{"cik":351817,"entityName":"SilverBow Resources, 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":"2010-07-31","val":37878628,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-10-31","val":37878628,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-10-31","val":37885357,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2011-01-31","val":42049082,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2010Q4I"},{"end":"2011-04-30","val":42423144,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-07-31","val":42468169,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-10-31","val":42478426,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2012-01-31","val":42540699,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011Q4I"},{"end":"2012-04-30","val":42844639,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-07-31","val":42885215,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-10-31","val":42923371,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2013-01-31","val":43002344,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012Q4I"},{"end":"2013-04-30","val":43358059,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-07-31","val":43382961,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-10-31","val":43395684,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2014-01-31","val":43475471,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2014-01-31","val":43475471,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013Q4I"},{"end":"2014-04-30","val":43807946,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-04-30","val":43807946,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-07-31","val":43846281,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-07-31","val":43846281,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-10-31","val":43859472,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2015-01-31","val":44006995,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014Q4I"},{"end":"2015-04-30","val":44488507,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-07-31","val":44544789,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-10-30","val":44550975,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2016-02-29","val":44747966,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2016-04-22","val":45112751,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2016-04-29","val":10000001,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10"},{"end":"2016-06-30","val":10000001,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09","frame":"CY2016Q2I"},{"end":"2016-09-30","val":10034354,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03","frame":"CY2016Q3I"},{"end":"2017-02-27","val":11465688,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2017-05-01","val":11478709,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08","frame":"CY2017Q1I"},{"end":"2017-08-08","val":11526532,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09","frame":"CY2017Q2I"},{"end":"2017-11-01","val":11551468,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07","frame":"CY2017Q3I"},{"end":"2018-02-26","val":11616482,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01"},{"end":"2018-05-01","val":11652637,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-08-01","val":11667165,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-11-01","val":11692101,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2019-01-31","val":11693052,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2018Q4I"},{"end":"2019-05-01","val":11743159,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-08-01","val":11758317,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-11-01","val":11783846,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2020-01-31","val":11807084,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2019Q4I"},{"end":"2020-05-01","val":11886543,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-07-31","val":11934420,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-10-28","val":11936679,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2021-01-31","val":11936679,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020Q4I"},{"end":"2021-04-30","val":12196498,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-07-30","val":12197736,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-10-29","val":14726605,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2022-01-31","val":16631175,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021Q4I"},{"end":"2022-04-29","val":16850478,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-07-29","val":22306506,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-10-28","val":22309740,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2023-02-24","val":22473737,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2023-04-28","val":22616736,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-07-28","val":22617842,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-10-27","val":25429610,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2024-02-23","val":25429610,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2024-04-26","val":25538487,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"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":"2009-06-30","val":503004459,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2I"},{"end":"2010-06-30","val":1019313879,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-06-30","val":1019313879,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2010-06-30","val":1019313879,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-06-30","val":1019267191,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q2I"},{"end":"2011-06-30","val":1549132358,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2011-06-30","val":1549132358,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2011-06-30","val":1549132358,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011Q2I"},{"end":"2012-06-30","val":778385135,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012Q2I"},{"end":"2013-06-30","val":504125149,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-06-30","val":504125149,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013Q2I"},{"end":"2014-06-30","val":551832992,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014Q2I"},{"end":"2015-12-31","val":87818801,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2016-12-31","val":124874291,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28","frame":"CY2016Q4I"},{"end":"2017-06-30","val":86619851,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2017Q2I"},{"end":"2018-06-30","val":108103125,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2018Q2I"},{"end":"2019-06-28","val":52690067,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2019Q2I"},{"end":"2020-06-30","val":14623839,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020Q2I"},{"end":"2021-06-30","val":108089448,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021Q2I"},{"end":"2022-06-30","val":492145402,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2022Q2I"},{"end":"2023-06-30","val":518174326,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q2I"}]}}},"us-gaap":{"AccountsPayableAndAccruedLiabilitiesCurrent":{"label":"Accounts Payable and Accrued Liabilities, Current","description":"Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.","units":{"USD":[{"end":"2009-12-31","val":60823000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":60823000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":60823000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":60823000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":62748000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":71144000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":71144000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":81646000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":75594000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":75594000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":75594000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":75594000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":70849000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":52212000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":90751000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":95966000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":95966000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":95966000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":95966000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":95966000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":78798000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":89403000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":99606000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":75378000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":75378000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":75378000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":75378000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":75378000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":77310000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":69656000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":88419000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":81608000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":83361000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":83361000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":83361000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":82318000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":82318000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":82318000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":82318000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":82318000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":81182000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":79542000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":104523000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":104523000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":100493000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":68244000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":68244000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":68244000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":68244000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":68244000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":73549000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":45586000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":49116000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":7663000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":7663000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":60626000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":44437000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":44437000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":44437000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":44437000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":32289000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":35350000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":48108000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":48921000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":48921000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":48921000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":48921000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":48921000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":31978000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":33320000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":38951000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":39343000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":39343000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-12-31","val":26991000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":26991000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-12-31","val":35034000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":35034000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-12-31","val":60200000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":60200000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-12-31","val":98816000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"}]}},"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":"2011-09-30","val":27700000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"}]}},"AccountsPayableAndOtherAccruedLiabilitiesCurrent":{"label":"Accounts Payable and Other Accrued Liabilities, Current","description":"Amount of liabilities incurred to vendors for goods and services received, and accrued liabilities classified as other, payable within one year or the normal operating cycle, if longer.","units":{"USD":[{"end":"2010-12-31","val":8100000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":8100000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":8100000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-06-30","val":11100000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":21000000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":18700000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":18700000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":18700000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":18700000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":18700000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":22100000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":23700000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":28300000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":13300000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":13300000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":13300000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":13300000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":13300000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":13300000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":11300000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":27900000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":11400000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":26100000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":26100000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":26100000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":26100000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":26100000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":26100000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":26100000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":26100000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":10900000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":10900000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":7500000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":7500000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":9600000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":13700000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":13700000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":13700000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":13700000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":13700000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":35700000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":1600000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":2200000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"}]}},"AccountsPayableCurrent":{"label":"Accounts Payable, Current","description":"Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).","units":{"USD":[{"end":"2019-12-31","val":39343000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":39343000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":39343000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q4I"},{"end":"2020-03-31","val":36159000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":15800000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":22707000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":26991000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":26991000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":26991000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":26991000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":20601000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":23887000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":38000000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":35034000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":35034000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":35034000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":35034000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":35034000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":41909000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":78778000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":80107000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":60200000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":60200000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":60200000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":60200000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":60200000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":51599000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":60143000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":74731000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":98816000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":98816000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":143684000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"AccountsPayableOtherCurrent":{"label":"Accounts Payable, Other, Current","description":"Amount of obligations incurred classified as other, payable within one year or the normal operating cycle, if longer.","units":{"USD":[{"end":"2010-12-31","val":1470000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":1887000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-09-30","val":1472000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":6825000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":6825000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":6825000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":6825000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":6825000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":2333000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":2237000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":1803000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":4799000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":4799000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":4799000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":4799000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":4799000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":4799000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":3276000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":2894000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":2745000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":2891000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":2891000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":2891000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":2891000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":2891000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":2891000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":2891000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":2891000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":6286000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":6286000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":6890000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":6890000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":3603000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":4541000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":3926000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":3926000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":3926000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":4541000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":5082000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":4859000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":3542000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":498000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":498000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":17320000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":5938000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":5938000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":5938000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":5938000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":4422000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":5514000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":3893000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":3485000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":3485000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":3485000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":3485000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":3485000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":2774000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":3387000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":3135000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":2834000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":2834000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":2834000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":2834000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":2834000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":821000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":1321000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":3680000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":2389000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":2389000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":2389000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":1560000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":2389000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":3546000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":6524000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":1651000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":8315000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":1944000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":1944000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":1944000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":8315000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":2295000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":2036000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":5151000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":13033000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":7007000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":7007000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":7007000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":13033000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":5353000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":2281000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":9342000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":13343000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":12376000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":15546000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"AccountsPayableTradeCurrent":{"label":"Accounts Payable, Trade, Current","description":"Carrying value as of the balance sheet date of obligations incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).","units":{"USD":[{"end":"2010-12-31","val":22459000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":22459000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":22459000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-06-30","val":16038000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":39923000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":42080000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":42080000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":42080000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":42080000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":42080000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":39219000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":45183000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":60785000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":31128000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":31128000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":31128000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":31128000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":31128000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":31128000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":23073000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":41145000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":34497000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":30769000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":30769000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":30769000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":30769000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":30769000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":30769000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":30769000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":30769000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":24760000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":24760000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":39240000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":39240000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":25624000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":31153000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":31153000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":31153000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":31153000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":31153000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":43912000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":12361000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":17600000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":24731000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":20884000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":20884000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":20884000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":20884000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":15440000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":16015000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":26040000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":32683000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":32683000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":32683000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":32683000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":32683000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":20728000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":18560000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":22950000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":26121000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":26121000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":26121000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":26121000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":26121000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":27409000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":5466000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":8063000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":15930000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":15930000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":15930000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":15930000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":15930000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":8706000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":8736000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":8423000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":9688000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":9688000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":9688000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":9688000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":9688000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":9862000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":9948000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":21154000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":23660000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":23660000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":23660000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":23660000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":23660000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":20254000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":32210000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":30708000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":32225000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":32225000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":52924000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"AccountsReceivableGrossCurrent":{"label":"Accounts Receivable, before Allowance for Credit Loss, Current","description":"Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.","units":{"USD":[{"end":"2012-12-31","val":53900000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":53900000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":57200000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-09-30","val":52100000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":56900000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":56900000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":56900000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":56900000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":56900000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":56900000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":56900000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":56900000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":59500000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":60000000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":59000000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":59700000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":51900000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":34800000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":34800000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":34800000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":34800000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":34800000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":24700000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":27200000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":22600000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":14900000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":14900000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10"},{"end":"2015-12-31","val":14900000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2015-12-31","val":14900000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2015-12-31","val":14900000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28","frame":"CY2015Q4I"},{"end":"2016-03-31","val":11600000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2016-06-30","val":13400000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09","frame":"CY2016Q2I"},{"end":"2016-09-30","val":15700000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03","frame":"CY2016Q3I"},{"end":"2016-12-31","val":12600000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-12-31","val":12600000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-12-31","val":12600000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-12-31","val":12600000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-12-31","val":12600000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q4I"},{"end":"2017-03-31","val":12800000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08","frame":"CY2017Q1I"},{"end":"2017-06-30","val":15900000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09","frame":"CY2017Q2I"},{"end":"2017-09-30","val":16900000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07","frame":"CY2017Q3I"},{"end":"2017-12-31","val":20100000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01"},{"end":"2017-12-31","val":20100000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":20100000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":20100000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":20100000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":17000000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":17400000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":24200000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":36900000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":36900000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":36900000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":36900000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":36900000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":21400000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":25500000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":24800000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":24600000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":24600000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":24600000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":24600000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":24600000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":14100000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":11200000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":17800000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":18800000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":18800000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":18800000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":18800000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":18800000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":22800000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":23900000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":41800000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":45300000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":45300000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":45300000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":45300000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":45300000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2021-12-31","val":45300000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2021-12-31","val":45300000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021Q4I"},{"end":"2022-03-31","val":43000000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":80300000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":91600000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":70900000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":70900000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":70900000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":70900000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":70900000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2022-12-31","val":70900000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2022Q4I"},{"end":"2023-03-31","val":44300000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":45200000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":60400000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":91900000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":91900000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":92200000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"AccountsReceivableNetCurrent":{"label":"Accounts Receivable, after Allowance for Credit Loss, Current","description":"Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.","units":{"USD":[{"end":"2009-12-31","val":54273000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":54273000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":54273000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":54273000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":40022000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":38109000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":38109000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":46975000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":46975000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":46975000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":46975000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":46975000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":65443000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":50146000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":45100000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":64392000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":64392000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":64392000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":64392000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":68360000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":61199000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":51878000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":49994000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":67318000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":67318000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":67318000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":67318000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":67318000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":71203000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":73209000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":64517000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":68814000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":70897000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":70897000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":70897000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":70897000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":70897000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":70897000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":70897000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":70897000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":73082000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":73581000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":68615000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":69387000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":63385000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":48451000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":48451000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":48451000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":48451000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":48451000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":49640000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":39410000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":36610000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":21704000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":21704000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":18537000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":27263000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":27263000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":27263000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":27263000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":21133000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":22057000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":31066000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":46472000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":46472000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":46472000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":46472000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":46472000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":31342000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":34760000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":34633000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":36996000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":36996000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":36996000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":36996000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":36996000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":30345000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":23572000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":28884000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":25850000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":25850000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":25850000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":25850000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":25850000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":26075000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":25957000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":44190000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":49777000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":49777000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":49777000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":49777000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":49777000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":46095000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":110093000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":102691000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":89714000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":89714000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":89714000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":89714000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":89714000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":63940000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":64587000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":80202000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":138343000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":138343000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":125459000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"AccruedLiabilitiesCurrent":{"label":"Accrued