":2576000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-06-30","val":4943000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":6176000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":8451000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":8451000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":8451000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":8180000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":7615000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":12035000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":17242000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":24051000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":29859000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":29859000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":29859000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":29859000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":29859000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":40228000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":47510000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":55225000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":64171000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":63388000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":63388000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":63388000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":63388000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":71151000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":79476000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":84819000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":91560000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":91560000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":91560000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":91560000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":91560000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":97273000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":104828000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":113594000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":120176000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":120176000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":113429000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":113429000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":32052000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":130764000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":132190000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":131566000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":41817000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":41817000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":37154000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":37154000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":25614000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":46751000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":48690000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":56749000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":46301000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":46301000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":43742000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":43742000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":38052000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":52902000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":57925000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":66332000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":65381000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":65381000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":65381000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":65381000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":65381000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":74128000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":80816000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":88290000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":104412000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":104412000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":85940000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":85940000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":85940000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":119200000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":111822000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":119265000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":130441000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":127280000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":127280000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":124876000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":124876000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":137932000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":148079000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":134645000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":141750000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":141750000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":141554000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":141554000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":140213000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":147475000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":153073000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":161599000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":167335000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":167157000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":167157000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":155639000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":154613000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":152050000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":149794000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":153873000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":161895000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":161865000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":160134000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":113212000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":170550000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":120902000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":73573000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"RealEstateInvestmentPropertyAtCost":{"label":"Real Estate Investment Property, at Cost","description":"Amount of real estate investment property which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.","units":{"USD":[{"end":"2011-12-31","val":110335000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":110335000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":105832000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-06-30","val":110219000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":205914000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":322765000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":322765000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":322765000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":318804000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":307646000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":401135000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":487392000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":620209000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":668018000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":668018000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":668018000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":666744000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":666744000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":895290000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":898273000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":907691000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":919259000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":911122000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":911122000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":908522000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":908522000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":915738000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":919899000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":917251000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":914074000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":914074000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":914074000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":914074000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":914074000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":916114000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":1045072000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":1223019000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":1227207000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":1227207000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":1173527000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":1173527000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":569142000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":1322891000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":1267633000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":1177237000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":574684000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":574684000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":539376000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":539376000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":371787000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":815265000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":860028000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":860828000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":696169000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":696169000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":679309000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":679309000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":591026000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":705387000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":789806000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":795255000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":824860000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":824860000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":824860000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":824860000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":824860000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":829588000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":849230000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":910788000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":1517435000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":1517435000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":1358724000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":1358724000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":1344058000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":1523547000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":1351869000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":1338796000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":1345240000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":1336523000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":1336523000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":1243426000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":1243426000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":1340166000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":1342558000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":1368842000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":1361154000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":1361154000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":1358452000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":1358452000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":1325499000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":1338227000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":1315191000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":1288397000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":1262089000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":1260500000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":1259038000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":1133821000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":1125434000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":1205926000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":1177801000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":1071728000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":1043886000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":1043595000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":988576000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":838913000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":1046720000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":899823000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":719444000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"RealEstateInvestmentPropertyNet":{"label":"Real Estate Investment Property, Net","description":"Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.","units":{"USD":[{"end":"2010-12-31","val":4547000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":4547000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":4547000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":35302000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":42290000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":107752000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":107752000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":107752000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":107752000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":103256000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":106009000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":105276000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":199738000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":314314000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":314314000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":314314000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":310624000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":300031000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":389100000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":470150000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":596158000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":638159000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":638159000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":638159000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":636885000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":636885000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":855062000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":850763000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":852466000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":855088000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":847734000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":847734000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":845134000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":845134000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":844587000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":840423000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":832432000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":822514000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":822514000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":822514000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":822514000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":822514000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":818841000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":940244000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":1109425000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":1107031000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":1107031000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":1060098000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":1060098000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":537090000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":1192127000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":1135443000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":1045671000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":532867000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":532867000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":502222000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":502222000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":346173000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":768514000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":811338000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":804079000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":649868000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":649868000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":635567000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":635567000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":552974000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":652485000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":731881000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":728923000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":759479000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":759479000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":759479000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":759479000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":759479000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":755460000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":768414000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":822498000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":1413023000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":1413023000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":1272784000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":1272784000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":1258118000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":1404347000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":1240047000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":1219531000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":1214799000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":1209243000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":1209243000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":1118550000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":1118550000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":1202234000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":1194479000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":1234197000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":1219404000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":1219404000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":1216898000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":1216898000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":1185286000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":1190752000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":1162118000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":1126798000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":1094754000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":1093343000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":1091881000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":978182000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":970821000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":1053876000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":1028007000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":917855000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":881991000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":881730000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":828442000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":725701000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":876170000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":778921000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":645871000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"RealEstateInvestmentsUnconsolidatedRealEstateAndOtherJointVentures":{"label":"Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures","description":"The carrying amount of investments in unconsolidated real estate and other joint ventures not separately presented. This includes direct and indirect investments.","units":{"USD":[{"end":"2011-12-31","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-06-30","val":8000000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":7926000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":7926000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":7926000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":7926000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":7926000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":7926000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":7882000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":7882000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":7882000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":16338000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":16338000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":16338000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":16338000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":16338000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":16170000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":74219000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":73968000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":72045000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":72045000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":72045000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":72045000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":72045000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":72667000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":73389000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":74619000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":74437000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":74437000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":74437000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":74437000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":74437000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":74841000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":75889000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":76118000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":75849000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":75849000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":75849000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":75849000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":75849000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":16538000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":14916000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":58329000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":55577000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":55577000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":55577000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":55577000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":55577000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":52813000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":50986000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":47304000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":44869000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":44869000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":44869000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":44869000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":44869000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":47373000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":51956000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":51537000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":78276000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":78276000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":78276000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":78276000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":78276000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":77610000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":78478000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":69686000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":79666000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":79666000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":79666000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":79666000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":79666000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":80889000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":83825000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":83854000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":88256000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":88256000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":88256000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":88256000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":88256000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":88934000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":107339000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":72838000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":70842000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":70842000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":70842000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":70842000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":70842000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":67253000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":52509000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":70379000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":45901000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":45901000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":45901000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":45901000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":45901000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":53345000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":66136000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":80909000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":88087000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":88087000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":88087000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":88087000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":80477000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":72835000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":64166000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"RealEstateOtherAcquisitions":{"label":"SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Other Acquisition","description":"Amount of increase in real estate investments from acquisitions other than through foreclosure for entities with a substantial portion of business acquiring and holding investment real estate.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":102470000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":102470000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":212152000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":212152000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":212152000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":342985000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":342985000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":342985000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":227339000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":227339000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":227339000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-12-31","val":300382000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":300382000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":300382000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":170505000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":170505000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":170505000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":312457000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":312457000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":312457000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":200918000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":200918000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":200918000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":679042000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":679042000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":679042000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":4838000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":4838000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":4838000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":142118000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":142118000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":142118000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"RealEstateOtherDeductions":{"label":"SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Other Deduction","description":"Amount of other deductions to real estate investments, excluding sales, for entities with a substantial portion of business acquiring and holding investment real estate.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":768000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":768000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":3360000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":3360000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":3360000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":5835000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":5835000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":5835000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":10362000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":10362000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":10362000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":13212000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":13212000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":13212000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-12-31","val":19220000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":19220000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":19220000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":18735000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":18735000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":18735000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":7329000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":7329000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":7329000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":1060000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":1060000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":1060000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":3114000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":3114000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":3114000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":5956000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":5956000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":5956000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":9454000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":9454000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":9454000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":5332000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":5332000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":1408000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"RealEstateTaxesAndInsurance":{"label":"Real Estate Taxes and Insurance","description":"The aggregate total of real estate taxes and insurance expense.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-04-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":11000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-07-01","end":"2010-09-30","val":11000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":46000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":46000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":56000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":196000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":196000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":140000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-04-01","end":"2011-06-30","val":140000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":457000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":457000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":261000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-07-01","end":"2011-09-30","val":261000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":888000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":855000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":800000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":547000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":501000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":1185000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":1097000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":638000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":596000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":1742000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":1541000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":557000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":497000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":2664000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":2476000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":2476000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":1493000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":1395000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":3789000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":3593000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":2296000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":2198000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":6459000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":6355000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":2715000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":2762000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":9282000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":9282000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":9282000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":3494000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":3494000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":6920000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":6920000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":3426000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":3426000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":10329000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":10329000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":3409000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":3409000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":14189000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":14189000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":14189000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":3659000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":3659000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":7498000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":7498000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":3839000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":3839000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":11439000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":11439000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":3940000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":3940000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":14565000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":14565000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":14565000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":3874000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":3874000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":7903000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":7903000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":4029000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":4029000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":12419000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":12419000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":4516000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":4516000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":16887000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":16887000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":16887000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":4737000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":4737000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":10152000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":10152000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":5415000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":5415000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":14932000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":14932000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":4780000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":4780000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":17404000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":17404000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":17404000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":2339000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":2339000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":5773000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":5773000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":3435000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":3435000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":8982000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":8982000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":3208000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":3208000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":11762000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":11762000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":11762000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":2977000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":2977000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":6279000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":6279000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":3301000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":3301000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":9556000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":9556000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":3278000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":3278000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":12631000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":12631000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":12631000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":3428000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":3428000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":6779000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":6779000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":3351000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":3351000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":10570000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":10570000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":3791000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":3791000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":15702000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":15702000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":15702000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":5289000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":5289000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":10688000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":10688000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":5399000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":5399000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":15949000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":15949000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":5262000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":5262000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":20768000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":20768000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":20768000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":5024000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":5024000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":10103000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":10103000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":5079000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":5079000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":15753000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":15753000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":5650000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":5650000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":21132000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":21132000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":21132000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":6416000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":6416000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":12260000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":12260000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":5843000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":5843000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":18541000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":18541000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":6281000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":6281000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":28300000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":28300000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":6477000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":6477000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":13031000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":13031000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":6556000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":6556000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":18649000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":18649000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":5618000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":5618000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":23410000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":5481000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":10903000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":5420000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":15466000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":4564000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"RecognitionOfDeferredRevenue":{"label":"Recognition of Deferred Revenue","description":"The amount of previously reported deferred or unearned revenue that was recognized as revenue during the period. For cash flows, this element primarily pertains to amortization of deferred credits on long-term arrangements. As a noncash item, it is deducted from net income when calculating cash provided by or used in operations using the indirect method.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-3000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":21000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":21000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":-63000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":63000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":-207000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":207000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":207000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-334000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":334000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":760000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":760000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":1215000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":1215000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":1932000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":1932000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":1932000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":891000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":891000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":2024000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":2024000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":3355000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":3355000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":4694000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":4694000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":4694000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":2427000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":2427000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":4799000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":4799000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":6884000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":6884000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":8392000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":8392000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":8392000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":1379000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":1379000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":2734000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":2734000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":3708000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":3708000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":4499000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":4499000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":4499000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":556000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":556000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":975000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":975000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":2020000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":2020000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":3084000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":3084000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":3084000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":925000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":925000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":1370000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":1370000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":1678000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-12-31","val":2416000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":2416000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":745000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":1670000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-12-31","val":4736000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018"}]}},"RedeemableNoncontrollingInterestEquityCarryingAmount":{"label":"Redeemable Noncontrolling Interest, Equity, Carrying Amount","description":"As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.","units":{"USD":[{"end":"2019-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-12-31","val":2968000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":2968000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-12-31","val":2822000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":2822000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"}]}},"RedeemableNoncontrollingInterestEquityCommonCarryingAmount":{"label":"Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount","description":"As of the reporting date, the carrying amount of noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. The noncontrolling interest holder's ownership (or holders' ownership) may be in the form of common shares (regardless of class), limited partnership units (regardless of class), non-preferential membership interests, or any other form of common equity regardless of investee entity legal form.","units":{"USD":[{"end":"2019-12-31","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q4I"},{"end":"2020-09-30","val":3001000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":2968000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":2968000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":2968000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q4I"},{"end":"2021-03-31","val":2936000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":2887000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":2855000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":2822000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":2822000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":2822000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q4I"},{"end":"2022-03-31","val":5006000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"}]}},"RedeemableNoncontrollingInterestEquityOtherCarryingAmount":{"label":"Redeemable Noncontrolling Interest, Equity, Other, Carrying Amount","description":"Amount of noncontrolling interests which are redeemable by the parent entity, classified as other equity.","units":{"USD":[{"end":"2018-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-12-31","val":12089000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":12089000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":12089000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":12089000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q4I"},{"end":"2020-03-31","val":12089000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":12089000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":12089000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":11009000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":11009000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":11009000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q4I"},{"end":"2021-03-31","val":11009000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":11009000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"}]}},"RepaymentsOfNotesPayable":{"label":"Repayments of Notes Payable","description":"The cash outflow for a borrowing supported by a written promise to pay an obligation.