Liabilities, Current","description":"Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).","units":{"USD":[{"end":"2010-12-31","val":19284000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":21801000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":11044000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-06-30","val":16581000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":24559000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":15833000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":15833000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":15833000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":15833000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":15833000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":15540000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":15606000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":11328000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":14647000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":14647000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":14647000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":14647000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":14647000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":16479000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":20401000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":17970000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":13173000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":17059000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":17059000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":17059000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":16016000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":16016000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":16016000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":16016000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":16016000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":18126000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":16486000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":15988000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":15988000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":14451000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":10784000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":10784000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":10784000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":10784000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":10784000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":7699000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":8352000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":8134000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":3775000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":3490000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":3490000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":3490000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":3490000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":2964000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":2316000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":3062000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":3549000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":3549000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":3549000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":3549000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":3549000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":3258000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":3410000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":3664000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":3873000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":17889000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":17889000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":17889000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":3873000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":12104000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":5436000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":4915000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":2491000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":7324000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":7324000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":7324000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":7324000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":6611000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":12114000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":20482000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":7354000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":7354000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":7354000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":7354000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":7354000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":11128000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":24166000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":54210000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":56465000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":56465000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":56465000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":56465000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":56465000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":45264000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":44047000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":56424000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":31900000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":31900000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":42114000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"AccruedProfessionalFeesCurrent":{"label":"Accrued Professional Fees, Current","description":"Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).","units":{"USD":[{"end":"2016-03-31","val":7100000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":2784000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":2784000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":2784000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":2784000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":2982000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":3120000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":2547000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":534000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":534000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":534000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":534000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":534000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":335000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":239000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":314000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":109000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":109000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":109000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":109000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":109000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":247000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":158000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":162000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":150000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":150000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":150000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":150000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":150000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":153000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":143000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":132000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":1972000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":1972000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":1972000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":1972000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":1972000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":2275000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":5276000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":560000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":1988000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":388000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":388000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":388000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":388000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":306000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":260000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":181000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":208000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":208000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":119000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment":{"label":"Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment","description":"Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.","units":{"USD":[{"end":"2009-12-31","val":2214146000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":2214146000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":2214146000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":2214146000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":2292193000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":2333367000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":2333367000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":2378262000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":2378262000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":2378262000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":2378262000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":2378262000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":2431612000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":2487813000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":2540613000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":2599079000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":2599079000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":2599079000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":2599079000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":2599079000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":2660839000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":2722546000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":2781965000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":2847773000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":2847773000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":2847773000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":2847773000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":2847773000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":2824839000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":2908302000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":2968161000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":3034614000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":3174453000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":3174453000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":3174453000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":3125282000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":3125282000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":3125282000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":3125282000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":3125282000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":3236443000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":3188238000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":3308992000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":3261672000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":3326908000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":3839118000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":3839118000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":3839118000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":3839118000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":3839118000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":4402460000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":4704508000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":5061058000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":5577854000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":5577854000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":5673015000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":216769000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":216769000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":216769000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":216769000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":229901000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":242997000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":261763000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":284804000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":284804000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":284804000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":284804000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":284804000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":306609000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":330638000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":355574000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":380728000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":380728000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":380728000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":380728000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":380728000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":499759000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":773836000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":787830000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":801279000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":801279000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":801279000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":801279000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":801279000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":814691000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":830749000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":846822000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":869985000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":869985000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":869985000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":869985000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":869985000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":891158000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":917619000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":959139000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":1004044000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":1004044000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":1004044000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":1004044000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":1004044000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":1048062000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":1097935000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":1151141000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":1223241000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":1223241000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":1315364000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax":{"label":"Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax","description":"Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.","units":{"USD":[{"end":"2011-06-30","val":200000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":0,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011Q4I"},{"end":"2012-03-31","val":300000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"}]}},"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":"2009-12-31","val":-223000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2009-12-31","val":-223000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":-223000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":-223000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2010-06-30","val":56000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":0,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-09-30","val":0,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-12-31","val":-138000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2010-12-31","val":-138000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":-138000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":-138000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":-138000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2011-03-31","val":-232000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":210000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":0,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2011-12-31","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2012-03-31","val":261000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":-113000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012Q4I"}]}},"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":"2009-12-31","val":551606000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":551606000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":551606000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":551606000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":559303000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":562429000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":562429000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":706857000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":706857000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":706857000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":706857000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":706857000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":713072000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":717945000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":722502000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":726956000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":726956000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":726956000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":726956000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":726956000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":733592000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":738918000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":743677000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":747868000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":747868000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":747868000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":747868000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":747868000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":748517000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":750697000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":755303000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":758971000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":761972000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":761972000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":761972000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":762242000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":762242000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":762242000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":762242000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":762242000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":764058000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":764058000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":766875000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":766875000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":769663000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":771972000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":771972000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":771972000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":771972000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":771972000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":771624000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":773322000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":774830000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":776358000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":776358000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":777269000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":279111000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":279111000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":279111000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":279111000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":281303000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":282726000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":284406000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":286281000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":286281000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":286281000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":286281000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":286281000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":288130000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":289899000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":291754000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":292916000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":292916000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":292916000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":292916000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":292916000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":294250000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":295479000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":296629000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":297712000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":297712000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":297712000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":297712000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":297712000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":298841000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":300088000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":324106000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":413017000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":413017000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":413017000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":413017000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":413017000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":414127000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":573259000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":574885000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":576118000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":576118000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":576118000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":576118000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":576118000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":577293000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":578817000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":677473000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":679202000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":679202000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":681099000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"AdjustmentsToAdditionalPaidInCapitalIncomeTaxDeficiencyFromShareBasedCompensation":{"label":"Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation","description":"Amount of decrease in additional paid in capital (APIC) resulting from a tax deficiency associated with a share-based compensation plan other than an employee stock ownership plan (ESOP).","units":{"USD":[{"start":"2013-01-01","end":"2013-12-31","val":1600000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":1600000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":1600000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":-1607000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":1700000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":1700000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":1700000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":1900000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":1900000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":1900000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":200000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":200000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":200000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":2100000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":2100000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":200000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":200000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2015-01-01","end":"2015-03-31","val":1200000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":1200000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":1400000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":200000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":1400000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":0,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-04-22","val":0,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"}]}},"AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue":{"label":"APIC, Share-based Payment Arrangement, Increase for Cost Recognition","description":"Amount of increase to additional paid-in capital (APIC) for recognition of cost for award under share-based payment arrangement.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":16167000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":11320000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-12-31","val":11320000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-12-31","val":11320000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":11320000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":11320000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":5684000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-09-30","val":8756000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":8756000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-12-31","val":11849000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":11849000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2010-01-01","end":"2010-12-31","val":11849000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-12-31","val":11849000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":11849000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":11849000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":3687000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":7983000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":12429000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":16830000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":16830000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2011-01-01","end":"2011-12-31","val":16830000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-12-31","val":16830000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":16830000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":18676000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2011-01-01","end":"2011-12-31","val":16830000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":17160000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":4956000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":10035000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":14646000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":18676000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":18676000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-12-31","val":18676000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":18676000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":18995000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":18995000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":4645000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":9232000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":12900000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":15936000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":15936000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-12-31","val":15936000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-12-31","val":15557000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":15557000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":15557000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":15557000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":15557000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":15557000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":3141000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":2871000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":5959000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":5689000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":8477000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-12-31","val":10787000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":10787000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2014-01-01","end":"2014-12-31","val":10787000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-12-31","val":10787000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":10787000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":1066000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":2765000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":4273000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":5802000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"start":"2015-01-01","end":"2015-12-31","val":5802000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":913000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-12-31","val":7029000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2017-01-01","end":"2017-12-31","val":7029000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-12-31","val":7029000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":7029000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":1485000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":1485000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":1485000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-03-31","val":1485000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":2908000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":1423000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":1423000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":4588000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":1680000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":6463000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":6463000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":1849000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":1849000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-03-31","val":1849000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-03-31","val":1849000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2019-01-01","end":"2019-03-31","val":1849000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-03-31","val":1849000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q1"},{"start":"2019-04-01","end":"2019-06-30","val":1769000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":1769000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-04-01","end":"2019-06-30","val":1769000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":1769000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q2"},{"start":"2019-07-01","end":"2019-09-30","val":1855000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":1855000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":6636000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":6636000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":1335000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":1335000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-03-31","val":1335000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-03-31","val":1335000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2020-01-01","end":"2020-03-31","val":1335000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-03-31","val":1335000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q1"},{"start":"2020-04-01","end":"2020-06-30","val":1229000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":1229000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-04-01","end":"2020-06-30","val":1229000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":1229000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q2"},{"start":"2020-07-01","end":"2020-09-30","val":1150000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":1150000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":4797000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":4797000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":1131000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":1131000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-03-31","val":1131000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-03-31","val":1131000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2021-01-01","end":"2021-03-31","val":1131000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-03-31","val":1131000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q1"},{"start":"2021-04-01","end":"2021-06-30","val":1248000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":1248000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-04-01","end":"2021-06-30","val":1248000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":1248000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q2"},{"start":"2021-07-01","end":"2021-09-30","val":1251000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":1251000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":4874000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":4874000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":4874000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":1101000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":1101000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-03-31","val":1101000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-03-31","val":1101000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2022-01-01","end":"2022-03-31","val":1101000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-03-31","val":1101000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q1"},{"start":"2022-04-01","end":"2022-06-30","val":1756000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":1756000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-04-01","end":"2022-06-30","val":1756000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":1756000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q2"},{"start":"2022-07-01","end":"2022-09-30","val":1239000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":1239000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":5329000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":5329000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":1179000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":1179000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-03-31","val":1179000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-03-31","val":1179000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-04-01","end":"2023-06-30","val":1524000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":1524000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q2"},{"start":"2023-07-01","end":"2023-09-30","val":1551000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":5807000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":1898000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation":{"label":"Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation","description":"Amount of increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":1422000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":-4041000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-12-31","val":-4041000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-12-31","val":-4041000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":-4041000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-4041000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":28000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":28000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2010-01-01","end":"2010-12-31","val":28000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-12-31","val":28000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":28000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":28000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":329000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":329000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":333000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":333000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2011-01-01","end":"2011-12-31","val":333000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-12-31","val":333000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":333000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":175000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2011-01-01","end":"2011-12-31","val":333000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":333000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-06-30","val":126000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":126000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":175000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":175000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-12-31","val":175000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":175000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":175000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":175000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":-1587000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-1568000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":-1568000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":-1607000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":-1607000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-12-31","val":-1607000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-12-31","val":-1607000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-1607000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-1607000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-1607000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-1607000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013"}]}},"AllowanceForDoubtfulAccountsReceivableCurrent":{"label":"Accounts Receivable, Allowance for Credit Loss, Current","description":"Amount of allowance for credit loss on accounts receivable, classified as current.","units":{"USD":[{"end":"2010-12-31","val":100000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":100000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":100000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-06-30","val":100000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":100000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":100000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":100000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":100000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":100000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":100000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":100000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":100000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":100000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":100000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":100000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":100000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":100000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":100000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":100000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":100000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":100000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":100000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":100000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":100000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":100000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":100000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":100000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":100000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":100000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":100000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":100000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":100000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":100000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":100000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":400000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":100000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":100000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":100000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":100000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":100000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":100000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":100000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":100000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":100000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":100000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10"},{"end":"2015-12-31","val":100000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2015-12-31","val":100000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2015-12-31","val":100000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28","frame":"CY2015Q4I"},{"end":"2016-03-31","val":100000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2016-06-30","val":300000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09","frame":"CY2016Q2I"},{"end":"2016-09-30","val":100000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03","frame":"CY2016Q3I"},{"end":"2016-12-31","val":100000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-12-31","val":100000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-12-31","val":100000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-12-31","val":100000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-12-31","val":100000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q4I"},{"end":"2017-03-31","val":100000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08","frame":"CY2017Q1I"},{"end":"2017-06-30","val":100000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09","frame":"CY2017Q2I"},{"end":"2017-09-30","val":100000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07","frame":"CY2017Q3I"},{"end":"2017-12-31","val":100000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01"},{"end":"2017-12-31","val":100000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":100000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":100000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":100000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":100000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":100000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":100000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":100000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":100000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":100000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":100000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":100000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":100000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":100000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":100000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":100000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":100000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":100000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":100000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":100000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":100000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":100000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":100000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":100000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":100000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":100000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":100000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":100000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":100000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":100000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":100000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":100000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":100000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":100000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":100000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":100000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2021-12-31","val":100000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":100000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":100000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":100000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":100000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":100000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":100000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":100000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":100000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2022-12-31","val":100000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2022Q4I"},{"end":"2023-03-31","val":100000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":100000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":100000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":100000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":100000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":100000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"AmountAvailableForDividendDistributionWithoutPriorApprovalFromRegulatoryAgency":{"label":"Amount