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":2869000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":2869000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":2896000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":2896000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":2896000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":2896000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":2896000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":2896000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":2896000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":5207000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":5207000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":11207000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":11207000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":33227000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":33227000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":36084000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":36084000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":36084000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":120000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":120000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":33067000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":33067000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":34043000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":34043000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":59203000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":59203000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":59203000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":4813000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":4813000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":30016000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":30016000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-09-30","val":30314000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":30314000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":40631000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":40631000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":40631000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":13645000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":13645000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":58196000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":58196000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":74707000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":74707000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":154802000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":154802000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":154802000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":35808000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":35808000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":69019000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":69019000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":73907000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":73907000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":477089000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":477089000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":477089000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":857000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":857000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":5711000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":5711000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":34348000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":34348000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":152516000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":152516000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":152516000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":54266000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":54266000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":62508000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":62508000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":73250000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":73250000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":126603000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":126603000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":126603000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":56820000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":56820000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":57149000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":57149000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":57611000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":57611000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":70649000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":70649000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":70649000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":61300000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":61300000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":131672000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":131672000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":233964000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":233964000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":473133000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":473133000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":55066000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":55066000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":61613000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":61613000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":190515000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":192268000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":2841000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":56922000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"}]}},"RestrictedCashAndCashEquivalents":{"label":"Restricted Cash and Cash Equivalents","description":"Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.","units":{"USD":[{"end":"2011-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011Q4I"},{"end":"2012-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"},{"end":"2013-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-12-31","val":0,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-12-31","val":0,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2021-12-31","val":21259000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021Q4I"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":61113000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2022-12-31","val":61113000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022Q4I"},{"end":"2023-12-31","val":56049000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":56049000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":56049000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":56049000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":56049000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":27872000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":39014000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":25425000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":42376000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":42376000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":42376000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":42376000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":39268000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":50634000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":51109000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"RestrictedCashAndCashEquivalentsAtCarryingValue":{"label":"Restricted Cash and Cash Equivalents, Current","description":"Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.","units":{"USD":[{"end":"2015-12-31","val":5807000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":5807000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":5807000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":5807000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":19428000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":21763000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":21436000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":24018000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":24018000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":24018000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":24018000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":24018000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":23348000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":21497000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":16086000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":10670000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":10670000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":10670000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":10670000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":10670000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":11453000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":11008000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":12525000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":10342000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":10342000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":10342000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":10342000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":10342000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":9497000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":10886000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":11009000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":12002000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":12002000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":12002000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":12002000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":12002000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":10977000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":12262000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":11721000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":13984000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":13984000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":13984000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":13984000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":13984000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":17371000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":25785000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":28201000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":21259000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":21259000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":21259000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":21259000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":21259000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":38123000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":62406000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":57325000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":61113000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":61113000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":61113000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":61113000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":44627000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":45984000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":51763000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"}]}},"RetainedEarningsAccumulatedDeficit":{"label":"Retained Earnings (Accumulated Deficit)","description":"The cumulative amount of the reporting entity's undistributed earnings or deficit.","units":{"USD":[{"end":"2010-12-31","val":-1982000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":-1982000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":-1982000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":-4362000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":-6205000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":-15968000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":-15968000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":-15968000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":-15968000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":-15968000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":-17298000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":-20685000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":-35844000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":-38615000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":-38615000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":-38615000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":-38615000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":-38615000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":-40780000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":-43122000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":-35777000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":-52801000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":-52801000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":-52801000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":-52801000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":-52801000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":-65355000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":-74029000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":-81533000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":-91691000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":-91691000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":-91691000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":-91691000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":-91691000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":-95003000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":-99097000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":-105144000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":-111527000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":-111527000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":-111527000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":-111527000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":-111527000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":-121893000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":-129321000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":-149799000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":-162289000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":-162289000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":-162289000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":-162289000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":-162289000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":-176628000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":-158080000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":-173964000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":-155454000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":-155454000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":-155454000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":-155454000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":-155454000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":-152551000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":-143397000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":-107770000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":-256984000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":-256984000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":-256984000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":-256984000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":-256984000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":-240781000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":-247603000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":-247401000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":-277196000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":-277196000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":-277196000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":-277196000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":-277196000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":-295764000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":-292096000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":-299589000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":-325720000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":-325720000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":-325720000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":-325720000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":-325720000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":-319208000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":-297533000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":-322049000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":-347691000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":-347691000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":-347691000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":-347691000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":-347691000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":-453770000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":-464506000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":-494998000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":-495782000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":-495782000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":-495782000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":-495782000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":-495782000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":-515363000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":-572838000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":-633070000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":-639933000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":-639933000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":-639933000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":-639933000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":-639933000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":-716406000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":-760627000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":-804352000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":-740770000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":-740770000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":-740770000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":-740770000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":-760569000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":-867203000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":-984919000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"RevenueFromContractWithCustomerExcludingAssessedTax":{"label":"Revenue from Contract with Customer, Excluding Assessed Tax","description":"Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.","units":{"USD":[{"start":"2019-01-01","end":"2019-06-30","val":2902000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":1509000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":4219000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":1317000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2020-01-01","end":"2020-06-30","val":1831000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":801000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":2722000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":888000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3"}]}},"RevenueFromContractWithCustomerIncludingAssessedTax":{"label":"Revenue from Contract with Customer, Including Assessed Tax","description":"Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.","units":{"USD":[{"start":"2017-01-01","end":"2017-12-31","val":7136000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":735000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":2214000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":1479000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":3640000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":1426000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":5021000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":1393000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":1393000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":2902000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":1509000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":4219000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":1317000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":5327000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":971000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1"}]}},"Revenues":{"label":"Revenues","description":"Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-04-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":75000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-07-01","end":"2010-09-30","val":75000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":308000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":308000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":337000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2011-01-01","end":"2011-03-31","val":337000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":946000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":946000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":609000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-04-01","end":"2011-06-30","val":609000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":609000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":2135000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":2135000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":1189000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-07-01","end":"2011-09-30","val":1189000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":1189000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":4278000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":4175000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":3901000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2011-10-01","end":"2011-12-31","val":2040000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4"},{"start":"2012-01-01","end":"2012-03-31","val":3576000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":3573000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-03-31","val":3573000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2012-01-01","end":"2012-03-31","val":3430000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":6892000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":6888000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":3316000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":3315000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-04-01","end":"2012-06-30","val":3315000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":3166000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":11578000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":11133000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":4686000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":4686000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-07-01","end":"2012-09-30","val":4537000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":4509000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":19904000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":18880000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":18880000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2012-10-01","end":"2012-12-31","val":8330000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-10-01","end":"2012-12-31","val":7775000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4"},{"start":"2013-01-01","end":"2013-03-31","val":10970000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":10463000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-03-31","val":10463000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2013-01-01","end":"2013-03-31","val":10463000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":25795000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":24824000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":14825000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":14361000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-04-01","end":"2013-06-30","val":14361000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":14361000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":49042000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":48106000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":23532000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":23281000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-07-01","end":"2013-09-30","val":23281000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":23281000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":68496000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":68496000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":68496000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2013-10-01","end":"2013-12-31","val":20391000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-10-01","end":"2013-12-31","val":20391000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4"},{"start":"2014-01-01","end":"2014-03-31","val":24626000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":24626000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-03-31","val":24626000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2014-01-01","end":"2014-03-31","val":24626000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":50871000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":50871000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":26244000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":26244000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-04-01","end":"2014-06-30","val":26244000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":26244000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":78469000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":78469000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":27598000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":27598000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-07-01","end":"2014-09-30","val":27598000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":27598000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":106154000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":106154000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":106154000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2014-10-01","end":"2014-12-31","val":27686000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-10-01","end":"2014-12-31","val":27686000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4"},{"start":"2015-01-01","end":"2015-03-31","val":27943000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":27943000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-03-31","val":27943000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2015-01-01","end":"2015-03-31","val":27943000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":56610000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":56610000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":28667000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":28667000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-04-01","end":"2015-06-30","val":28667000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":28667000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":84769000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":84769000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":28158000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":28158000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-07-01","end":"2015-09-30","val":28158000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":28158000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":112128000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":112128000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":112128000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2015-10-01","end":"2015-12-31","val":27360000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-10-01","end":"2015-12-31","val":27360000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4"},{"start":"2016-01-01","end":"2016-03-31","val":28365000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":28365000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-03-31","val":28365000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2016-01-01","end":"2016-03-31","val":28365000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":62232000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":62232000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":33866000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":33866000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-04-01","end":"2016-06-30","val":33866000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":33866000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":98365000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":98365000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":36133000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":36133000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-07-01","end":"2016-09-30","val":36133000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":36133000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":134244000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":134244000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":134244000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2016-10-01","end":"2016-12-31","val":35880000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-10-01","end":"2016-12-31","val":35880000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4"},{"start":"2017-01-01","end":"2017-03-31","val":37996000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":37996000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-03-31","val":37996000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2017-01-01","end":"2017-03-31","val":37996000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":78233000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":78233000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":40237000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":40237000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-04-01","end":"2017-06-30","val":40237000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":40237000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":114648000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":114648000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":36414000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":36414000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-07-01","end":"2017-09-30","val":36414000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":36414000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":140714000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":140714000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":140714000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2017-10-01","end":"2017-12-31","val":26067000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-10-01","end":"2017-12-31","val":26067000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4"},{"start":"2018-01-01","end":"2018-03-31","val":19636000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":19636000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-03-31","val":19636000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2018-01-01","end":"2018-03-31","val":19636000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":44925000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":44925000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":25290000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":25290000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-04-01","end":"2018-06-30","val":25290000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":25290000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":72082000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":72082000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":27156000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":27156000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-07-01","end":"2018-09-30","val":27156000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":27156000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":95787000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":95787000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":95787000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2018-10-01","end":"2018-12-31","val":23705000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-10-01","end":"2018-12-31","val":23705000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4"},{"start":"2019-01-01","end":"2019-03-31","val":21911000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":21911000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-03-31","val":21911000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":43600000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":43600000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":21689000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":21689000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-04-01","end":"2019-06-30","val":21689000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":68881000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":68881000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":25282000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":25282000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-07-01","end":"2019-09-30","val":25282000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":93158000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":93158000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":93158000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2019-10-01","end":"2019-12-31","val":24276000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2019Q4"},{"start":"2020-01-01","end":"2020-03-31","val":24601000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":24601000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":48121000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":48121000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":23521000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":23521000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":75869000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":75869000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":27745000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":27745000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":114025000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":114025000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":114025000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":38944000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":38944000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":83430000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":83430000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":44488000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":44488000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":129201000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":129201000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":45769000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":45769000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":167927000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":167927000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":167927000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":38527000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":38527000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":82065000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":82065000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":43539000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":43539000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":125671000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":125671000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":43605000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":43605000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":162058000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":162058000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":162058000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":38127000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":38127000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":74021000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":74021000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":35896000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":35896000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":109868000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":109868000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":35846000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":35846000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":145416000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":145416000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":35001000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":35001000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":68811000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":68811000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":33809000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":33809000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":101247000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":101247000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":32437000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":32437000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":133525000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":32105000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":63575000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":31469000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":92068000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":28494000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense":{"label":"SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation, Depreciation Expense","description":"Amount of depreciation expense of real estate investments for entities with a substantial portion of business acquiring and holding investment real estate.","units":{"USD":[{"start":"2012-01-01","end":"2012-12-31","val":9305000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":28956000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":28956000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":44848000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":44848000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":44848000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":41513000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":41513000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":41513000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-12-31","val":47836000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":47836000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":47836000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":48994000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":48994000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":48994000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":32661000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":32661000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":32661000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":31961000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":31961000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":31961000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":42159000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":42159000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":42159000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":55882000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":55882000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":55882000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":49190000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":49190000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":49190000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":44258000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":44258000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":37759000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"SecuritiesSoldUnderAgreementsToRepurchase":{"label":"Securities Sold under Agreements to Repurchase","description":"Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset.","units":{"USD":[{"end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-12-31","val":46400000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2011-12-31","val":46400000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":46400000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":46400000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":46400000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2012-03-31","val":44500000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":27700000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"}]}},"StockholdersEquity":{"label":"Stockholders' Equity Attributable to Parent","description":"Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.","units":{"USD":[{"end":"2009-12-31","val":193000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2009Q4I"},{"end":"2010-12-31","val":41058000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":41058000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":41058000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2011-06-30","val":92663000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":121559000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":173025000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":173025000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":173025000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":173025000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":173025000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-03-31","val":207978000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":254440000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":311914000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":467860000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":467860000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":467860000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":467860000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":467860000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":465638000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":463228000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":470566000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":459822000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":459822000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":459822000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":459822000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":459822000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":448211000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":439536000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":432032000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":433398000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":433398000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":433398000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":433398000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":433398000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":430086000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":425992000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":402945000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":393363000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":393363000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":393363000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":393363000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":393363000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":382741000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":351627000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":306150000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":293652000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":293652000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":293652000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":293652000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":293652000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":279160000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":298556000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":235538000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":259013000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":259013000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":259013000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":259013000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":259013000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":387068000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":292085000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":321394000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":291454000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":291454000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":291454000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":291454000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":291454000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":307660000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":300827000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":301010000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":276633000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":276633000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":276633000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":276633000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":276633000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":258065000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":261726000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":254233000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":506554000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":506554000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":506554000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":506554000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":506554000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":513066000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":532740000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":499275000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":471690000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":471690000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":471690000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":471690000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":471690000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":461735000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":451000000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":415576000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":412301000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":412301000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":412301000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":412301000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":412301000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":392720000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":333244000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":269012000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":262149000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":262149000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":262149000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":262149000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":262149000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":185676000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":139455000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":95360000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":158942000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":158942000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":158942000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":158942000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":139143000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":32429000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":-85287000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest":{"label":"Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest","description":"Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.","units":{"USD":[{"end":"2008-12-31","val":200000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2008Q4I"},{"end":"2009-12-31","val":193000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2009-12-31","val":193000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2009-12-31","val":193000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2009Q4I"},{"end":"2010-12-31","val":41058000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2010-12-31","val":41058000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2010-12-31","val":41058000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2010-12-31","val":41058000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2010-12-31","val":41058000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2010-12-31","val":41058000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2010Q4I"},{"end":"2011-09-30","val":122917000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":186544000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2011-12-31","val":186544000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"end":"2011-12-31","val":186544000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":186544000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":186544000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2011-12-31","val":186544000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2011-12-31","val":186544000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2011-12-31","val":186544000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2011-12-31","val":186544000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2011-12-31","val":186544000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2011Q4I"},{"end":"2012-03-31","val":222572000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"},{"end":"2012-06-30","val":269013000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":326447000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":483652000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":483652000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":483652000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":483652000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":483652000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2012-12-31","val":483652000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2012-12-31","val":483652000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2012-12-31","val":483652000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2012-12-31","val":483652000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2012-12-31","val":483652000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2012Q4I"},{"end":"2013-03-31","val":481902000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":479633000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":484951000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":474686000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":474686000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":474686000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":474686000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":474686000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2013-12-31","val":474686000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2013-12-31","val":474686000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2013-12-31","val":474686000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2013-12-31","val":474686000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2013-12-31","val":474686000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2013Q4I"},{"end":"2014-03-31","val":464273000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":455323000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":448689000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":450136000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":450136000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":450136000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":450136000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":450136000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2014-12-31","val":450136000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2014-12-31","val":450136000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2014-12-31","val":450136000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2014-12-31","val":450136000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2014-12-31","val":450136000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2014Q4I"},{"end":"2015-03-31","val":446173000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":443313000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":418911000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":408790000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":408790000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":408790000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":408790000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":408790000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2015-12-31","val":408790000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2015-12-31","val":408790000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2015-12-31","val":408790000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2015-12-31","val":408790000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2015-12-31","val":408790000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2015Q4I"},{"end":"2016-03-31","val":397812000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":353691000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":308098000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":295550000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":295550000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":295550000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":295550000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":295550000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2016-12-31","val":295550000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2016-12-31","val":295550000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2016-12-31","val":295550000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2016-12-31","val":295550000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2016-12-31","val":295550000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2016Q4I"},{"end":"2017-03-31","val":281086000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":300452000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":237558000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":260983000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":260983000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":260983000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":260983000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":260983000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2017-12-31","val":260983000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2017-12-31","val":260983000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2017-12-31","val":260983000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2017-12-31","val":260983000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2017-12-31","val":260983000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2017Q4I"},{"end":"2018-03-31","val":389025000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2018-03-31","val":389025000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-03-31","val":389025000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":294733000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2018-06-30","val":294733000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-06-30","val":294733000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":323983000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2018-09-30","val":323983000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3I"},{"end":"2018-12-31","val":293964000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":293964000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":293964000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":293964000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":293964000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2018-12-31","val":293964000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2018-12-31","val":293964000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2018-12-31","val":293964000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2018-12-31","val":293964000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2018-12-31","val":293964000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2018Q4I"},{"end":"2019-03-31","val":309122000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2019-03-31","val":309122000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2019-03-31","val":309122000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-03-31","val":309122000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q1I"},{"end":"2019-06-30","val":302152000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2019-06-30","val":302152000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2019-06-30","val":302152000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-06-30","val":302152000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q2I"},{"end":"2019-09-30","val":301884000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2019-09-30","val":301884000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3I"},{"end":"2019-12-31","val":277388000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":277388000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":277388000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":277388000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":277388000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2019-12-31","val":277388000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2019-12-31","val":277388000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2019-12-31","val":277388000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2019-12-31","val":277388000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2019-12-31","val":277388000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2019Q4I"},{"end":"2020-03-31","val":258900000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2020-03-31","val":258900000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2020-03-31","val":258900000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-03-31","val":258900000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q1I"},{"end":"2020-06-30","val":262521000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2020-06-30","val":262521000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2020-06-30","val":262521000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-06-30","val":262521000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q2I"},{"end":"2020-09-30","val":254957000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2020-09-30","val":254957000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