Available for Dividend Distribution without Prior Approval from Regulatory Agency (Deprecated 2013-01-31)","description":"The amount of dividends that may be paid or declared in any calendar year without prior approval of regulatory agencies.","units":{"USD":[{"end":"2012-06-30","val":15000000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":15000000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2013-03-31","val":15000000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":15000000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":15000000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"}]}},"AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits":{"label":"Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units","description":"Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise of stock options or restrictive stock units (RSUs).","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":-874000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":-1589000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011"}]}},"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":"2009-01-01","end":"2009-12-31","val":1300000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":1200000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":1200000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":800000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":700000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":600000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":600000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":600000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":800000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":800000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":600000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":600000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":700000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":700000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":800000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":800000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":800000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":800000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":800000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":800000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":900000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":1000000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":1300000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":1100000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":1400000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":1300000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":1300000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":1300000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"}]}},"AssetRetirementObligation":{"label":"Asset Retirement Obligation","description":"The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.","units":{"USD":[{"end":"2008-12-31","val":48785000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2008Q4I"},{"end":"2009-12-31","val":64236000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2009-12-31","val":64236000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2009-12-31","val":64236000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2009-12-31","val":64236000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2009Q4I"},{"end":"2010-06-30","val":66614000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2I"},{"end":"2010-09-30","val":67718000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3I"},{"end":"2010-12-31","val":78879000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":78879000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":78879000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2010-12-31","val":78879000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2010-12-31","val":78879000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010Q4I"},{"end":"2011-03-31","val":78737000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1I"},{"end":"2011-06-30","val":79560000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":103511000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":76393000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":76393000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":76393000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":76393000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":76393000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2011-12-31","val":76393000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2011-12-31","val":76393000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011Q4I"},{"end":"2012-03-31","val":78855000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":80628000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":83292000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":86777000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":86777000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":86777000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":86777000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":86777000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":86777000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2012-12-31","val":86777000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012Q4I"},{"end":"2013-03-31","val":88302000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":78352000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":76747000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":79084000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":79084000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":79084000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":79084000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":79084000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":79084000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":79084000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":79084000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2013-12-31","val":79084000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013Q4I"},{"end":"2014-03-31","val":79089000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":79089000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":79680000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":79680000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":80447000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":72831000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":72831000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":72831000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":72831000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":72831000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":70510000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":72173000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":72572000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":63555000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":63555000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":65333000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2016-12-31","val":32256000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2016-12-31","val":32256000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2016-12-31","val":32256000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2016-12-31","val":32256000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2016Q4I"},{"end":"2017-12-31","val":10787000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":10787000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":10787000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":10787000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2017-12-31","val":10787000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2017-12-31","val":10787000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2017-12-31","val":10787000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2017-12-31","val":10787000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2017-12-31","val":4259000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2017Q4I"},{"end":"2018-03-31","val":4652000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":4561000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":4628000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":4259000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":4259000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":4259000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":4259000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":4259000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2018-12-31","val":4259000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2018-12-31","val":4259000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2018-12-31","val":4259000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2018Q4I"},{"end":"2019-03-31","val":4357000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":4489000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":4573000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":4447000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":4447000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":4447000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":4447000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":4447000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2019-12-31","val":4447000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2019-12-31","val":4447000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2019-12-31","val":4447000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2019-12-31","val":4447000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2019Q4I"},{"end":"2020-03-31","val":4558000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":4694000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":4783000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":4974000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":4974000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":4974000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":4974000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":4974000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2020-12-31","val":4974000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2020-12-31","val":4974000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2020-12-31","val":4974000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2020-12-31","val":4974000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2020Q4I"},{"end":"2021-03-31","val":4945000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":5101000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":5198000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":6050000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":6050000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":6050000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":6050000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":6050000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2021-12-31","val":6050000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2021-12-31","val":6050000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2021-12-31","val":6050000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2021-12-31","val":6050000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021Q4I"},{"end":"2022-03-31","val":6169000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":8904000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":8784000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":10456000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":10456000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":10456000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":10456000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":10456000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2022-12-31","val":10456000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2022Q4I"},{"end":"2023-03-31","val":11049000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":11170000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":11418000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":13160000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":13160000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":13510000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"AssetRetirementObligationAccretionExpense":{"label":"Asset Retirement Obligation, Accretion Expense","description":"Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":1958000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":1419000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":717000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":2151000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":2151000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":732000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":732000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":2906000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":2906000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":954000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":1929000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":1929000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":975000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":975000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":2927000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":2927000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":2927000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":998000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":998000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":998000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":3956000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":3956000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":3956000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":1136000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":1136000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":2299000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":2299000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":1163000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":1163000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":3482000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":3482000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":1183000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":1183000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":4570000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":4570000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":4570000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":4570000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":1112000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":1112000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":2274000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":2274000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":1162000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":1162000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":3465000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":3465000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":1191000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":1191000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":5121000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":5121000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":5121000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":5121000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":1775000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":1775000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":1775000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":3254000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":3254000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":3254000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":1479000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":1479000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":1479000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":4732000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":4732000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":1478000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":1478000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":6181000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":6181000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":6181000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":6181000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":1386000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":1386000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":1386000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":2801000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":2801000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":2801000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":1415000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":1415000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":1415000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":4246000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":4246000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":1445000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":1445000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":5712000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":5712000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":1365000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":1365000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":2746000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":1381000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":4156000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":1410000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":5572000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":1291000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":564000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":1140000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":576000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":1722000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":582000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":2322000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2017-01-01","end":"2017-12-31","val":2322000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-12-31","val":2322000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":2322000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":159000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":159000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":243000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":243000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":84000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":84000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":330000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":330000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":87000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":87000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":419000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":419000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2018-01-01","end":"2018-12-31","val":419000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-12-31","val":419000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":419000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":83000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":83000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":168000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":168000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":86000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":86000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":257000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":257000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":88000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":88000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":329000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":329000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2019-01-01","end":"2019-12-31","val":329000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-12-31","val":329000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":86000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":329000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-03-31","val":86000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":173000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":173000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":88000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":88000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":263000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":263000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":90000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":90000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":354000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":354000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2020-01-01","end":"2020-12-31","val":354000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-12-31","val":354000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":354000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":75000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":75000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":148000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":148000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":74000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":74000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":226000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":226000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":77000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":77000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":306000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":306000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2021-01-01","end":"2021-12-31","val":306000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":306000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":306000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":99000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":306000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-03-31","val":99000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":200000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":200000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":101000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":101000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":366000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":366000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":166000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":166000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":534000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":534000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2022-01-01","end":"2022-12-31","val":534000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-12-31","val":534000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":534000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":224000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":224000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":464000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":240000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":718000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":254000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":985000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"start":"2023-01-01","end":"2023-12-31","val":985000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":316000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"AssetRetirementObligationCashPaidToSettle":{"label":"Asset Retirement Obligation, Cash Paid to Settle","description":"Amount of cash paid during the period to settle an asset retirement obligation. Amounts paid to settle an asset retirement obligation are generally included in the operating section of the Statement of Cash Flows.","units":{"USD":[{"start":"2017-01-01","end":"2017-03-31","val":411000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":1894000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":2245000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":2335000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":120000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":120000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":144000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":144000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":159000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":159000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":187000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":187000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":31000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":31000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":47000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":47000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":67000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":67000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":83000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":83000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":2000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":2000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":15000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":15000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":27000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":27000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":94000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":94000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":104000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":104000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":166000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":166000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":151000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":151000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":158000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":158000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":158000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":38000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":38000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":54000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":54000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":47000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":47000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":48000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":48000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":3000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":3000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":411000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":481000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":716000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":2000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"AssetRetirementObligationCurrent":{"label":"Asset Retirement Obligation, Current","description":"Current portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.","units":{"USD":[{"end":"2010-12-31","val":8708000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":8708000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":8708000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-06-30","val":7986000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":12274000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":9279000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":9279000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":9279000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":9279000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":9279000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":9303000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":9656000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":6088000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":7134000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":7134000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":7134000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":7134000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":7134000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":7134000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":8779000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":9520000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":8119000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":15859000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":15859000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":15859000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":15859000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":15859000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":15859000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":15859000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":15859000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":14586000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":14586000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":13717000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":13717000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":13292000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":10709000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":10709000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":10709000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":10709000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":10709000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":6879000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":7197000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":7124000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":7165000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":7165000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":7719000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":2109000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":2109000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":2109000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":2109000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":467000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":303000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":469000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":302000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":302000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":302000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":302000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":302000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":284000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":270000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":307000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":392000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":392000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":392000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":392000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":392000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":387000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":382000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":439000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":441000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":441000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":441000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":441000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":441000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":456000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":515000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":492000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":524000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":524000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":524000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":524000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":524000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":526000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":528000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":529000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":1284000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":1284000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":1284000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":1284000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":1284000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":1598000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":1551000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":1578000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":1576000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":1576000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":1597000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"AssetRetirementObligationLiabilitiesIncurred":{"label":"Asset Retirement Obligation, Liabilities Incurred","description":"Amount of asset retirement obligations incurred during the period.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":3400000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":524000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":1018000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":1287000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":1287000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":139000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":213000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":490000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":590000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":590000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":282000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":566000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":1148000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":2195000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":2195000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":2195000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":563000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":1214000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":1550000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":1588000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":1588000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":1588000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":40000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":40000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":180000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":180000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":470000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-12-31","val":469000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":469000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":43000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":142000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":147000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":151000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-12-31","val":253000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2017-01-01","end":"2017-12-31","val":253000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-12-31","val":253000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":253000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":7000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":26000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-09-30","val":46000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":93000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":93000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2018-01-01","end":"2018-12-31","val":93000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-12-31","val":93000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":93000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":39000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":102000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-09-30","val":118000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-12-31","val":250000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":250000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2019-01-01","end":"2019-12-31","val":250000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-12-31","val":250000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":33000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":250000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":89000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":165000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-12-31","val":281000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":281000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2020-01-01","end":"2020-12-31","val":281000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-12-31","val":281000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":281000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":154000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":292000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-09-30","val":347000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-12-31","val":1120000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":1120000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2021-01-01","end":"2021-12-31","val":1120000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":1120000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":29000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":1120000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":2716000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-09-30","val":2754000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-12-31","val":3032000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":3032000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2022-01-01","end":"2022-12-31","val":3032000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-12-31","val":3032000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":3032000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":59000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":280000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":313000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":1883000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"start":"2023-01-01","end":"2023-12-31","val":1883000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":34000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"AssetRetirementObligationLiabilitiesSettled":{"label":"Asset Retirement Obligation, Liabilities Settled","description":"Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":1380000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":-75000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":463000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":749000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":749000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":32000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-258000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":335000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":28194000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":28194000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":79000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":80000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":1692000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":2824000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":2824000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":2824000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":884000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":12780000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":14010000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":16394000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":16394000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":16394000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":1685000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":1685000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":2643000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":2643000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":2914000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-12-31","val":8253000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":8253000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":3514000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":3515000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":4574000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":4576000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":1000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-12-31","val":21466000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2017-01-01","end":"2017-12-31","val":21466000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-12-31","val":21466000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":21466000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":6265000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":6265000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-09-30","val":6298000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":6298000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":6298000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2018-01-01","end":"2018-12-31","val":6298000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-12-31","val":6298000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":6298000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-09-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2019"},{"start":"2022-01-01","end":"2022-06-30","val":43000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-09-30","val":43000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-12-31","val":57000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":57000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2022-01-01","end":"2022-12-31","val":57000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-12-31","val":57000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":57000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"}]}},"AssetRetirementObligationRevisionOfEstimate":{"label":"Asset