3I"},{"end":"2020-12-31","val":519712000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":519712000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":519712000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":519712000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":519712000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2020-12-31","val":519712000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2020-12-31","val":519712000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2020-12-31","val":519712000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2020-12-31","val":519712000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2020-12-31","val":519712000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2020Q4I"},{"end":"2021-03-31","val":525581000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2021-03-31","val":525581000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2021-03-31","val":525581000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-03-31","val":525581000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q1I"},{"end":"2021-06-30","val":545300000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2021-06-30","val":545300000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2021-06-30","val":545300000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-06-30","val":545300000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q2I"},{"end":"2021-09-30","val":510667000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2021-09-30","val":510667000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3I"},{"end":"2021-12-31","val":482059000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":482059000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":482059000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":482059000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":482059000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2021-12-31","val":482059000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2021-12-31","val":482059000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2021-12-31","val":482059000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2021-12-31","val":482059000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2021-12-31","val":482059000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2021Q4I"},{"end":"2022-03-31","val":471986000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2022-03-31","val":471986000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2022-03-31","val":471986000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-03-31","val":471986000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q1I"},{"end":"2022-06-30","val":461373000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2022-06-30","val":461373000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2022-06-30","val":461373000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-06-30","val":461373000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q2I"},{"end":"2022-09-30","val":418294000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2022-09-30","val":418294000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":416393000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":416393000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":416393000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":416393000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":416393000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2022-12-31","val":416393000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2022-12-31","val":416393000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2022-12-31","val":416393000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2022-12-31","val":416393000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022Q4I"},{"end":"2023-03-31","val":396623000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2023-03-31","val":396623000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2023-03-31","val":396623000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-03-31","val":396623000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q1I"},{"end":"2023-06-30","val":336528000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2023-06-30","val":336528000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2023-06-30","val":336528000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-06-30","val":336528000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":269954000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2023-09-30","val":269954000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":263364000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":263364000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":263364000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":263364000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":263364000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2023-12-31","val":263364000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2023-12-31","val":263364000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2023-12-31","val":263364000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2023Q4I"},{"end":"2024-03-31","val":186720000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2024-03-31","val":186720000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2024-03-31","val":186720000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-03-31","val":186720000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q1I"},{"end":"2024-06-30","val":138838000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2024-06-30","val":138838000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2024-06-30","val":138838000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-06-30","val":138838000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q2I"},{"end":"2024-09-30","val":92226000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2024-09-30","val":92226000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":155803000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":155803000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":155803000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":155803000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":135881000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2025-03-31","val":135881000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q1I"},{"end":"2025-06-30","val":28297000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2025-06-30","val":28297000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q2I"},{"end":"2025-09-30","val":-91559000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"StockIssuedDuringPeriodValueAcquisitions":{"label":"Stock Issued During Period, Value, Acquisitions","description":"Value of stock issued pursuant to acquisitions during the period.","units":{"USD":[{"start":"2020-01-01","end":"2020-12-31","val":292792000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":292792000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":292792000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"}]}},"StockIssuedDuringPeriodValueDividendReinvestmentPlan":{"label":"Stock Issued During Period, Value, Dividend Reinvestment Plan","description":"Value of stock issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the holder of the stock to reinvest dividends paid to them by the entity on new issues of stock by the entity.","units":{"USD":[{"start":"2009-11-20","end":"2012-06-30","val":4900000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2009-11-20","end":"2012-09-30","val":12600000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2009-11-20","end":"2012-12-31","val":12600000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2009-11-20","end":"2013-03-31","val":12600000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2009-11-20","end":"2013-06-30","val":15000000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2009-11-20","end":"2013-09-30","val":15000000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2009-11-20","end":"2013-12-31","val":29300000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2009-11-20","end":"2014-03-31","val":29300000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2009-11-20","end":"2014-06-30","val":33300000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2009-11-20","end":"2014-09-30","val":35900000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2009-11-20","end":"2014-12-31","val":39200000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2009-11-20","end":"2015-03-31","val":42600000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2009-11-20","end":"2015-06-30","val":46100000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2009-11-20","end":"2015-09-30","val":49400000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2009-11-20","end":"2015-12-31","val":52800000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2009-11-20","end":"2016-03-31","val":56000000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2009-11-20","end":"2016-06-30","val":59100000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2009-11-20","end":"2016-09-30","val":62300000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2009-11-20","end":"2016-12-31","val":65400000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2009-11-20","end":"2017-03-31","val":68300000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2009-11-20","end":"2017-06-30","val":71200000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2009-11-20","end":"2017-09-30","val":74000000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2009-11-20","end":"2017-12-31","val":74000000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2009-11-20","end":"2018-03-31","val":74500000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2009-11-20","end":"2018-06-30","val":75000000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2009-11-20","end":"2018-09-30","val":75500000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2009-11-20","end":"2018-12-31","val":75500000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2009-11-20","end":"2019-03-31","val":75700000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2009-11-20","end":"2019-06-30","val":76000000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2009-11-20","end":"2019-09-30","val":76300000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2009-11-20","end":"2019-12-31","val":76300000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2009-11-20","end":"2019-12-31","val":76500000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2009-11-20","end":"2020-03-31","val":76500000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2009-11-20","end":"2020-06-30","val":76500000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2009-11-20","end":"2020-09-30","val":76500000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2009-11-20","end":"2021-03-31","val":76500000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2009-11-20","end":"2021-06-30","val":76500000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2009-11-20","end":"2021-09-30","val":76500000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2009-11-20","end":"2021-12-31","val":76500000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2009-11-20","end":"2022-12-31","val":76500000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"}]}},"StockIssuedDuringPeriodValueNewIssues":{"label":"Stock Issued During Period, Value, New Issues","description":"Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":50400000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-12-31","val":50400000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":50400000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":50400000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":60517000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-09-30","val":97069000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-12-31","val":169166000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":169166000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2011-01-01","end":"2011-12-31","val":169166000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-12-31","val":169166000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":169166000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":169166000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":40826000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1"},{"start":"2009-11-20","end":"2012-06-30","val":314800000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":97257000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2009-11-20","end":"2012-09-30","val":403100000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":185581000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2009-11-20","end":"2012-11-14","val":561700000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2009-11-20","end":"2012-11-14","val":561700000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2009-11-20","end":"2012-11-14","val":561700000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2009-11-20","end":"2012-11-14","val":561700000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2009-11-20","end":"2012-11-14","val":561700000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2009-11-20","end":"2012-11-14","val":561700000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2009-11-20","end":"2012-11-14","val":561700000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2009-11-20","end":"2012-11-14","val":561700000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2009-11-20","end":"2012-11-14","val":561700000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2009-11-20","end":"2012-11-14","val":561700000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2009-11-20","end":"2012-11-14","val":561700000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2009-11-20","end":"2012-11-14","val":561700000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2009-11-20","end":"2012-11-14","val":561700000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2012-01-01","end":"2012-12-31","val":357334000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":357334000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2012-01-01","end":"2012-12-31","val":357334000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-12-31","val":357334000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":357334000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":357334000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2009-11-20","end":"2013-03-31","val":561800000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2009-11-20","end":"2013-06-30","val":561700000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":2340000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2009-11-20","end":"2013-09-30","val":561700000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":2340000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-12-31","val":16641000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":16641000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2013-01-01","end":"2013-12-31","val":16641000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-12-31","val":16641000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":16641000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":16641000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2009-11-20","end":"2014-03-31","val":561700000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2009-11-20","end":"2014-06-30","val":561700000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":4020000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2009-11-20","end":"2014-09-30","val":561700000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":6624000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-12-31","val":9911000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":9911000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2014-01-01","end":"2014-12-31","val":9911000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-12-31","val":9911000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":9911000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":9911000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2009-11-20","end":"2015-03-31","val":561700000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":3460000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2009-11-20","end":"2015-06-30","val":561700000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":6935000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2009-11-20","end":"2015-09-30","val":561700000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2009-11-20","end":"2015-09-30","val":561700000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2009-11-20","end":"2015-09-30","val":561700000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2009-11-20","end":"2015-09-30","val":561700000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-09-30","val":10269000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-12-31","val":13573000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":13573000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2015-01-01","end":"2015-12-31","val":13573000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-12-31","val":13573000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":13573000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":13573000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":3201000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":6361000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-09-30","val":9520000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":12616000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":12616000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2016-01-01","end":"2016-12-31","val":12616000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-12-31","val":12616000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":12616000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":12616000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2009-11-20","end":"2017-03-31","val":561700000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":2924000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1"},{"start":"2009-11-20","end":"2017-06-30","val":561700000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":5817000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-09-30","val":8666000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-12-31","val":8666000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":8666000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2017-01-01","end":"2017-12-31","val":8666000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-12-31","val":8666000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":8666000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":8666000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":479000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":479000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":964000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":964000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":485000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":1418000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":1418000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":454000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":1418000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":1418000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":1418000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":286000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":286000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":564000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":564000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":278000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":278000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":835000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":835000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":271000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":271000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":835000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":835000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":835000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":262000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":262000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":262000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":262000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":262000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":262000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":262000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":262000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":262000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"}]}},"StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures":{"label":"Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures","description":"Value of stock related to Restricted Stock Awards issued during the period, net of the stock value of such awards forfeited.","units":{"USD":[{"start":"2019-01-01","end":"2019-12-31","val":5440000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"}]}},"StockIssuedDuringPeriodValueStockDividend":{"label":"Stock Issued During Period, Value, Stock Dividend","description":"Value of stock issued to shareholders as a dividend during the period.","units":{"USD":[{"start":"2018-01-01","end":"2018-03-31","val":150299000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":150299000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":150299000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":150299000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":150299000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":150299000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":278210000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":278210000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":278210000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2022-01-01","end":"2022-03-31","val":0,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"}]}},"StockRedeemedOrCalledDuringPeriodValue":{"label":"Stock Redeemed or Called During Period, Value","description":"Equity impact of the value of stock bought back by the entity at the exercise price or redemption price.","units":{"USD":[{"start":"2011-01-01","end":"2011-09-30","val":40000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-12-31","val":40000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":40000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2011-01-01","end":"2011-12-31","val":40000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-12-31","val":40000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":40000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":40000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":204000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1"},{"start":"2009-11-20","end":"2012-06-30","val":300000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":290000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2009-11-20","end":"2012-09-30","val":600000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":542000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2009-11-20","end":"2012-12-31","val":800000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":755000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":755000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2012-01-01","end":"2012-12-31","val":755000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-01-01","end":"2012-12-31","val":755000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":755000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":755000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2009-11-20","end":"2013-03-31","val":900000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":100000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1"},{"start":"2009-11-20","end":"2013-06-30","val":1100000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":330000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2009-11-20","end":"2013-09-30","val":1500000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":753000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2009-11-20","end":"2013-12-31","val":3200000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":2450000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":2450000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2013-01-01","end":"2013-12-31","val":2450000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-01-01","end":"2013-12-31","val":2450000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":2450000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":2450000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2009-11-20","end":"2014-03-31","val":3800000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":594000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1"},{"start":"2009-11-20","end":"2014-06-30","val":5700000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":2511000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2009-11-20","end":"2014-09-30","val":6700000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":3487000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2009-11-20","end":"2014-12-31","val":8300000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":5104000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":5104000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2014-01-01","end":"2014-12-31","val":5104000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-12-31","val":5104000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":5104000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":5104000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2009-11-20","end":"2015-03-31","val":9500000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":1162000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2009-11-20","end":"2015-06-30","val":13600000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":5284000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2009-11-20","end":"2015-09-30","val":32400000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":24025000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2009-11-20","end":"2015-12-31","val":38400000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":30100000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":30100000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2015-01-01","end":"2015-12-31","val":30100000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-01-01","end":"2015-12-31","val":30100000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-01-01","end":"2015-12-31","val":30100000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":30100000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2009-11-20","end":"2016-03-31","val":41800000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":3412000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1"},{"start":"2009-11-20","end":"2016-06-30","val":45400000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":6999000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2009-11-20","end":"2016-09-30","val":69900000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":31454000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2009-11-20","end":"2016-12-31","val":77000000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":38573000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":38573000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2016-01-01","end":"2016-12-31","val":38573000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-12-31","val":38573000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":38573000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":38573000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2009-11-20","end":"2017-03-31","val":80800000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":3754000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1"},{"start":"2009-11-20","end":"2017-06-30","val":84500000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":7511000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2009-11-20","end":"2017-09-30","val":85000000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":8050000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2009-11-20","end":"2017-12-31","val":151800000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":74780000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":74780000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2017-01-01","end":"2017-12-31","val":74780000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-12-31","val":74780000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":74780000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":74780000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2009-11-20","end":"2018-03-31","val":156400000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":4610000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":4610000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2009-11-20","end":"2018-06-30","val":266900000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":115071000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":115071000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":110461000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2009-11-20","end":"2018-09-30","val":272300000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":120544000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":120544000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":5473000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2009-11-20","end":"2018-12-31","val":275400000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":123613000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":123613000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":123613000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"end":"2019-03-20","val":8600000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-03-20","val":8600000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-03-20","val":8600000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-03-20","val":8600000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-03-20","val":8600000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2019-03-20","val":8600000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2019-03-20","val":8600000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2019Q1I"},{"start":"2009-11-20","end":"2019-03-31","val":277900000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":2539000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":2539000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2009-11-20","end":"2019-06-30","val":280500000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":5107000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":5107000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":2568000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":2568000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2009-11-20","end":"2019-09-30","val":282800000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":7433000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":7433000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":2326000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":2326000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2009-11-20","end":"2019-12-31","val":285400000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2009-11-20","end":"2019-12-31","val":287600000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":10028000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":10028000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":10028000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2009-11-20","end":"2020-03-31","val":285900000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":468000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":468000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2009-11-20","end":"2020-06-30","val":286200000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":824000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":824000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":356000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":356000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2009-11-20","end":"2020-09-30","val":286300000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":830000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":830000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":6000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":6000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":2230000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":2230000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":2230000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2009-11-20","end":"2021-03-31","val":288500000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":853000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":853000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2009-11-20","end":"2021-06-30","val":289100000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":1436000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":1436000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":582000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":582000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2009-11-20","end":"2021-09-30","val":317300000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":29552000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":29552000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":28117000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":28117000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2009-11-20","end":"2021-12-31","val":318600000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2009-11-20","end":"2021-12-31","val":324100000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":31018000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":31018000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":31018000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":589000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":589000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":2274000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":2274000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":1685000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":1685000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":4587000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":4587000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":2313000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":2313000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":6016000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":6016000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":6016000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":1510000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":1510000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":3214000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":3214000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":1704000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":1704000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":5171000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":5171000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":1957000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":1957000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2009-11-20","end":"2023-12-31","val":330500000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":6425000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":6425000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":756000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":756000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":2357000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":2357000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":1601000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":1601000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":2882000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":2882000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":525000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":525000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":2882000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1":{"label":"Stock Repurchase Program, Remaining Authorized Repurchase Amount","description":"Amount remaining of a stock repurchase plan authorized.","units":{"USD":[{"end":"2015-12-31","val":13600000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2015Q4I"},{"end":"2016-12-31","val":12600000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2017-09-30","val":52000000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":8700000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":8500000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":2200000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":3000000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2019-03-31","val":7500000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":4900000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":2600000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2020-03-31","val":400000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":6000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2021-03-31","val":11000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":1400000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":3200000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"}]}},"SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions":{"label":"Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions","description":"Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.","units":{"pure":[{"start":"2013-01-10","end":"2013-01-11","val":0.9,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"}]}},"TemporaryEquityCarryingAmount":{"label":"Temporary Equity, Carrying Amount (Deprecated 2012-01-31)","description":"The carrying value (book value) of an entity's issued and outstanding stock which is not included within permanent equity in Stockholders Equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.","units":{"USD":[{"end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010Q4I"},{"end":"2010-12-31","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"end":"2011-09-30","val":1204000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2011Q3I"},{"end":"2011-12-31","val":5291000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q4I"},{"end":"2011-12-31","val":5291000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"end":"2012-03-31","val":5451000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1I"}]}},"TemporaryEquityCarryingAmountAttributableToParent":{"label":"Temporary Equity, Carrying Amount, Attributable to Parent","description":"Carrying amount, attributable to parent, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.","units":{"USD":[{"end":"2011-12-31","val":5291000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"end":"2011-12-31","val":5291000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":5291000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2011Q4I"},{"end":"2012-06-30","val":5809000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2I"},{"end":"2012-09-30","val":13293000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":9651000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"end":"2012-12-31","val":9651000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"end":"2012-12-31","val":9651000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":9651000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"end":"2012-12-31","val":9651000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":9551000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":11681000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":11258000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":17573000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"end":"2013-12-31","val":17573000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":17573000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"end":"2013-12-31","val":17573000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"end":"2013-12-31","val":17573000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2013Q4I"},{"end":"2014-03-31","val":15498000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":18147000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":19775000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2014Q3I"},{"end":"2014-12-31","val":9911000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"end":"2014-12-31","val":9911000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"end":"2014-12-31","val":9911000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"end":"2014-12-31","val":9911000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"end":"2014-12-31","val":9911000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2014Q4I"},{"end":"2015-03-31","val":12209000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1I"},{"end":"2015-06-30","val":11562000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2015Q2I"},{"end":"2015-09-30","val":13155000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2015Q3I"},{"end":"2015-12-31","val":9859000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":9859000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"end":"2015-12-31","val":9859000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"end":"2015-12-31","val":9859000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"end":"2015-12-31","val":9859000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":2161000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2016Q1I"},{"end":"2016-06-30","val":1574000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2016Q2I"},{"end":"2016-09-30","val":16639000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"end":"2016-12-31","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"end":"2016-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-03-31","val":0,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2017Q1I"},{"end":"2017-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2017Q2I"},{"end":"2017-09-30","val":52000000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":4518000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"end":"2017-12-31","val":4518000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"end":"2017-12-31","val":4518000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"end":"2017-12-31","val":4518000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"end":"2017-12-31","val":4518000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017Q4I"},{"end":"2018-03-31","val":8983000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":2720000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":0,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"},{"end":"2018-12-31","val":0,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"end":"2018-12-31","val":0,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"end":"2018-12-31","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"end":"2018-12-31","val":0,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2018Q4I"},{"end":"2019-03-31","val":0,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2019Q1I"},{"end":"2019-06-30","val":0,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":0,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2019Q3I"},{"end":"2019-12-31","val":15008000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"end":"2019-12-31","val":15008000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"end":"2019-12-31","val":15008000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"end":"2019-12-31","val":15008000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"end":"2019-12-31","val":15008000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019Q4I"},{"end":"2020-03-31","val":15233000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1I"},{"end":"2020-06-30","val":15233000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2I"},{"end":"2020-09-30","val":15233000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3I"},{"end":"2020-12-31","val":15233000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"end":"2020-12-31","val":15233000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"end":"2020-12-31","val":15233000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"end":"2020-12-31","val":15233000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":15233000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2020Q4I"},{"end":"2021-03-31","val":15233000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2021Q1I"},{"end":"2021-06-30","val":15233000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2021Q2I"},{"end":"2021-09-30","val":15233000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":15233000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"end":"2021-12-31","val":15233000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"end":"2021-12-31","val":15233000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":15233000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":15233000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":15233000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1I"},{"end":"2022-06-30","val":15233000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":15233000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"}]}},"TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests":{"label":"Temporary Equity, Carrying Amount, Including Portion Attributable to Noncontrolling Interests","description":"Carrying amount, attributable to parent and noncontrolling interests, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.","units":{"USD":[{"end":"2014-12-31","val":1000000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-12-31","val":1000000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"end":"2015-12-31","val":1000000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2015Q4I"},{"end":"2016-12-31","val":1000000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"end":"2016-12-31","val":1000000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2016Q4I"},{"end":"2017-09-30","val":1000000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3I"},{"end":"2017-12-31","val":1000000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2017Q4I"},{"end":"2018-03-31","val":1000000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1I"},{"end":"2018-06-30","val":1000000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"},{"end":"2018-09-30","val":1000000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2018Q3I"}]}},"TemporaryEquityRedemptionValue":{"label":"Temporary Equity, Redemption Value (Deprecated 2014-01-31)","description":"The aggregate amount to be paid by the entity upon redemption of the security that is classified as temporary equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.","units":{"USD":[{"end":"2012-12-31","val":1100000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2012Q4I"},{"end":"2013-12-31","val":900000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013Q4I"}]}},"TenantReimbursements":{"label":"Tenant Reimbursements (Deprecated 2018-01-31)","description":"In accordance with the provisions of their lease agreement, this element represents allowable charges due a landlord from its tenant. In retail store and office building leases, for example, tenant reimbursements may cover items such as taxes, utilities, and common area expenses.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-04-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":9000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-07-01","end":"2010-09-30","val":9000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":23000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2010-01-01","end":"2010-12-31","val":23000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":14000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":84000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":84000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":70000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-04-01","end":"2011-06-30","val":70000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":137000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":137000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":54000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-07-01","end":"2011-09-30","val":54000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":276000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-12-31","val":267000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":238000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":284000,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11"},{"start":"2012-01-01","end":"2012-03-31","val":284000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":540000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-06-30","val":540000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":256000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":256000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":1051000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-09-30","val":996000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":510000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":493000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":1690000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":1595000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":1595000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":968000,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":951000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":3208000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":3167000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":2240000,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":2216000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":6513000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":6508000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":3342000,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":3341000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":9964000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":9964000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":9964000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":3802000,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":3802000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":7624000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":7624000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":3822000,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":3822000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":12029000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":12029000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":4404000,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":4404000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":16273000,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":16273000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":16273000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":4310000,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":4310000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":9050000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":9050000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":4740000,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":4740000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":13991000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":13991000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":4940000,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":4940000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":18313000,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":18313000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":18313000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":4754000,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":4754000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":9582000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":9582000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":4828000,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":4828000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":15484000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":15484000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":5902000,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":5902000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":20762000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":20762000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":20762000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":5637000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":5637000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":12094000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":12094000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":6456000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":6456000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":18188000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":6094000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":21710000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":21710000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":2682000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":6384000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":3703000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-12-31","val":12621000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018"}]}},"UnrealizedGainLossOnDerivativesAndCommodityContracts":{"label":"Unrealized Gain (Loss) on Derivatives and Commodity Contracts","description":"The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of open derivatives, commodity, or energy contracts, held at each balance sheet date, that was included in earnings for the period.","units":{"USD":[{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":0,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":0,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-01-01","end":"2016-12-31","val":-3000,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":-3000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":-3000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":-57000,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":-57000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":-88000,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":-88000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-01-01","end":"2017-09-30","val":-102000,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":-102000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":-105000,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":-105000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":-105000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":31000,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":31000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-31000,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":-31000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":-21000,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":-21000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":-142000,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":-142000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":-142000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-30000,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":-30000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-37000,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":-37000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":-50000,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":-50000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-01-01","end":"2019-12-31","val":-50000,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":-50000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2019-01-01","end":"2019-12-31","val":-50000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":14000,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22"},{"start":"2020-01-01","end":"2020-03-31","val":14000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":21000,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":21000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-01-01","end":"2020-09-30","val":-10000,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-01-01","end":"2020-09-30","val":-10000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-01-01","end":"2020-12-31","val":-27000,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29"},{"start":"2020-01-01","end":"2020-12-31","val":-27000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":-27000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":-13000,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":-13000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":-16000,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":-16000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":-17000,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":-17000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":-11000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":-11000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":-11000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":55000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":55000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":270000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":270000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":1103000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":1103000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":1530000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":1530000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-36000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":328000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-09-30","val":378000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":165000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023"}]}},"WeightedAverageNumberOfDilutedSharesOutstanding":{"label":"Weighted