Retirement Obligation, Revision of Estimate","description":"Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":10525000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":10149000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":10149000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-1385000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-1573000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":20995000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":20548000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":20548000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":1147000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":1475000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":3978000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":5892000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":5892000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":5892000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":71000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-113000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":2302000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":932000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":932000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":932000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-264000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":-264000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-258000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":-258000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":439000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-12-31","val":-4181000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":4181000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":215000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":31000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":-12000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":10423000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-488000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-12-31","val":212000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2017-01-01","end":"2017-12-31","val":212000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-12-31","val":212000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":212000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":-85000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":85000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-09-30","val":82000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":562000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":562000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2018-01-01","end":"2018-12-31","val":562000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-12-31","val":562000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":562000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-6000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-7000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-09-30","val":-6000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-12-31","val":309000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":309000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2019-01-01","end":"2019-12-31","val":309000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-12-31","val":309000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":309000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-12-31","val":5000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":5000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2020-01-01","end":"2020-12-31","val":5000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-12-31","val":5000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":5000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":157000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":156000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-09-30","val":157000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-12-31","val":158000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":158000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2021-01-01","end":"2021-12-31","val":158000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":158000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":158000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-09-30","val":321000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-12-31","val":-919000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":-919000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2022-01-01","end":"2022-12-31","val":-919000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-12-31","val":-919000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":-919000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-313000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-382000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":-534000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":-554000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"start":"2023-01-01","end":"2023-12-31","val":-554000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023"}]}},"AssetRetirementObligationsNoncurrent":{"label":"Asset Retirement Obligations, Noncurrent","description":"Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.","units":{"USD":[{"end":"2009-12-31","val":55298000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":55298000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":55298000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":55298000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":57230000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":58650000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":58650000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":70171000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":70171000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":70171000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":70171000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":70171000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":70529000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":71574000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":91237000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":67115000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":67115000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":67115000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":67115000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":67115000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":69552000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":70972000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":77204000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":79643000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":79643000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":79643000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":79643000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":79643000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":79643000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":79523000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":68832000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":68628000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":63225000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":63225000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":63225000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":63225000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":63225000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":63225000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":63225000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":63225000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":64503000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":64503000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":65963000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":65963000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":67155000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":62122000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":62122000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":62122000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":62122000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":62122000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":63632000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":64977000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":65448000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":56390000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":56390000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":57614000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":8678000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":8678000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":8678000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":8678000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":4185000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":4258000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":4158000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":3956000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":3956000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":3956000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":3956000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":3956000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":4073000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":4218000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":4265000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":4055000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":4055000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":4055000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":4055000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":4055000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":4170000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":4312000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":4344000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":4533000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":4533000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":4533000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":4533000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":4533000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":4489000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":4586000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":4706000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":5526000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":5526000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":5526000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":5526000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":5526000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":5644000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":8375000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":8255000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":9171000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":9171000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":9171000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":9171000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":9171000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":9451000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":9619000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":9840000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":11584000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":11584000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":11913000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"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":"2009-12-31","val":1434765000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":1434765000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":1434765000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":1434765000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":1513845000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":1546923000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":1546923000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":1746375000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":1743916000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":1743916000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":1743916000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":1743916000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":1773261000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":1826399000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":1924468000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":2212469000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":2212469000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":2212469000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":2212469000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":2216437000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":2203625000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":2236021000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":2341487000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":2444061000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":2444061000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":2444061000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":2444061000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":2444061000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":2473463000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":2531199000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":2629918000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":2670755000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":2643593000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":2643593000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":2643593000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":2698505000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":2698505000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":2698505000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":2698505000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":2698505000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":2681273000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":2734902000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":2724536000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":2777593000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":2675159000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":2173347000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":2173347000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":2173347000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":2173347000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":2173347000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":1630355000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":1347028000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":1024278000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":524998000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":524998000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":433274000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":551270000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":551270000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":551270000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":551270000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":534395000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":596996000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":680224000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":777520000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":777520000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":777520000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":777520000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":777520000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":822797000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":921188000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":941346000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":959816000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":959816000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":959816000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":959816000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":959816000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":949209000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":598034000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":590679000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":583135000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":583135000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":583135000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":583135000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":583135000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":600450000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":622943000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":698335000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":819454000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":819454000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":819454000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":819454000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":819454000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":831790000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":1452355000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":1589913000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":1716362000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":1716362000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":1716362000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":1716362000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":1716362000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":1784932000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":1840470000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":1930449000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":2734462000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":2734462000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":2695163000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"AssetsCurrent":{"label":"Assets, Current","description":"Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.","units":{"USD":[{"end":"2009-12-31","val":108600000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":108600000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":108600000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":108600000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":107052000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":66475000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":66475000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":160817000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":158358000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":158358000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":158358000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":158358000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":108070000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":100596000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":76637000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":328151000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":328151000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":328151000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":328151000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":332119000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":200025000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":97793000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":62381000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":80537000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":80537000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":80537000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":80537000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":80537000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":87005000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":84299000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":88839000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":80858000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":86748000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":86748000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":86748000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":92489000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":92489000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":92489000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":92489000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":92489000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":88826000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":94250000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":95041000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":100778000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":124182000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":64669000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":64669000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":64669000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":64669000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":64669000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":60936000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":45312000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":48231000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":61847000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":61847000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":40417000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":42569000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":42569000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":42569000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":42569000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":26951000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":33533000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":41120000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":66324000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":66324000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":66324000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":66324000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":66324000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":43674000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":63072000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":60770000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":53308000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":53308000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":53308000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":53308000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":53308000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":107606000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":54032000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":44584000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":34973000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":34973000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":34973000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":34973000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":34973000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":33840000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":31811000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":49862000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":55579000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":55579000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":55579000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":55579000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":55579000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":51583000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":136796000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":144288000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":145726000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":145726000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":145726000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":145726000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":145726000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":148758000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":142214000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":135913000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":261451000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":261451000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":222092000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"AssetsHeldForSaleCurrent":{"label":"Assets Held-for-sale, Current (Deprecated 2014-01-31)","description":"Current assets (normally turning over within one year or one business cycle if longer) that are held for sale apart from normal operations and anticipated to be sold within one year.","units":{"USD":[{"end":"2009-12-31","val":564000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2009-12-31","val":564000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":564000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":564000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2010-06-30","val":564000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":564000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-09-30","val":564000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-12-31","val":564000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2010-12-31","val":564000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":564000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":564000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":564000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2011-03-31","val":564000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":0,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":0,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011Q4I"}]}},"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":"2010-12-31","val":600000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q4I"},{"end":"2011-06-30","val":600000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2011-06-30","val":600000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2011-06-30","val":600000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-06-30","val":600000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-06-30","val":600000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-06-30","val":600000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q2I"},{"end":"2011-09-30","val":600000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3I"},{"end":"2012-06-30","val":600000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-06-30","val":600000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q2I"}]}},"CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities":{"label":"Capitalized Costs, Accumulated Depreciation, Depletion, Amortization and Valuation Allowance Relating to Oil and Gas Producing Activities","description":"Amount of accumulated depreciation, depletion, amortization and valuation allowance relating to oil and gas producing activities.","units":{"USD":[{"end":"2010-12-31","val":2378262000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2010-12-31","val":2378262000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":2378262000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2011-06-30","val":2487813000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":2540613000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":2599079000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q4I"},{"end":"2011-12-31","val":2599079000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2012-03-31","val":2660839000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"}]}},"CapitalizedCostsProvedProperties":{"label":"Capitalized Costs, Proved Properties","description":"Capitalized costs of proved properties incurred for any combination mineral interests acquisitions; wells and related equipment; support equipment and facilities; and uncompleted wells and equipment and other costs not previously disclosed within this table.","units":{"USD":[{"end":"2010-12-31","val":3835173000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":3835173000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":3835173000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-06-30","val":4080741000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":4259439000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":4343867000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":4343867000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":4343867000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":4343867000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":4343867000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":4521651000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":4715417000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":4913556000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":5058524000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":5058524000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":5058524000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":5058524000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":5058524000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":5058524000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":5201142000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":5354887000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":5474748000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":5600279000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":5600279000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":5600279000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":5600279000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":5600279000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":5600279000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":5600279000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":5600279000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":5704702000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":5704702000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":5817395000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":5817395000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":5755886000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":5826995000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":5826995000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":5826995000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":5826995000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":5826995000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":5850175000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":5876399000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":5910250000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":5972666000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":5972666000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":5997030000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":658519000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":658519000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":658519000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":658519000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":664742000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":738780000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":833202000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":925865000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":925865000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":925865000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":925865000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":925865000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":1005988000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":1090496000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":1146106000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":1201296000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":1201296000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":1201296000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":1201296000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":1201296000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":1251110000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":1268374000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":1287962000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":1310008000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":1310008000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":1310008000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":1310008000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":1310008000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":1341385000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":1372163000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":1445818000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":1588978000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":1588978000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":1588978000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":1588978000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":1588978000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":1621948000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":2173225000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":2321809000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":2506853000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":2506853000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":2506853000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":2506853000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":2506853000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":2614332000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":2724110000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":2827145000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":3562268000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":3562268000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":3671913000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"CapitalizedCostsUnprovedProperties":{"label":"Capitalized Costs, Unproved Properties","description":"Capitalized costs of unproved properties incurred for any combination mineral interests acquisitions and other costs not previously disclosed within this table.","units":{"USD":[{"end":"2010-12-31","val":78429000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":78429000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":78429000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-06-30","val":81303000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":79439000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":84146000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":84146000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":84146000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":84146000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":84146000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":87327000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":89005000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":91415000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":92579000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":92579000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":92579000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":92579000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":92579000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":92579000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":94223000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":93990000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":90359000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":71452000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":71452000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":71452000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":71452000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":71452000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":71452000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":71452000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":71452000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":66246000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":66246000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":63662000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":63662000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":65767000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":64903000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":64903000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":64903000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":64903000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":64903000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":64577000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":71118000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":69697000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":18839000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":18839000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":18839000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":50377000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":50377000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":50377000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":50377000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":55725000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":53865000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":54986000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":56715000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":56715000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":56715000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":56715000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":56715000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":64797000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":49866000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":43066000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":41201000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":41201000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":41201000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":41201000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":41201000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":42249000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":30043000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":30661000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":28090000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":28090000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":28090000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":28090000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":28090000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":29113000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":24312000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":24988000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":17090000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":17090000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":17090000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":17090000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":17090000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":23623000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":21412000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":17478000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":16272000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":16272000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":16272000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":16272000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":16272000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":18196000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":26344000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":27821000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":28375000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":28375000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":30899000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"CapitalLeaseObligationsCurrent":{"label":"Capital Lease Obligations, Current","description":"Amount of capital lease obligation due within one year or the normal operating cycle, if longer.","units":{"USD":[{"end":"2018-12-31","val":0,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":860000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":7006000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":6386000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":6707000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":6707000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":6707000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":6707000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":6707000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":6622000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":5972000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":4807000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":3473000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":3473000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":3473000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q4I"},{"end":"2021-03-31","val":2292000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":6029000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"}]}},"CapitalLeaseObligationsNoncurrent":{"label":"Capital Lease Obligations, Noncurrent","description":"Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date.","units":{"USD":[{"end":"2018-12-31","val":0,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":1171000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":5605000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":4154000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":2813000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":2813000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":2813000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":2813000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":2813000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":1397000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":1778000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":1392000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":951000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":951000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":951000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q4I"},{"end":"2021-03-31","val":1126000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":10670000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"}]}},"CapitalLeasesFutureMinimumPaymentsDueCurrent":{"label":"Capital