Average Number of Shares Outstanding, Diluted","description":"The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.","units":{"shares":[{"start":"2009-01-01","end":"2009-12-31","val":20000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":419576,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-04-01","end":"2010-06-30","val":814762,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":966540,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-07-01","end":"2010-09-30","val":2042633,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":1678335,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":6002627,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":7401527,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":7401527,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":8785056,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-04-01","end":"2011-06-30","val":8785056,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":9368412,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":9368412,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":13238044,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-07-01","end":"2011-09-30","val":13238044,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":11432823,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":23974487,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":26586148,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":29197809,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":29732658,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":35958174,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3"},{"start":"2019-01-01","end":"2019-12-31","val":66443585,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":66041776,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":67650215,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":69258653,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":68179046,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":69225212,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":75407976,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":75407976,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":98036134,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":98036134,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":97991934,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":97991934,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":97948219,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":97948219,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":97879983,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":97879983,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":97659731,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":97659731,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":96967983,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":96967983,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":96967983,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":101419947,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":101419947,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":102929284,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":102929284,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":104422035,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":104422035,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":103351040,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":103351040,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":104180800,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":104180800,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":103522696,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":103522696,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":103522696,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":103872363,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":103872363,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":103804676,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":103804676,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":103737734,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":103737734,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":103726148,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":103726148,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":103571651,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":103571651,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":103642866,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":103642866,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":103283507,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":103283507,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":103208689,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":103208689,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":103134992,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":103134992,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":103128083,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":103128083,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":102969498,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":102969498,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":103083547,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":102951395,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":102951395,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":102951395,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":102951395,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":102951395,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"WeightedAverageNumberOfShareOutstandingBasicAndDiluted":{"label":"Weighted Average Number of Shares Outstanding, Basic and Diluted","description":"Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).","units":{"shares":[{"start":"2010-01-01","end":"2010-12-31","val":1678335,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":11432823,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":11432823,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":23974487,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":26586148,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2012-04-01","end":"2012-06-30","val":29197809,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":29732658,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":35958174,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":35458656,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2012-01-01","end":"2012-12-31","val":35458656,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2012-01-01","end":"2012-12-31","val":35458656,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":58125081,"accn":"0001452936-13-000034","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-03-31","val":58125081,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":58232276,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-06-30","val":58232276,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":58338103,"accn":"0001452936-13-000057","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":58338103,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":58265522,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-01-01","end":"2013-09-30","val":58265522,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-07-01","end":"2013-09-30","val":58330896,"accn":"0001452936-13-000071","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":58330896,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":58359568,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11"},{"start":"2013-01-01","end":"2013-12-31","val":58359568,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2013-01-01","end":"2013-12-31","val":58359568,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":59593935,"accn":"0001452936-14-000029","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":59593935,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":59618518,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-01-01","end":"2014-06-30","val":59618518,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-04-01","end":"2014-06-30","val":59642831,"accn":"0001452936-14-000038","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":59642831,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":59658088,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-01-01","end":"2014-09-30","val":59658088,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2014-07-01","end":"2014-09-30","val":59735474,"accn":"0001452936-14-000048","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2014-07-01","end":"2014-09-30","val":59735474,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":59714540,"accn":"0001452936-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09"},{"start":"2014-01-01","end":"2014-12-31","val":59714540,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2014-01-01","end":"2014-12-31","val":59714540,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":60036526,"accn":"0001452936-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2015-01-01","end":"2015-03-31","val":60036526,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":60115426,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-06-30","val":60115426,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2015-04-01","end":"2015-06-30","val":60193459,"accn":"0001452936-15-000026","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-04-01","end":"2015-06-30","val":60193459,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":59986122,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-01-01","end":"2015-09-30","val":59986122,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2015-07-01","end":"2015-09-30","val":59729415,"accn":"0001452936-15-000039","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-12"},{"start":"2015-07-01","end":"2015-09-30","val":59729415,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":59656667,"accn":"0001452936-16-000063","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-28"},{"start":"2015-01-01","end":"2015-12-31","val":59656667,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2015-01-01","end":"2015-12-31","val":59656667,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":58699129,"accn":"0001452936-16-000089","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-11"},{"start":"2016-01-01","end":"2016-03-31","val":58699129,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":58693629,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-01-01","end":"2016-06-30","val":58693629,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2016-04-01","end":"2016-06-30","val":58688129,"accn":"0001452936-16-000111","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"},{"start":"2016-04-01","end":"2016-06-30","val":58688129,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":58676546,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-01-01","end":"2016-09-30","val":58676546,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":58642752,"accn":"0001452936-16-000129","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-14"},{"start":"2016-07-01","end":"2016-09-30","val":58642752,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":58273335,"accn":"0001452936-17-000007","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10"},{"start":"2016-01-01","end":"2016-12-31","val":58273335,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2016-01-01","end":"2016-12-31","val":58273335,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":56782447,"accn":"0001452936-17-000026","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-03-31","val":56782447,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":56748125,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-01-01","end":"2017-06-30","val":56748125,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2017-04-01","end":"2017-06-30","val":56714180,"accn":"0001452936-17-000042","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-11"},{"start":"2017-04-01","end":"2017-06-30","val":56714180,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":56712752,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-01-01","end":"2017-09-30","val":56712752,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-07-01","end":"2017-09-30","val":56643160,"accn":"0001452936-17-000092","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14"},{"start":"2017-07-01","end":"2017-09-30","val":56643160,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":55829708,"accn":"0001452936-18-000012","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-09"},{"start":"2017-01-01","end":"2017-12-31","val":55829708,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":55829708,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":62526798,"accn":"0001452936-18-000048","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-11"},{"start":"2018-01-01","end":"2018-03-31","val":62526798,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":62216998,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-06-30","val":62216998,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":61910602,"accn":"0001452936-18-000075","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-04-01","end":"2018-06-30","val":61910602,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":59649846,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":59649846,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-07-01","end":"2018-09-30","val":54599254,"accn":"0001452936-18-000091","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-07-01","end":"2018-09-30","val":54599254,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":58738732,"accn":"0001452936-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":58738732,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2018-01-01","end":"2018-12-31","val":58738732,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":66812520,"accn":"0001452936-19-000018","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-14"},{"start":"2019-01-01","end":"2019-03-31","val":66812520,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":66685447,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":66685447,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":66559771,"accn":"0001452936-19-000026","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":66559771,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":66564532,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":66564532,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2019-07-01","end":"2019-09-30","val":66326646,"accn":"0001452936-19-000053","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-07-01","end":"2019-09-30","val":66326646,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":66443585,"accn":"0001452936-20-000039","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-26"},{"start":"2019-01-01","end":"2019-12-31","val":66443585,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":66041776,"accn":"0001452936-20-000054","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-22","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":67650215,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-04-01","end":"2020-06-30","val":69258653,"accn":"0001452936-20-000077","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":68179046,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13"},{"start":"2020-07-01","end":"2020-09-30","val":69225212,"accn":"0001452936-20-000094","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-13","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":75407976,"accn":"0001452936-21-000008","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-29","frame":"CY2020"}]}},"WeightedAverageNumberOfSharesOutstandingBasic":{"label":"Weighted Average Number of Shares Outstanding, Basic","description":"Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.","units":{"shares":[{"start":"2009-01-01","end":"2009-12-31","val":20000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":419576,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-04-01","end":"2010-06-30","val":814762,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":966540,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-07-01","end":"2010-09-30","val":2042633,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":1678335,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":6002627,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":7401527,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-06-30","val":7401527,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-04-01","end":"2011-06-30","val":8785056,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-04-01","end":"2011-06-30","val":8785056,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":9368412,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-09-30","val":9368412,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-07-01","end":"2011-09-30","val":13238044,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-07-01","end":"2011-09-30","val":13238044,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":11432823,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":23974487,"accn":"0001452936-12-000044","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-11","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":26586148,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-04-01","end":"2012-06-30","val":29197809,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":29732658,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":35958174,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3"},{"start":"2019-01-01","end":"2019-12-31","val":66443585,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":66041776,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":67650215,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2020-04-01","end":"2020-06-30","val":69258653,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":68179046,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2020-07-01","end":"2020-09-30","val":69225212,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":75407976,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":75407976,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":98036134,"accn":"0001452936-21-000021","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":98036134,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":97991934,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-01-01","end":"2021-06-30","val":97991934,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-04-01","end":"2021-06-30","val":97948219,"accn":"0001452936-21-000054","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-09"},{"start":"2021-04-01","end":"2021-06-30","val":97948219,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":97879983,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-01-01","end":"2021-09-30","val":97879983,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-07-01","end":"2021-09-30","val":97659731,"accn":"0001452936-21-000079","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"start":"2021-07-01","end":"2021-09-30","val":97659731,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":96967983,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":96967983,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":96967983,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":101419947,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":101419947,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":102929284,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":102929284,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":104422035,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-04-01","end":"2022-06-30","val":104422035,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":103351040,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":103351040,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":104180800,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":104180800,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":103522696,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":103522696,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":103522696,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":103872363,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":103872363,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":103804676,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":103804676,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":103737734,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":103737734,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":103726148,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":103726148,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":103571651,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":103571651,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":103642866,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":103642866,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":103283507,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":103283507,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":103208689,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":103208689,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":103134992,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":103134992,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":103128083,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":103128083,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":102969498,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":102969498,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":103083547,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":102951395,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":102951395,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":102951395,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":102951395,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":102951395,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"WriteOffOfDeferredDebtIssuanceCost":{"label":"Write off of Deferred Debt Issuance Cost","description":"Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08","frame":"CY2010"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-01-01","end":"2011-06-30","val":696000,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2011-01-01","end":"2011-06-30","val":696000,"accn":"0001452936-11-000012","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"start":"2011-01-01","end":"2011-09-30","val":696000,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-09-30","val":696000,"accn":"0001452936-11-000025","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-07"},{"start":"2011-01-01","end":"2011-12-31","val":696000,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2011"},{"start":"2011-01-01","end":"2011-12-31","val":696000,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2011-01-01","end":"2011-12-31","val":696000,"accn":"0001452936-12-000025","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0001452936-12-000071","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-10"},{"start":"2012-01-01","end":"2012-09-30","val":0,"accn":"0001452936-12-000103","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2012"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001452936-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-08"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0001452936-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-11","frame":"CY2013"}]}},"PaymentsForAdvanceToAffiliate":{"label":"Payments for Advance to Affiliate","description":"The cash outflow from advancing money to an affiliate (an entity that is related but not strictly controlled by the entity).","units":{"USD":[{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":7040000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":7040000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":7040000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":1201000,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06"},{"start":"2022-01-01","end":"2022-03-31","val":1201000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":1201000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":1201000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":1201000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":1201000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":1200000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":1200000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":1200000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":0,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":0,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":0,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":0,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-01-01","end":"2024-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":1502000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":2317000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":2317000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"PaymentsForRepurchaseOfEquity":{"label":"Payments for Repurchase of Equity","description":"The cash outflow to reacquire common and preferred stock.","units":{"USD":[{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":5656000,"accn":"0001452936-22-000011","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-28"},{"start":"2021-01-01","end":"2021-12-31","val":5656000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":5656000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023"}]}},"StockIssuedDuringPeriodValueIssuedForServices":{"label":"Stock Issued During Period, Value, Issued for Services","description":"Value of stock issued in lieu of cash for services contributed to the entity. Value of the stock issued includes, but is not limited to, services contributed by vendors and founders.","units":{"USD":[{"start":"2022-01-01","end":"2022-03-31","val":0,"accn":"0001452936-22-000031","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-06","frame":"CY2022Q1"}]}},"AmortizationOfFinancingCostsAndDiscounts":{"label":"Amortization of Debt Issuance Costs and Discounts","description":"Amount of amortization expense attributable to debt discount (premium) and debt issuance costs.","units":{"USD":[{"start":"2021-01-01","end":"2021-06-30","val":3023000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":4376000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":5878000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-06-30","val":3844000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":1600000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":800000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":5953000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":3900000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":2000000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":8511000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":8511000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":2426000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":2400000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":4567000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":1100000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":7100000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":7079000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":2500000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":9572000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":9572000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":2341000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":2341000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":4781000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":4781000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":7279000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":7279000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-01-01","end":"2024-12-31","val":9444000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":1895000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":3590000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":5403000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"DueFromAffiliates":{"label":"Due from Affiliates","description":"For an unclassified balance sheet, amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership.","units":{"USD":[{"end":"2021-12-31","val":7000000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2021Q4I"},{"end":"2022-06-30","val":1800000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"}]}},"ProceedsFromCollectionOfAdvanceToAffiliate":{"label":"Proceeds from Collection of Advance to Affiliate","description":"The cash inflow from the collection of money previously advanced to an entity that is related to it but not strictly controlled.","units":{"USD":[{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-06-30","val":6448000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"start":"2022-01-01","end":"2022-06-30","val":6448000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-01-01","end":"2022-09-30","val":8227000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":8227000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":8239000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":8239000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":8239000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-06-30","val":0,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"SecurityDepositLiability":{"label":"Security Deposit Liability","description":"This element represents money paid in advance to protect the provider of a product or service, such as a lessor, against damage or nonpayment by the buyer or tenant (lessee) during the term of the agreement. Such damages may include physical damage to the property, theft of property, and other contractual breaches. Security deposits held may be interest or noninterest bearing.","units":{"USD":[{"end":"2021-12-31","val":6000000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12"},{"end":"2021-12-31","val":6000000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":6000000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-06-30","val":6100000,"accn":"0001452936-22-000048","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-12","frame":"CY2022Q2I"},{"end":"2022-09-30","val":6000000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":6500000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":6500000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"end":"2022-12-31","val":6500000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":6500000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":6500000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-03-31","val":6200000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1I"},{"end":"2023-06-30","val":5500000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":5900000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":5900000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":5900000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"end":"2023-12-31","val":5900000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"end":"2023-12-31","val":5900000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":5900000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":5700000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"},{"end":"2024-06-30","val":5800000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2I"},{"end":"2024-09-30","val":6300000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":5900000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":5900000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":5900000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":4400000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":5800000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":6600000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":6100000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"GoodwillGross":{"label":"Goodwill, Gross","description":"Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.","units":{"USD":[{"end":"2020-12-31","val":16342000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020Q4I"},{"end":"2021-12-31","val":16342000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":16342000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2021-12-31","val":16342000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021Q4I"},{"end":"2022-09-30","val":16342000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":16342000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":16342000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-12-31","val":16342000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"}]}},"GoodwillImpairedAccumulatedImpairmentLoss":{"label":"Goodwill, Impaired, Accumulated Impairment Loss","description":"Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.","units":{"USD":[{"end":"2020-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020Q4I"},{"end":"2021-12-31","val":2808000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":2808000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2021-12-31","val":2808000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021Q4I"},{"end":"2022-09-30","val":10906000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":10906000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":10906000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-12-31","val":15394000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q4I"}]}},"NoncontrollingInterestIncreaseFromBusinessCombination":{"label":"Noncontrolling Interest, Increase from Business Combination","description":"Amount of increase in noncontrolling interest from a business combination.","units":{"USD":[{"start":"2022-01-01","end":"2022-09-30","val":1125000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":1125000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":1125000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":1125000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"}]}},"PaymentsForRepurchaseOfRedeemableNoncontrollingInterest":{"label":"Payments for Repurchase of Redeemable Noncontrolling Interest","description":"The cash outflow during the period for redemption of redeemable noncontrolling interests.","units":{"USD":[{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-09-30","val":6687000,"accn":"0001452936-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"start":"2022-01-01","end":"2022-09-30","val":6687000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-01-01","end":"2022-12-31","val":6687000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":6687000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":6687000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-09-30","val":0,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"AdjustmentsToAdditionalPaidInCapitalIncreaseInCarryingAmountOfRedeemablePreferredStock":{"label":"Adjustments to Additional Paid in Capital, Increase in Carrying Amount of Redeemable Preferred Stock","description":"Amount of decrease (increase) in additional paid in capital (APIC) for the increase in carrying amount of redeemable preferred stock.","units":{"USD":[{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":1800000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":1800000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":1800000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"AssetImpairmentCharges":{"label":"Asset Impairment Charges","description":"Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.","units":{"USD":[{"start":"2021-01-01","end":"2021-12-31","val":11000000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":0,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2023-01-01","end":"2023-03-31","val":17663000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2023Q1"}]}},"EffectiveIncomeTaxRateContinuingOperations":{"label":"Effective Income Tax Rate Reconciliation, Percent","description":"Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.","units":{"pure":[{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":0.17,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":0.17,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":0.17,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":0.21,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":0.21,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":0.21,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate":{"label":"Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent","description":"Percentage of domestic federal statutory tax rate applicable to pretax income (loss).","units":{"pure":[{"start":"2021-01-01","end":"2021-12-31","val":0.21,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":0.21,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":0.21,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":0.21,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":0.21,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":0.21,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":0.21,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance":{"label":"Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent","description":"Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.","units":{"pure":[{"start":"2021-01-01","end":"2021-12-31","val":-0.21,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":-0.01,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":-0.01,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":-0.01,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"ImpairmentOfInvestments":{"label":"Other than Temporary Impairment Losses, Investments","description":"The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.","units":{"USD":[{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022"}]}},"IncomeLossAttributableToParent":{"label":"Income (Loss) Attributable to Parent, before Tax","description":"Amount, before tax, of income (loss) attributable to parent. Includes, but is not limited to, income (loss) from continuing operations, discontinued operations and equity method investments.","units":{"USD":[{"start":"2020-01-01","end":"2020-12-31","val":-48813000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":-12498000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":-12498000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-4729000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-13100000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2022-04-01","end":"2022-06-30","val":-8369000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":-44101000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2022-07-01","end":"2022-09-30","val":-31000000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":-36746000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":-36746000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":-36746000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-16108000,"accn":"0001452936-23-000025","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-12"},{"start":"2023-01-01","end":"2023-03-31","val":-16108000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-73589000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-01-01","end":"2023-06-30","val":-73589000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":-57481000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"start":"2023-04-01","end":"2023-06-30","val":-57481000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":-136132000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-01-01","end":"2023-09-30","val":-136132000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-62543000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":-62543000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":-139901000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":-139901000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-76994000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10"},{"start":"2024-01-01","end":"2024-03-31","val":-76994000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":-122652000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":-122652000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":-45658000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":-45658000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":-168358000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":-168358000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":-45706000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":-45706000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":-94872000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":-18972000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":-126441000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":-107409000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":-247152000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":-120711000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"MinorityInterestChangeInRedemptionValue":{"label":"Noncontrolling Interest, Change in Redemption Value","description":"Change in noncontrolling interest during the period as a result of a change in the redemption value of redeemable noncontrolling interest.","units":{"USD":[{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":3946000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":3946000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":3946000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"NetIncomeLossAvailableToCommonStockholdersBasic":{"label":"Net Income (Loss) Available to Common Stockholders, Basic","description":"Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.","units":{"USD":[{"start":"2020-01-01","end":"2020-12-31","val":-49008000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":-10955000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":-10955000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":-45042000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":-45042000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":-45042000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":-144151000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":-144151000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":-100837000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"NetIncomeLossAvailableToCommonStockholdersDiluted":{"label":"Net Income (Loss) Available to Common Stockholders, Diluted","description":"Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders.","units":{"USD":[{"start":"2020-01-01","end":"2020-12-31","val":-49008000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":-10955000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2021-01-01","end":"2021-12-31","val":-10955000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":-45042000,"accn":"0001452936-23-000008","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"start":"2022-01-01","end":"2022-12-31","val":-45042000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":-45042000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":-144151000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":-144151000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":-100837000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet":{"label":"Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net","description":"Amount of unamortized debt discount (premium) and debt issuance costs.","units":{"USD":[{"end":"2022-12-31","val":21403000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":21403000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14"},{"end":"2022-12-31","val":21403000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2022Q4I"},{"end":"2023-06-30","val":17245000,"accn":"0001452936-23-000067","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":19353000,"accn":"0001452936-23-000089","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-14","frame":"CY2023Q3I"},{"end":"2023-12-31","val":17138000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"end":"2023-12-31","val":17138000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-12-31","val":11475000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":11475000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12"},{"end":"2024-12-31","val":11475000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"end":"2024-12-31","val":11475000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q4I"},{"end":"2025-03-31","val":9747000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1I"},{"end":"2025-06-30","val":7822000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2I"},{"end":"2025-09-30","val":9316000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"}]}},"EquitySecuritiesFvNiRealizedGain":{"label":"Equity Securities, FV-NI, Realized Gain","description":"Amount of realized gain from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).","units":{"USD":[{"start":"2021-01-01","end":"2021-12-31","val":3000000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-06-30","val":5800000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":5800000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":5900000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":100000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":5500000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":5500000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-07-01","end":"2024-09-30","val":0,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3"}]}},"EquitySecuritiesFvNiRealizedLoss":{"label":"Equity Securities, FV-NI, Realized Loss","description":"Amount of realized loss from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).","units":{"USD":[{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2024-01-01","end":"2024-03-31","val":26800000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":31600000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":4900000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":31700000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":0,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":31700000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"EquitySecuritiesFvNiUnrealizedLoss":{"label":"Equity Securities, FV-NI, Unrealized Loss","description":"Amount of unrealized loss on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).","units":{"USD":[{"start":"2021-01-01","end":"2021-12-31","val":25600000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":51900000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":51900000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":12000000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":21900000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":9900000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":25400000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":3400000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":10100000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":10100000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"}]}},"IncomeTaxesPaidNet":{"label":"Income Taxes Paid, Net","description":"The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.","units":{"USD":[{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":11500000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":11500000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":10000000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"ProceedsFromDepositsOnRealEstateSales":{"label":"Proceeds from Deposits on Real Estate Sales","description":"Cash inflow related to amounts received in advance from a potential buyer showing or confirming an intention to complete an acquisition of land, buildings, other structures, or any item classified as real estate.","units":{"USD":[{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-10-01","end":"2023-10-31","val":7500000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01","frame":"CY2023Q3I"},{"start":"2023-01-01","end":"2023-12-31","val":7528000,"accn":"0001452936-24-000035","fy":2023,"fp":"FY","form":"10-K","filed":"2024-04-01"},{"start":"2023-01-01","end":"2023-12-31","val":7528000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":9472000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"EquitySecuritiesFvNiUnrealizedGain":{"label":"Equity Securities, FV-NI, Unrealized Gain","description":"Amount of unrealized gain on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).","units":{"USD":[{"start":"2024-01-01","end":"2024-03-31","val":11400000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":15000000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":3600000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":23800000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":8700000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":19600000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"}]}},"OtherCommitment":{"label":"Other Commitment","description":"Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.","units":{"USD":[{"end":"2024-03-31","val":61100000,"accn":"0001452936-24-000066","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-10","frame":"CY2024Q1I"}]}},"InterestExpenseOperating":{"label":null,"description":null,"units":{"USD":[{"start":"2022-01-01","end":"2022-12-31","val":48130000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-06-30","val":31819000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2023-04-01","end":"2023-06-30","val":15788000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":49747000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2023-07-01","end":"2023-09-30","val":17928000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":68216000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":16773000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":34782000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-01-01","end":"2024-06-30","val":34782000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":18008000,"accn":"0001452936-24-000110","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-09"},{"start":"2024-04-01","end":"2024-06-30","val":18008000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":55366000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-01-01","end":"2024-09-30","val":55366000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":20585000,"accn":"0001452936-24-000149","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":20585000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":71892000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":16143000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":33294000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":17151000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":53109000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":19815000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"InterestExpenseNonoperating":{"label":null,"description":null,"units":{"USD":[{"start":"2022-01-01","end":"2022-12-31","val":48130000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":68216000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":16773000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":34782000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":18008000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":55366000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":20585000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":71892000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":16143000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":33294000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":17151000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":53109000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":19815000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"NonoperatingIncomeExpense":{"label":"Nonoperating Income (Expense)","description":"The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).","units":{"USD":[{"start":"2022-01-01","end":"2022-12-31","val":7888000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":25650000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-22520000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":-32005000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":-9485000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":-33943000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":-1939000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":67277000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":-6491000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":-11044000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":-4493000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":-27389000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":-16345000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"SegmentReportingOtherItemAmount":{"label":null,"description":null,"units":{"USD":[{"start":"2022-01-01","end":"2022-12-31","val":73861000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":161808000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":53455000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":25617000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":11424000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":46664000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":21047000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2024-01-01","end":"2024-12-31","val":147531000,"accn":"0001452936-25-000013","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":9205000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":55812000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":46607000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":74024000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":18213000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"OtherNonoperatingIncome":{"label":"Other Nonoperating Income","description":"Amount of income related to nonoperating activities, classified as other.","units":{"USD":[{"start":"2024-01-01","end":"2024-03-31","val":455000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":738000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-04-01","end":"2024-06-30","val":283000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2024Q2"},{"start":"2024-01-01","end":"2024-09-30","val":1117000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2024-07-01","end":"2024-09-30","val":379000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2024Q3"},{"start":"2025-01-01","end":"2025-03-31","val":842000,"accn":"0001452936-25-000053","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-12","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":1016000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-04-01","end":"2025-06-30","val":234000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13","frame":"CY2025Q2"},{"start":"2025-01-01","end":"2025-09-30","val":1268000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-07-01","end":"2025-09-30","val":252000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3"}]}},"ProceedsFromContributionsFromAffiliates":{"label":"Proceeds from Contributions from Affiliates","description":"The cash inflow from an entity that is affiliated with the entity by means of direct or indirect ownership.","units":{"USD":[{"start":"2024-01-01","end":"2024-06-30","val":0,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2024-01-01","end":"2024-09-30","val":0,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-01-01","end":"2025-06-30","val":10000000,"accn":"0001452936-25-000083","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-13"},{"start":"2025-01-01","end":"2025-09-30","val":10000000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}},"PaymentsOfDebtExtinguishmentCosts":{"label":"Payment for Debt Extinguishment or Debt Prepayment Cost","description":"Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.","units":{"USD":[{"start":"2024-01-01","end":"2024-09-30","val":0,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"start":"2025-01-01","end":"2025-09-30","val":1473000,"accn":"0001452936-25-000113","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"}]}}}}}