Leases, Future Minimum Payments Due, Next Twelve Months","description":"Amount of minimum lease payments for capital leases due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2010-12-31","val":13000000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"}]}},"CapitalLeasesIncomeStatementLeaseRevenue":{"label":"Capital Leases, Income Statement, Lease Revenue","description":"Total amount of lease revenue realized in the period on leasing arrangements.","units":{"USD":[{"start":"2009-11-01","end":"2009-11-30","val":26000000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"}]}},"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":"2007-12-31","val":5623000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2007Q4I"},{"end":"2008-12-31","val":283000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2008-12-31","val":283000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2008-12-31","val":283000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2008-12-31","val":283000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2008-12-31","val":283000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2008Q4I"},{"end":"2009-06-30","val":231000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2I"},{"end":"2009-09-30","val":154000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-09-30","val":154000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3I"},{"end":"2009-12-31","val":38469000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":38469000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":38469000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":38469000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2009-12-31","val":38469000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2009-12-31","val":38469000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2009-12-31","val":38469000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2009-12-31","val":38469000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2009-12-31","val":38469000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2009Q4I"},{"end":"2010-03-31","val":39101000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1I"},{"end":"2010-06-30","val":43484000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2010-06-30","val":43484000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2I"},{"end":"2010-09-30","val":5508000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":5508000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2010-09-30","val":5508000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3I"},{"end":"2010-12-31","val":86367000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":86367000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":86367000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":86367000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":86367000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2010-12-31","val":86367000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2010-12-31","val":86367000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2010-12-31","val":86367000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2010-12-31","val":86367000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2010-12-31","val":86367000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2010-12-31","val":86367000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2010Q4I"},{"end":"2011-03-31","val":19764000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2011-03-31","val":19764000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1I"},{"end":"2011-06-30","val":32298000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2011-06-30","val":32298000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2I"},{"end":"2011-09-30","val":15999000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2011-09-30","val":15999000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3I"},{"end":"2011-12-31","val":251696000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":251696000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":251696000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":251696000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":251696000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2011-12-31","val":251696000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2011-12-31","val":251696000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2011-12-31","val":251696000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2011-12-31","val":251696000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2011-12-31","val":251696000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2011-12-31","val":251696000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2011Q4I"},{"end":"2012-03-31","val":126789000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2012-03-31","val":126789000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1I"},{"end":"2012-06-30","val":31671000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2012-06-30","val":31671000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2I"},{"end":"2012-09-30","val":1650000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2012-09-30","val":1650000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3I"},{"end":"2012-12-31","val":170000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":170000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":170000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":170000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":170000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":170000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2012-12-31","val":170000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2012-12-31","val":170000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2012-12-31","val":170000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2012-12-31","val":170000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2012-12-31","val":170000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2012-12-31","val":170000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2012-12-31","val":170000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2012Q4I"},{"end":"2013-03-31","val":248000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2013-03-31","val":248000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-03-31","val":248000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1I"},{"end":"2013-06-30","val":11338000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2013-06-30","val":11338000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-06-30","val":11338000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2I"},{"end":"2013-09-30","val":97000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2013-09-30","val":97000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3I"},{"end":"2013-12-31","val":3277000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":3277000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":3277000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":3277000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":3277000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":3277000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":3277000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":3277000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2013-12-31","val":3277000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2013-12-31","val":3277000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2013-12-31","val":3277000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2013-12-31","val":3277000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013Q4I"},{"end":"2014-03-31","val":91000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":91000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2014-03-31","val":91000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1I"},{"end":"2014-06-30","val":564000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":564000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2014-06-30","val":564000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2I"},{"end":"2014-09-30","val":9041000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2014-09-30","val":9041000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3I"},{"end":"2014-12-31","val":406000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":406000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":406000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":406000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":406000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2014-12-31","val":406000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2014Q4I"},{"end":"2015-03-31","val":311000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2015-03-31","val":311000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1I"},{"end":"2015-06-30","val":75000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":7322000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":29460000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":29460000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":17782000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-03-31","val":168000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1I"},{"end":"2017-06-30","val":6627000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2I"},{"end":"2017-09-30","val":12861000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3I"},{"end":"2017-12-31","val":7806000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":7806000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":7806000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":7806000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":237000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":6611000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":4542000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":2465000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":2465000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":2465000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":2465000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":2465000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":876000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":3333000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":2850000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":1358000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":1358000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":1358000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":1358000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":1358000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":35598000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":6610000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":1222000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":2118000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":2118000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":2118000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":2118000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":2118000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":3419000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":2063000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":988000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":1121000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":1121000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":1121000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":1121000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":1121000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":1645000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":9408000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":1924000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":792000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":792000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":792000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":792000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":792000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":2167000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":1102000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":1697000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":969000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":969000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":1446000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"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":"2008-01-01","end":"2008-12-31","val":-5340000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":-52000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":-129000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":-129000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":38186000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":38186000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":632000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":5015000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":5015000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":-32961000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":-32961000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":-32961000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":47898000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":47898000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":47898000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-66603000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":-66603000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-54069000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":-54069000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":-70368000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":-70368000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":165329000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":165329000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":165329000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":165329000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-124907000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":-124907000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-220025000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":-220025000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":-250046000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":-250046000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":-251526000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":-251526000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":-251526000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":-251526000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":78000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":78000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":78000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":11168000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":11168000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":11168000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-09-30","val":-73000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":-73000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":3107000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":3107000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":3107000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":3107000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-3186000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":-3186000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":-3186000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-2713000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":-2713000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":-2713000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":5764000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":5764000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":-2871000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":-2871000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":-95000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":-95000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-331000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":6916000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":29054000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-11678000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"}]}},"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":"2016-12-31","val":497000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2016-12-31","val":497000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2016-12-31","val":497000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2016-12-31","val":497000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2016Q4I"},{"end":"2017-03-31","val":1000000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1I"},{"end":"2017-06-30","val":6806000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2I"},{"end":"2017-09-30","val":13081000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3I"},{"end":"2017-12-31","val":8026000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":8026000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":8026000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":8026000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2017-12-31","val":8026000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2017-12-31","val":8026000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2017-12-31","val":8026000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2017-12-31","val":8026000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2017Q4I"},{"end":"2018-03-31","val":457000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2018-03-31","val":457000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":6831000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2018-06-30","val":6831000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2I"},{"end":"2018-09-30","val":4542000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2018-09-30","val":4542000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":2465000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":2465000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":2465000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":2465000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":2465000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2018-12-31","val":2465000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2018-12-31","val":2465000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2018-12-31","val":2465000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2018-12-31","val":2465000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2018Q4I"},{"end":"2019-03-31","val":876000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2019-03-31","val":876000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1I"},{"end":"2019-06-30","val":3333000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2019-06-30","val":3333000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2I"},{"end":"2019-09-30","val":2850000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2019-09-30","val":2850000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3I"},{"end":"2019-12-31","val":1358000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":1358000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":1358000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":1358000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":1358000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2019-12-31","val":1358000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2019-12-31","val":1358000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2019-12-31","val":1358000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2019-12-31","val":1358000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2019Q4I"},{"end":"2020-03-31","val":35598000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2020-03-31","val":35598000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1I"},{"end":"2020-06-30","val":6610000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2020-06-30","val":6610000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":1222000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2020-09-30","val":1222000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3I"},{"end":"2020-12-31","val":2118000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":2118000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":2118000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":2118000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":2118000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2020-12-31","val":2118000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2020-12-31","val":2118000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2020-12-31","val":2118000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2020-12-31","val":2118000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2020-12-31","val":2118000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2020Q4I"},{"end":"2021-03-31","val":3419000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2021-03-31","val":3419000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1I"},{"end":"2021-06-30","val":2063000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2021-06-30","val":2063000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2I"},{"end":"2021-09-30","val":988000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2021-09-30","val":988000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3I"},{"end":"2021-12-31","val":1121000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":1121000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":1121000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":1121000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":1121000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2021-12-31","val":1121000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2021-12-31","val":1121000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2021-12-31","val":1121000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2021-12-31","val":1121000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021Q4I"},{"end":"2022-03-31","val":1645000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2022-03-31","val":1645000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1I"},{"end":"2022-06-30","val":9408000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2022-06-30","val":9408000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2I"},{"end":"2022-09-30","val":1924000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2022-09-30","val":1924000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3I"},{"end":"2022-12-31","val":792000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":792000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":792000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":792000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":792000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2022-12-31","val":792000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2022Q4I"},{"end":"2023-03-31","val":2167000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2023-03-31","val":2167000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1I"},{"end":"2023-06-30","val":1102000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":1697000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":8729000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":8729000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":9206000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect":{"label":"Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect","description":"Amount of increase (decrease) in cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; excluding 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":"2017-01-01","end":"2017-03-31","val":503000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":6309000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":12584000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":7529000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":-7569000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":-7569000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-1195000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":-1195000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":-3484000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":-3484000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":-5561000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":-5561000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-1589000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":-1589000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":868000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":868000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":385000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":385000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":-1107000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":-1107000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":34240000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":34240000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":5252000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":5252000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":-136000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":-136000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":760000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":760000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":1301000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":1301000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":-55000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":-55000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":-1130000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":-1130000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":-997000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":-997000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":-997000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":524000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":524000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":8287000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":8287000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":803000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":803000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":-329000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":-329000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":1375000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":1375000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":310000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":905000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":7937000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":477000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations":{"label":"Cash Provided by (Used in) Financing Activities, Discontinued Operations","description":"Amount of cash inflow (outflow) of financing activities of 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":"2008-01-01","end":"2008-12-31","val":0,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":0,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":0,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":0,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":0,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"}]}},"CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations":{"label":"Cash Provided by (Used in) Investing Activities, Discontinued Operations","description":"Amount of cash inflow (outflow) of investing activities of 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":"2008-01-01","end":"2008-12-31","val":80504000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":5000000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":5000000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":5000000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":5000000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":5000000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":5000000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":5000000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":5000000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":5000000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":5000000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":5000000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":5000000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":5000000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":5000000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":5000000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":5000000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":5000000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":5000000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":5000000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":5000000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":5000000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":5000000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":5000000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":5000000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"}]}},"CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations":{"label":"Cash Provided by (Used in) Operating Activities, Discontinued Operations","description":"Amount of cash inflow (outflow) of operating activities of discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":6039000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":-337000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":-366000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":-366000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":-396000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-396000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":46000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":4000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":4000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":100000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":-29000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":-29000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":-29000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":-41000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":-41000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":-41000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":99000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":99000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":36000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":36000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":100000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":5000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":5000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":-2000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":-2000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":-2000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":-2000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"}]}},"ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights":{"label":"Class of Warrant or Right, Number of Securities Called by Warrants or Rights","description":"Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.","units":{"shares":[{"end":"2016-04-22","val":4300000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":4300000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":4300000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":4300000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":4300000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":4300000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":4300000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"CommitmentsAndContingencies":{"label":"Commitments and Contingencies","description":"Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur.","units":{"USD":[{"end":"2011-12-31","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-06-30","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":0,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":0,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":0,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":0,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":0,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":0,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":0,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":0,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":0,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":0,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":0,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"}]}},"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":"2009-12-31","val":0.01,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":0.01,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":0.01,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":0.01,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":0.01,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":0.01,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":0.01,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":0.01,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":0.01,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":0.01,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":0.01,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":0.01,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":0.01,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":0.01,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":0.01,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":0.01,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":0.01,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":0.01,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":0.01,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":0.01,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":0.01,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":0.01,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":0.01,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":0.01,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":0.01,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":0.01,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":0.01,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":0.01,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":0.01,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":0.01,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":0.01,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":0.01,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":0.01,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":0.01,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":0.01,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":0.01,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":0.01,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":0.01,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":0.01,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":0.01,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":0.01,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":0.01,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":0.01,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":0.01,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":0.01,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":0.01,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":0.01,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":0.01,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":0.01,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":0.01,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":0.01,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":0.01,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":0.01,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0.01,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":0.01,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":0.01,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":0.01,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":0.01,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":0.01,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":0.01,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":0.01,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":0.01,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":0.01,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":0.01,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":0.01,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":0.01,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":0.01,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":0.01,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":0.01,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":0.01,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":0.01,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":0.01,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":0.01,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":0.01,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":0.01,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":0.01,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":0.01,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":0.01,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":0.01,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":0.01,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":0.01,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":0.01,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":0.01,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":0.01,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":0.01,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":0.01,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":0.01,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":0.01,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":0.01,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":0.01,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":0.01,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":0.01,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":0.01,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":0.01,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":0.01,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":0.01,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":0.01,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":0.01,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":0.01,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":0.01,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":0.01,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":0.01,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":0.01,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":0.01,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":0.01,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":0.01,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"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":"2009-12-31","val":85000000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":85000000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":85000000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":85000000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":85000000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":85000000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":85000000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":85000000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":85000000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":85000000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":85000000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":85000000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":85000000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":150000000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":150000000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":150000000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":150000000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":150000000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":150000000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":150000000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":150000000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":150000000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":150000000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":150000000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":150000000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":150000000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":150000000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":150000000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":150000000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":150000000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":150000000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":150000000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":150000000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":150000000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":150000000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":150000000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":150000000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":150000000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":150000000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":150000000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":150000000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":150000000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":150000000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":150000000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":150000000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":150000000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":150000000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":150000000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":150000000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":150000000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":150000000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":150000000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":150000000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":150000000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":150000000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":150000000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":40000000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":40000000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":40000000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":40000000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":40000000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":40000000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":40000000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":40000000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":40000000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":40000000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":40000000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":40000000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":40000000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":40000000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":40000000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":40000000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":40000000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":40000000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":40000000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":40000000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":40000000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":40000000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":40000000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":40000000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":40000000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":40000000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":40000000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":40000000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":40000000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":40000000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":40000000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":40000000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":40000000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":40000000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":40000000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":40000000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":40000000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":40000000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":40000000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":40000000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":40000000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":40000000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":40000000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":40000000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":40000000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":40000000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":40000000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":40000000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":40000000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":40000000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"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":"2009-12-31","val":37887126,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":37887126,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":37887126,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":37887126,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":38316362,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":38322622,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":38322622,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":42440583,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":42440583,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":42440583,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":42440583,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":42440583,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":42889488,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":42946570,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":42955730,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":42969546,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":42969546,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":42969546,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":42969546,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":42969546,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":43341063,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":43398351,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":43431240,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":43450367,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":43450367,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":43450367,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":43450367,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":43450367,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":43450367,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":43861012,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":43889545,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":43906879,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":43915346,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":43915346,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":43915346,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":43915346,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":43915346,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":43915346,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":43915346,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":43915346,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":44234819,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":44234819,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":44278732,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":44278732,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":44296246,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":44379463,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":44379463,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":44379463,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":44379463,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":44379463,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":44644710,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":44704576,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":44709758,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":44771258,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":44771258,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":44994948,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":11621385,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":11621385,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":11621385,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":11621385,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":11713859,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":11733036,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":11757972,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":11757972,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":11757972,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":11757972,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":11757972,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":11757972,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":11819235,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":11838397,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":11865081,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":11895032,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":11895032,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":11895032,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":11895032,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":11895032,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":12000140,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":12049810,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":12053763,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":12053763,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":12053763,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":12053763,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":12053763,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":12053763,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":12336876,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":12388208,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":13576285,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":16822845,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":16822845,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":16822845,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":16822845,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":16822845,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":17141724,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":22652048,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":22663135,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":22663135,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":22663135,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":22663135,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":22663135,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":22663135,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":23081653,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":23102787,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":25914823,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":25914956,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":25914956,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":26027103,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"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":"2009-12-31","val":37456603,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":37456603,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":37456603,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":37456603,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":37876893,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":37882686,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":37882686,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":41999058,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":41999058,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":41999058,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":41999058,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":41999058,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":42409379,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":42465727,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":42473911,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":42485075,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":42485075,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":42485075,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":42485075,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":42485075,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":42828821,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":42884215,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":42912453,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":42930071,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":42930071,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":42930071,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":42930071,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":42930071,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":42930071,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":43356040,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":43382709,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":43394911,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":43401920,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":43401920,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":43401920,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":43401920,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":43401920,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":43401920,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":43401920,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":43401920,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":43804946,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":43804946,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":43845333,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":43845333,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":43857765,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":43918029,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":43918029,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":43918029,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":43918029,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":43918029,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":44486441,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":44543976,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":44547481,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":44591863,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":44591863,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":44752342,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2016-04-22","val":10000000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":10000000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":10000000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":10000000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":10000000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":10000000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":10000000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01"},{"end":"2017-12-31","val":11570621,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":11570621,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":11570621,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":11570621,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":11652637,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":11667165,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":11692101,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":11692101,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":11692101,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":11692101,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":11692101,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":11692101,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":11742288,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":11757573,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":11783846,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":11806679,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":11806679,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":11806679,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":11806679,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":11806679,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":11885112,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":11933684,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":11936679,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":11936679,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":11936679,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":11936679,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":11936679,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":11936679,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":12159615,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":12196978,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":13384615,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":16631175,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":16631175,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":16631175,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":16631175,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":16631175,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":16812851,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":22306690,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":22309740,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":22309740,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":22309740,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":22309740,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":22309740,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":22309740,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":22602018,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":22617842,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":25429517,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":25429610,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":25429610,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":25523808,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"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":"2009-12-31","val":379000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":379000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":379000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":379000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":383000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":383000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":383000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":424000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":424000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":424000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":424000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":424000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":429000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":429000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":430000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":430000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":430000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":430000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":430000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":430000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":433000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":434000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":434000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":435000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":435000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":435000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":435000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":435000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":435000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":439000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":439000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":439000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":439000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":439000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":439000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":439000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":439000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":439000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":439000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":439000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":442000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":442000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":443000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":443000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":443000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":444000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":444000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":444000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":444000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":444000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":446000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":447000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":447000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":448000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":448000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":450000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":116000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":116000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":116000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":116000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":117000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":117000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":118000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":118000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":118000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":118000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":118000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":118000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":118000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":118000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":119000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":119000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":119000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":119000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":119000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":119000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":120000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":120000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":121000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":121000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":121000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":121000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":121000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":121000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":123000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":124000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":136000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":168000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":168000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":168000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":168000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":168000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":171000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":227000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":227000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":227000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":227000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":227000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":227000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":227000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":231000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":231000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":259000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":259000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":259000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":260000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"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":"2008-01-01","end":"2008-12-31","val":-260076000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":-39553000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-12-31","val":-39553000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-12-31","val":-39553000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":-39553000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-39553000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":26943000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":26900000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":11600000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":36217000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":36217000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":36200000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":9300000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":46379000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":46379000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2010-01-01","end":"2010-12-31","val":46379000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-12-31","val":46379000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":46379000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":46379000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":20087000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":20087000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":61557000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":61557000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":41500000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":41470000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":78323000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":78323000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":16800000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":16766000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":98959000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":98959000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":98959000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":96420000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":3831000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":3831000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":6598000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":6598000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":2767000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":2767000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":9607000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":9607000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":3009000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":3009000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":20939000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":20939000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":21701000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":21701000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":7209000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":13931000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":6722000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":22817000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":8886000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":-19032000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":-2442000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-2442000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":-283427000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014"}]}},"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":"2017-01-01","end":"2017-12-31","val":0.1,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":0.1,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2020-01-01","end":"2020-12-31","val":0.1,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020"}]}},"ContractualInterestExpenseOnPrepetitionLiabilitiesNotRecognizedInStatementOfOperations":{"label":"Contractual Interest Expense on Prepetition Liabilities Not Recognized in Statement of Operations","description":"The amount of contractual interest expense on prepetition liabilities not included in the statement of operations.","units":{"USD":[{"start":"2016-01-01","end":"2016-03-31","val":17300000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"}]}},"ConvertiblePreferredStockSharesAuthorized":{"label":"Convertible Preferred Stock, Shares Authorized (Deprecated 2009-01-31)","description":"The maximum number of nonredeemable convertible preferred shares permitted to be issued by an entity's charter and bylaws.","units":{"shares":[{"end":"2009-12-31","val":5000000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2009-12-31","val":5000000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":5000000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":5000000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2010-06-30","val":5000000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":5000000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-09-30","val":5000000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-12-31","val":5000000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q4I"},{"end":"2010-12-31","val":5000000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2011-03-31","val":5000000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"}]}},"CostsAndExpenses":{"label":"Costs and Expenses","description":"Total costs of sales and operating expenses for the period.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":1233573000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":253530000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":85202000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":341649000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":341649000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":88119000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":88119000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":435062000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":435062000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":87025000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":174857000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":174857000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":87832000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":87832000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":265448000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":265448000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":265448000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":90591000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":90591000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":90591000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":364121000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":364121000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":364121000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":111585000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":111585000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":227141000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":227141000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":115556000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":115556000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":342278000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":342278000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":115137000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":115137000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":464027000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":464027000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":464027000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":466684000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":129996000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":129996000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":259638000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":259638000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":129642000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":129642000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":382844000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":382844000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":123206000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":123206000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":520712000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":520712000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":523713000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":523713000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":134651000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":134651000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":133405000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":266102000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":266102000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":265171000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":131451000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":131451000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":131766000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":403725000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":403120000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":137623000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":137949000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":613518000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":584203000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":584203000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":584203000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":132020000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":132473000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":132473000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":274082000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":276706000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":276706000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":142062000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":144233000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":144233000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":410025000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":410025000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":133319000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":133319000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":982926000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":982926000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":624905000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":624905000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":984583000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":359678000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":1399287000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":414704000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":1979235000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":142575000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"}]}},"CurrentIncomeTaxExpenseBenefit":{"label":"Current Income Tax Expense (Benefit)","description":"Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":-10792000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":-2957000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":-2957000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":1616000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":1616000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":1616000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":1616000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":-1144000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":-1144000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":-1144000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":-1144000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":-12000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":-12000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-12000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":-12000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":314000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":314000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":-410000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2017-01-01","end":"2017-12-31","val":-1954000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":-86000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":-86000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":519000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":519000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":-480000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":-480000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":186000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":186000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":186000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":-25000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":-25000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":527000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"CurrentStateAndLocalTaxExpenseBenefit":{"label":"Current State and Local Tax Expense (Benefit)","description":"Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.","units":{"USD":[{"start":"2018-01-01","end":"2018-12-31","val":1066000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":1100000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":1100000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":-1800000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":-1800000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"}]}},"DebtInstrumentBasisSpreadOnVariableRate":{"label":"Debt Instrument, Basis Spread on Variable Rate (Deprecated 2013-01-31)","description":"The percentage points added to the reference rate to compute the variable rate on the debt instrument.","units":{"pure":[{"end":"2012-06-30","val":0.0325,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":0.0325,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2013-03-31","val":0.0325,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":0.0325,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":0.0325,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"}]}},"DebtInstrumentBasisSpreadOnVariableRate1":{"label":"Debt Instrument, Basis Spread on Variable Rate","description":"Percentage points added to the reference rate to compute the variable rate on the debt instrument.","units":{"pure":[{"start":"2013-01-01","end":"2013-12-31","val":0.0325,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0.0325,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0.0325,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":0.0325,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-04-01","end":"2014-06-30","val":0.0325,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":0.0325,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2"},{"start":"2014-07-01","end":"2014-09-30","val":0.0325,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3"}]}},"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":"2017-12-31","val":273000000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":273000000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":273000000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":273000000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":253000000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":282000000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":324000000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":395000000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":395000000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":395000000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":395000000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":395000000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":431000000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":473000000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":482000000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":479000000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":479000000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":479000000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":479000000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":479000000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":490000000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":470000000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":453000000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":430000000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":430000000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":430000000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":430000000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":430000000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":400000000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":398000000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":398000000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":377000000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":377000000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":377000000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":377000000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":377000000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":350000000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":644000000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":630000000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":692000000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":692000000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":692000000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":692000000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":692000000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":709000000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":726000000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":648000000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":1222000000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":1222000000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":1096000000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"DebtorInPossessionFinancingAmountArranged":{"label":"Debtor-in-Possession Financing, Amount Arranged","description":"Amount debtor-in-possession financing arranged (but not necessarily all borrowed).","units":{"USD":[{"end":"2015-12-31","val":75000000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2016-04-22","val":75000000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":75000000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":75000000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":75000000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":75000000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":75000000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":75000000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"DebtorInPossessionFinancingFeeOnUnusedBorrowings":{"label":"Debtor-in-Possession Financing, Fee on Unused Borrowings","description":"Percentage of fee on unused borrowings under debtor-in-possession financing arrangement.","units":{"pure":[{"end":"2015-12-31","val":0.03,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"}]}},"DebtorInPossessionFinancingUnusedBorrowings":{"label":"Debtor-in-Possession Financing, Unused Borrowings (Deprecated 2016-01-31)","description":"Available additional borrowings under debtor-in-possession financing arrangement.","units":{"USD":[{"end":"2015-12-31","val":45000000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"}]}},"DebtorReorganizationItemsLegalAndAdvisoryProfessionalFees":{"label":"Debtor Reorganization Items, Legal and Advisory Professional Fees","description":"Amount of reorganization items related to legal and advisory professional fees related to entities in bankruptcy.","units":{"USD":[{"start":"2016-01-01","end":"2016-03-31","val":13553000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"}]}},"DebtorReorganizationItemsOtherExpenseIncome":{"label":"Debtor Reorganization Items, Other Expense (Income)","description":"Amount of expense (income) related to reorganization items classified as other.","units":{"USD":[{"start":"2016-01-01","end":"2016-03-31","val":-3124000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"}]}},"DecreaseInRestrictedCash":{"label":"Decrease in Restricted Cash","description":"Amount of cash inflow 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":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-09-30","val":6501000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":6501000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":25994000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":25994000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2017-01-01","end":"2017-03-31","val":653000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-09-30","val":26000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"}]}},"DeferredCreditsAndOtherLiabilitiesCurrent":{"label":"Deferred Credits and Other Liabilities, Current","description":"Carrying amount as of the balance sheet date of unearned revenue or income, not otherwise specified in the taxonomy, which is expected to be taken into income during the current period and current obligations not separately disclosed in the balance sheet (other liabilities, current).","units":{"USD":[{"end":"2013-12-31","val":0,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q4I"},{"end":"2014-06-30","val":12500000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":12500000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-07-15","val":12500000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2014-07-15","val":12500000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-09-30","val":22685000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"}]}},"DeferredIncomeTaxAssetsNet":{"label":"Deferred Income Tax Assets, Net","description":"Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, with jurisdictional netting.","units":{"USD":[{"end":"2019-12-31","val":22669000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":22669000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":22669000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q4I"},{"end":"2020-03-31","val":23433000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"}]}},"DeferredIncomeTaxExpenseBenefit":{"label":"Deferred Income Tax Expense (Benefit)","description":"Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":-164498000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":-29905000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":-21927000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":-21927000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":-13377000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-13377000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":10692000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":20502000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":20502000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":26151000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":26151000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":26151000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":32881000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":32881000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":30790000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":10822000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":10822000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":26077000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":26077000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":36332000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":36332000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":48995000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":48878000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":48878000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":47438000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":2312000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":2312000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":4399000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":4399000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":8239000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":8239000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":16783000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":16783000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":17216000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":17216000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":4377000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":4377000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":4848000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":8670000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":8670000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":9610000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-09-30","val":15162000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":15235000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-6761000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":2652000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":2652000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":2652000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":6248000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":6265000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":6265000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":11869000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":11199000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":11199000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":13507000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":13507000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":-150357000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":-150357000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":-79491000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":-79491000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-80133000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":-80133000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":-80133000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":1014000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":1014000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":-22101000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":-22101000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":21391000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":21391000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":6212000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":6212000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":6212000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":9625000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":9625000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":83086000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"DeferredIncomeTaxLiabilities":{"label":"Deferred Tax Liabilities, Gross","description":"Amount of deferred tax liability attributable to taxable temporary differences.","units":{"USD":[{"end":"2013-12-31","val":394525000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-12-31","val":259922000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":259922000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2017-12-31","val":6217000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-12-31","val":33780000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":33780000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-12-31","val":52118000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":52118000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-12-31","val":15579000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":15579000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-12-31","val":55594000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":55594000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-12-31","val":162133000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":162133000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-12-31","val":271427000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"}]}},"DeferredIncomeTaxLiabilitiesNet":{"label":"Deferred Income Tax Liabilities, Net","description":"Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting.","units":{"USD":[{"end":"2019-12-31","val":1582000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":1582000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":1582000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q4I"},{"end":"2020-03-31","val":1281000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":303000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":303000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":303000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":303000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":303000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":303000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":303000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":6516000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":6516000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":6516000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":6516000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":6516000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":3613000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":7721000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":14012000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":16141000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":16141000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":16141000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":16141000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":16141000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":42753000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":50073000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":49033000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":99227000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":99227000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":94077000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"DeferredRevenueCurrent":{"label":"Deferred Revenue, Current","description":"Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable, classified as current.","units":{"USD":[{"end":"2010-12-31","val":10000000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2010-12-31","val":10000000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":10000000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2011-06-30","val":0,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":0,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011Q4I"}]}},"DeferredTaxAssetsDeferredIncome":{"label":"Deferred Tax Assets, Deferred Income","description":"Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from deferred income.","units":{"USD":[{"end":"2009-12-31","val":3171000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":3171000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":3171000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":3171000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":4468000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":6208000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":6208000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":8806000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":6347000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":6347000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":6347000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":6347000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":2046000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":3310000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":4826000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":6603000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":6603000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":6603000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":6603000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":6603000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":2600000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":4203000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":4864000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":5679000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":5679000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":5679000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":5679000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":5679000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":8262000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":2757000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":2815000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":4324000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":4974000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":4974000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":4974000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":10715000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":10715000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":10715000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":10715000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":10715000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":5572000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":10852000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":4829000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":9795000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":9693000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":6243000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":6243000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":6243000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":6243000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":6243000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":2979000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":512000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":0,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"}]}},"DeferredTaxAssetsGross":{"label":"Deferred Tax Assets, Gross","description":"Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.","units":{"USD":[{"end":"2010-12-31","val":46585000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-12-31","val":72303000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":72303000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-12-31","val":109767000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":109767000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":141020000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-12-31","val":135686000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":164035000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":164035000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-12-31","val":179789000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":179789000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2017-12-31","val":6217000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-12-31","val":32766000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":32766000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-12-31","val":73205000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":73205000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-12-31","val":15276000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":15276000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-12-31","val":49078000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":49078000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-12-31","val":145992000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":145992000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-12-31","val":172200000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"}]}},"DeferredTaxAssetsHedgingTransactions":{"label":"Deferred Tax Assets, Hedging Transactions","description":"Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from hedging transactions.","units":{"USD":[{"end":"2017-12-31","val":29000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2018Q4I"}]}},"DeferredTaxAssetsLiabilitiesNet":{"label":"Deferred Tax Assets, Net","description":"Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting.","units":{"USD":[{"end":"2010-12-31","val":-151218000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-12-31","val":-199964000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":-199964000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-12-31","val":-217564000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":-217564000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":-226231000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-12-31","val":-212410000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":-230490000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013Q4I"},{"end":"2018-12-31","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-06-30","val":21164000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":20427000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":22669000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":22669000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-12-31","val":0,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020Q4I"}]}},"DeferredTaxAssetsNetCurrent":{"label":"Deferred Tax Assets, Net of Valuation Allowance, Current","description":"Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards classified as current.","units":{"USD":[{"end":"2010-12-31","val":6347000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-12-31","val":6603000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":-6603000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-12-31","val":-5679000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":-5679000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":-8262000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-12-31","val":-4974000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":-10715000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":-10715000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-12-31","val":-6243000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":6243000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"}]}},"DeferredTaxAssetsOperatingLossCarryforwards":{"label":"Deferred Tax Assets, Operating Loss Carryforwards","description":"Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.","units":{"USD":[{"end":"2013-12-31","val":337100000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":337100000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013Q4I"},{"end":"2014-12-31","val":405400000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014Q4I"},{"end":"2015-12-31","val":822100000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2016-12-31","val":115000000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-12-31","val":114000000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q4I"},{"end":"2017-12-31","val":278000000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2017Q4I"}]}},"DeferredTaxAssetsOperatingLossCarryforwardsDomestic":{"label":"Deferred Tax Assets, Operating Loss Carryforwards, Domestic","description":"Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards.","units":{"USD":[{"end":"2009-12-31","val":28200000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009Q4I"},{"end":"2010-12-31","val":30715000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2010-12-31","val":30700000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010Q4I"},{"end":"2011-12-31","val":54954000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":54954000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-12-31","val":93600000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":93600000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":93445000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-12-31","val":117984000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":117713000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":117713000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-12-31","val":141896000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":141896000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-12-31","val":287720000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2017-12-31","val":58438000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-12-31","val":71736000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":71736000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-12-31","val":67610000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":67610000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-12-31","val":93293000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":93293000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-12-31","val":97142000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":97142000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-12-31","val":130296000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":130296000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-12-31","val":142694000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"}]}},"DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal":{"label":"Deferred Tax Assets, Operating Loss Carryforwards, State and Local","description":"Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards.","units":{"USD":[{"end":"2011-12-31","val":11377000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-12-31","val":13686000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":13686000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":13686000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-12-31","val":14626000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":14626000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":14626000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-12-31","val":15525000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":15525000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-12-31","val":18384000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"}]}},"DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration":{"label":"Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration","description":"Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are subject to expiration dates.","units":{"USD":[{"end":"2016-12-31","val":305000000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-12-31","val":337000000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q4I"}]}},"DeferredTaxAssetsOther":{"label":"Deferred Tax Assets, Other","description":"Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other.","units":{"USD":[{"end":"2010-12-31","val":7026000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-12-31","val":7580000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":7580000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-12-31","val":5909000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":5909000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":5904000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-12-31","val":6050000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":6042000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":6042000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-12-31","val":4056000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":4056000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-12-31","val":6193000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2017-12-31","val":2190000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-12-31","val":956000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":956000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-12-31","val":874000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":874000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-12-31","val":1029000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":1029000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-12-31","val":2111000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":2111000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-12-31","val":963000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":963000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-12-31","val":1253000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"}]}},"DeferredTaxAssetsOtherLossCarryforwards":{"label":"Deferred Tax Assets, Other Loss Carryforwards","description":"Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible loss carryforwards, classified as other.","units":{"USD":[{"end":"2012-12-31","val":1378000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":1378000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-12-31","val":1295000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":1295000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":1295000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-12-31","val":1294000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":1294000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-12-31","val":1215000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2017-12-31","val":619000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-12-31","val":583000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":583000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-12-31","val":552000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":552000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-12-31","val":610000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":610000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-12-31","val":642000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":642000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-12-31","val":649000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":649000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-12-31","val":683000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"}]}},"DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax":{"label":"Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax","description":"Amount before allocation of valuation allowances of deferred tax asset attributable to deductible alternative minimum tax credit carryforwards.","units":{"USD":[{"end":"2010-12-31","val":2092000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-12-31","val":3451000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":3451000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-12-31","val":2092000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":2092000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":2092000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-12-31","val":2092000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":2092000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":2092000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-12-31","val":2092000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":2092000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-12-31","val":2092000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2017-12-31","val":2000000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01"},{"end":"2017-12-31","val":138000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2018Q4I"}]}},"DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther":{"label":"Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Other","description":"Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences from compensation and benefits, classified as other.","units":{"USD":[{"end":"2012-12-31","val":-9676000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":-9676000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-12-31","val":-9615000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":-9615000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":-9615000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-12-31","val":-9606000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":-9606000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-12-31","val":-9571000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"}]}},"DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost":{"label":"Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost","description":"Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.","units":{"USD":[{"end":"2010-12-31","val":5519000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-12-31","val":7151000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":7151000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-12-31","val":9096000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":9096000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":9096000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-12-31","val":9957000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":9957000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":9957000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-12-31","val":9471000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":9471000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-12-31","val":9953000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2017-12-31","val":872000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-12-31","val":906000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":906000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-12-31","val":1210000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":1210000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-12-31","val":959000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":959000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-12-31","val":579000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":579000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-12-31","val":439000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":439000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-12-31","val":491000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"}]}},"DeferredTaxAssetsTaxDeferredExpenseOther":{"label":"Deferred Tax Assets, Tax Deferred Expense, Other","description":"Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences from provisions, reserves, allowances, and accruals, classified as other.","units":{"USD":[{"end":"2013-12-31","val":28628000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-12-31","val":26388000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":26388000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-12-31","val":22884000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2017-12-31","val":2329000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-12-31","val":920000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-12-31","val":1999000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":1999000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-12-31","val":929000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":929000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-12-31","val":3425000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":3425000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-12-31","val":2589000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":2589000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-12-31","val":2709000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"}]}},"DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations":{"label":"Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Asset Retirement Obligations","description":"Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from asset retirement obligations. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset.","units":{"USD":[{"end":"2012-12-31","val":31413000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-12-31","val":28628000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013Q4I"},{"end":"2018-12-31","val":920000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-12-31","val":960000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":960000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-12-31","val":1074000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":1074000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-12-31","val":1306000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":1306000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-12-31","val":2258000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":2258000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-12-31","val":2842000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"}]}},"DeferredTaxAssetsValuationAllowance":{"label":"Deferred Tax Assets, Valuation Allowance","description":"Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.","units":{"USD":[{"end":"2012-12-31","val":6318000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":6318000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-12-31","val":6703000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":6703000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":6703000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-12-31","val":11327000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":11327000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-12-31","val":553283000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2017-12-31","val":58398000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-12-31","val":42335000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":42335000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":0,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-12-31","val":82618000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":82618000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-12-31","val":67578000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":67578000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-12-31","val":0,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2022Q4I"}]}},"DeferredTaxExpenseFromStockOptionsExercised":{"label":"Deferred Tax Expense from Stock Options Exercised","description":"Amount of deferred tax expense from write-off of the deferred tax asset related to deductible stock options at exercise.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":1100000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":1100000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":300000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":300000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":300000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"}]}},"DeferredTaxLiabilities":{"label":"Deferred Tax Liabilities, Net","description":"Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting.","units":{"USD":[{"end":"2010-12-31","val":-197803000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-12-31","val":-272267000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":272267000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-12-31","val":327331000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":327331000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":367251000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-12-31","val":348096000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":394525000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":230490000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-12-31","val":80133000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":80133000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2017-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-12-31","val":1014000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":1014000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-12-31","val":-21087000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":-21087000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-12-31","val":303000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":303000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-12-31","val":6516000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":6516000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-12-31","val":16141000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":16141000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-12-31","val":99227000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"}]}},"DeferredTaxLiabilitiesDerivatives":{"label":"Deferred Tax Liabilities, Derivatives","description":"Amount of deferred tax liability attributable to taxable temporary differences from derivatives.","units":{"USD":[{"end":"2017-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-12-31","val":2817000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":2817000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-12-31","val":1820000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":1820000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-12-31","val":1653000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":1653000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-12-31","val":0,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":0,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-12-31","val":16943000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":16943000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-12-31","val":35336000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"}]}},"DeferredTaxLiabilitiesLeasingArrangements":{"label":"Deferred Tax Liabilities, Leasing Arrangements","description":"Amount of deferred tax liability attributable to taxable temporary differences from leasing arrangements.","units":{"USD":[{"end":"2018-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-12-31","val":1968000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":1968000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-12-31","val":917000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":917000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-12-31","val":3374000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":3374000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-12-31","val":2536000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":2536000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-12-31","val":2707000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"}]}},"DeferredTaxLiabilitiesNoncurrent":{"label":"Deferred Tax Liabilities, Net, Noncurrent","description":"Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences, with jurisdictional netting and classified as noncurrent.","units":{"USD":[{"end":"2009-12-31","val":123577000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":123577000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":123577000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":123577000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":143444000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":150803000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":150803000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":160024000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":157565000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":157565000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":157565000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":157565000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":164037000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":180484000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":192131000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":206567000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":206567000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":206567000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":206567000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":206567000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":205025000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":208440000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":212876000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":223243000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":223243000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":223243000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":223243000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":223243000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":234493000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":226286000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":230617000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":238622000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":217384000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":217384000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":217384000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":241205000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":241205000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":241205000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":241205000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":241205000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":224230000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":247606000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":229107000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":251482000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":253689000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":86376000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":86376000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":86376000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":86376000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":86376000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":3621000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":512000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":0,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2017-12-31","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-06-30","val":328000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":549000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":1014000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":1014000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":1014000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":1014000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":1014000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":1148000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":1446000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":1706000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":1582000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":1582000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-12-31","val":303000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020Q4I"}]}},"DeferredTaxLiabilitiesOther":{"label":"Deferred Tax Liabilities, Other","description":"Amount of deferred tax liability attributable to taxable temporary differences classified as other.","units":{"USD":[{"end":"2010-12-31","val":-2349000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-12-31","val":-2109000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":2109000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-12-31","val":3300000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":3300000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":3299000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-12-31","val":918000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":919000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":919000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-12-31","val":1596000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":1596000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2017-12-31","val":163000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-12-31","val":28000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":28000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-12-31","val":1000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":1000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-12-31","val":1000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":1000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-12-31","val":1000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":1000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-12-31","val":883000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":883000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-12-31","val":482000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"}]}},"DeferredTaxLiabilitiesPropertyPlantAndEquipment":{"label":"Deferred Tax Liabilities, Property, Plant and Equipment","description":"Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.","units":{"USD":[{"end":"2012-12-31","val":324031000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":363952000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-12-31","val":347178000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":393606000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":393606000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-12-31","val":258326000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":258326000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2017-12-31","val":6054000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-12-31","val":30935000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":30935000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-12-31","val":48329000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":48329000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-12-31","val":13008000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":13008000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-12-31","val":52219000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":52219000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-12-31","val":141771000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":141771000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-12-31","val":232902000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"}]}},"DefinedContributionPlanEmployerDiscretionaryContributionAmount":{"label":"Defined Contribution Plan, Employer Discretionary Contribution Amount","description":"Amount of discretionary contributions made by an employer to a defined contribution plan.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":1400000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":1400000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":1500000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":1500000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":1500000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":1800000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":1800000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":1800000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":1800000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":1800000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":1900000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":700000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2017-01-01","end":"2017-12-31","val":500000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":600000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":600000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":600000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":600000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":600000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":500000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":500000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":500000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":600000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":600000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":800000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"DefinedContributionPlanEmployerMatchingContributionPercent":{"label":"Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay","description":"Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.","units":{"pure":[{"start":"2013-01-01","end":"2013-12-31","val":1,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":1,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":1,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":1,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2018-01-01","end":"2018-12-31","val":1,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":1,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":1,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":1,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":1,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":1,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent":{"label":"Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent","description":"Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.","units":{"pure":[{"start":"2013-01-01","end":"2013-12-31","val":0.06,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0.06,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0.06,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0.06,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2018-01-01","end":"2018-12-31","val":0.06,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":0.06,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":0.06,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":0.06,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":0.06,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":0.06,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"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":"2008-01-01","end":"2008-12-31","val":222288000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":84299000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":40365000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":125310000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":125310000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":41011000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":41011000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":166108000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":166108000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":38274000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":77303000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":77303000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":39029000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":39029000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":118103000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":118103000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":118103000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":40800000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":40800000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":40800000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":162572000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":162572000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":162572000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":52921000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":52921000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":108737000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":108737000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":55816000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":55816000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":163141000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":163141000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":54404000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":54404000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":221230000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":221230000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":221230000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":223081000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":61363000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":61363000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":122651000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":122651000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":61288000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":61288000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":181638000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":181638000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":58987000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":58987000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":247178000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":247178000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":249344000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":249344000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":60120000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":60120000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":60456000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":119578000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":119578000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":120229000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":59458000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":59458000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":59773000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":186526000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":187503000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":66948000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":67274000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":252043000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":252769000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":252769000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":252769000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":61685000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":62651000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":62651000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":133890000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":135741000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":135741000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":72205000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":73090000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":73090000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":201072000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":201072000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":65331000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":65331000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":267590000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":267590000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":60698000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":60698000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":102786000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":42088000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":138392000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":35606000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":177512000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":17245000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":9715000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":20543000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":10828000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":32375000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":11832000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":46933000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":13131000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":13131000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":26228000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":26228000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":13096000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":13096000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":44994000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":44994000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":18766000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":18766000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":68035000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":68035000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":21805000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":21805000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":45834000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":45834000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":24029000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":24029000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":70771000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":70771000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":24937000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":24937000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":95915000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":95915000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":23439000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":23439000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":37156000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":37156000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":13716000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":13716000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":51130000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":51130000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":13975000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":13975000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":64564000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":64564000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":13393000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":13393000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":29431000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":29431000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":16039000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":16039000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":45485000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":45485000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":16054000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":16054000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":68629000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":68629000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":68629000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":21154000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":21154000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":47595000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":47595000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":26441000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":26441000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":89096000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":89096000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":41501000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":41501000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":133982000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":133982000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":43998000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":43998000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":93850000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":49853000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":147037000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":53186000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":219116000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":92103000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"DerivativeAssetsCurrent":{"label":"Derivative Asset, Current","description":"Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.","units":{"USD":[{"end":"2017-12-31","val":5148000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":5148000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":5148000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":5148000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":2704000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":1775000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":2584000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":15261000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":15261000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":15261000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":15261000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":15261000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":8346000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":21738000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":20604000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":12833000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":12833000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":12833000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":12833000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":12833000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":38817000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":20822000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":11850000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":4821000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":4821000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":4821000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":4821000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":4821000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":1958000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":736000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":668000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":2806000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":2806000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":2806000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":2806000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":2806000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":1679000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":10094000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":33205000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":52549000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":52549000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":52549000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":52549000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":52549000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":79979000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":72590000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":50189000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":116549000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":116549000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":89535000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"DerivativeAssetsNoncurrent":{"label":"Derivative Asset, Noncurrent","description":"Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.","units":{"USD":[{"end":"2017-12-31","val":2553000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":2553000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":2553000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-06-30","val":3332000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":2624000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":4333000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":4333000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":4333000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":4333000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":4333000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":4024000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":5910000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":7051000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":3854000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":3854000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":3854000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":3854000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":3854000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":8867000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":4679000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":2291000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":281000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":281000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":281000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":281000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":281000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":769000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":1000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":18000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":201000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":201000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":201000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":201000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":201000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":76000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":5829000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":27410000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":24172000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":24172000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":24172000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":24172000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":24172000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":26645000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":21903000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":14180000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":55114000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":55114000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":29432000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"DerivativeCashReceivedOnHedge":{"label":"Derivative, Cash Received on Hedge","description":"The amount of cash received during the period on settlement of a hedge.","units":{"USD":[{"start":"2020-01-01","end":"2020-09-30","val":76150000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-03-31","val":-3063000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":-10708000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":-28976000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2022-01-01","end":"2022-03-31","val":-24554000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-90603000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"}]}},"DerivativeFairValueOfDerivativeAsset":{"label":"Derivative Asset, Fair Value, Gross Asset","description":"Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.","units":{"USD":[{"end":"2013-12-31","val":800000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":800000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013Q4I"},{"end":"2014-03-31","val":300000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":300000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":200000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":200000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-12-31","val":2500000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014Q4I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"}]}},"DerivativeFairValueOfDerivativeLiability":{"label":"Derivative Liability, Fair Value, Gross Liability","description":"Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.","units":{"USD":[{"end":"2013-12-31","val":900000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":900000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013Q4I"},{"end":"2014-03-31","val":3800000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":3800000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":3100000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":3100000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-12-31","val":100000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014Q4I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2016-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"}]}},"DerivativeFairValueOfDerivativeNet":{"label":"Derivative, Fair Value, Net","description":"Fair value of the assets less the liabilities of a derivative or group of derivatives.","units":{"USD":[{"end":"2013-12-31","val":-100000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":-100000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":-100000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q4I"},{"end":"2014-03-31","val":-3500000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":-3500000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":-2900000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":-2900000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":100000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":2400000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014Q4I"},{"end":"2015-03-31","val":200000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":100000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":100000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2016-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2016-06-30","val":-9500000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09","frame":"CY2016Q2I"},{"end":"2016-09-30","val":5900000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03","frame":"CY2016Q3I"},{"end":"2016-12-31","val":-16400000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-12-31","val":16400000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-12-31","val":16400000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-12-31","val":-16400000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q4I"},{"end":"2017-03-31","val":5600000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08","frame":"CY2017Q1I"},{"end":"2017-06-30","val":1300000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09","frame":"CY2017Q2I"},{"end":"2017-09-30","val":1100000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07","frame":"CY2017Q3I"},{"end":"2017-12-31","val":-100000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01"},{"end":"2017-12-31","val":-100000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":-100000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":-100000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":-100000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":-5400000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":-12100000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":-21100000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":13000000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":13000000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":13000000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":13000000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":13000000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":5600000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":24600000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":26600000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":8400000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":8400000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":8400000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":8400000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":8400000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":45400000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":18800000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":-300000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":-6000000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":-6000000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":-6000000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":-6000000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":-6000000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":-19300000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":-54900000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":-116100000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":-53000000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":-53000000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":-53000000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":-53000000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":-53000000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":-158300000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":-157200000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":-78000000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":28200000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":28200000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":28200000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":28200000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":28200000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":90800000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":82800000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":10100000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":163600000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":163600000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":84500000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"DerivativeFloorPrice":{"label":"Derivative, Floor Price","description":"Floor rate on a price risk derivative such as a floor or a collar. A payment or receipt is triggered if the market rate falls below the floor rate on the contract.","units":{"USD/Boe":[{"end":"2013-03-31","val":93.6,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"}]}},"DerivativeLiabilitiesCurrent":{"label":"Derivative Liability, Current","description":"Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.","units":{"USD":[{"end":"2017-12-31","val":5075000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":5075000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":5075000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":5075000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":7666000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":11742000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":17925000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":2824000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":2824000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":2824000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":2824000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":2824000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":4570000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":2035000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":898000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":6644000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":6644000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":6644000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":6644000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":6644000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":1265000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":4248000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":10420000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":8171000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":8171000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":8171000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":8171000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":8171000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":18193000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":45369000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":94778000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":47453000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":47453000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":47453000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":47453000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":47453000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":140941000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":136185000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":108618000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":40796000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":40796000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":40796000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":40796000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":40796000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":13450000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":9711000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":32752000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":5509000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":5509000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":26333000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"DerivativeLiabilitiesNoncurrent":{"label":"Derivative Liability, Noncurrent","description":"Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.","units":{"USD":[{"end":"2017-12-31","val":2758000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":2758000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":2758000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-06-30","val":5427000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":8352000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":3723000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":3723000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":3723000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":3723000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":3723000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":2197000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":987000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":142000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":1613000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":1613000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":1613000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":1613000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":1613000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":1047000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":2412000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":4045000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":2946000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":2946000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":2946000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":2946000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":2946000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":3869000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":10286000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":21989000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":8585000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":8585000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":8585000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":8585000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":8585000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":19089000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":36913000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":29950000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":7738000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":7738000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":7738000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":7738000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":7738000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":2394000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":2032000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":21560000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":2504000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":2504000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":8110000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"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":"2011-07-01","end":"2011-09-30","val":4700000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3"}]}},"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":"2008-01-01","end":"2008-12-31","val":-8.5,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":-1.97,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":-0.07,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":-1.67,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":-1.67,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":0.21,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":0.21,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":-1.17,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-1.17,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":0.37,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":0.69,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":0.69,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":0.32,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":0.32,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":0.93,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":0.93,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":0.93,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":0.24,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":0.24,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":0.24,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":1.19,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":1.19,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":1.19,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0.47,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":0.47,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":1.42,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":1.42,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":0.95,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":0.95,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":1.81,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":1.81,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":0.39,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":0.39,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":2.29,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":2.29,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":2.33,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":2.27,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":0.08,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":0.08,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":0.15,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":0.15,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":0.07,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":0.07,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":0.22,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":0.23,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":0.07,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":0.07,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":0.48,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":0.49,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":0.51,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":0.51,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0.16,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":0.17,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":0.19,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0.32,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":0.32,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":0.36,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":0.15,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":0.15,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":0.17,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":0.53,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":0.53,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":0.2,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":0.17,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":-0.44,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":-0.06,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-0.06,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":-0.06,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0.12,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":0.12,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":0.12,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":0.31,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":0.28,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":0.28,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":0.18,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":0.16,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":0.16,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":0.34,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":0.34,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":0.06,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":0.06,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-6.47,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":-6.47,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":-10.79,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":-10.79,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-17.35,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":-6.58,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":-25.31,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":-7.96,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":-37.2,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-2.42,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":1.58,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":2.99,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":1.41,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":4.1,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":1.12,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":6.28,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":0.73,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":0.73,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0.93,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":0.93,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":0.2,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":0.2,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":1.53,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":1.53,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":0.61,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":0.61,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":6.4,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":6.4,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":1.37,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":1.37,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":6.89,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":6.89,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":5.51,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":5.51,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":9.24,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":9.24,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":2.35,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":2.35,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":9.76,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":9.76,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-0.5,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":-0.5,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-26.28,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":-26.28,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":-25.69,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":-25.69,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":-26.81,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":-26.81,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":-0.58,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":-0.58,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-25.99,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":-25.99,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":2.36,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":2.36,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":0.7,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":0.7,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":-1.64,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":-1.64,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":-2.24,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":-2.24,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":-2.85,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":-2.85,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":6.61,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":6.61,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":6.61,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-3.84,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":-3.84,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":1.43,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":1.43,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":5.05,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":5.05,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":8.85,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":8.85,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":6.39,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":6.39,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":17.24,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":17.24,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":4.21,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":4.21,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":5.3,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":1.1,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":5.06,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":-0.21,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":12.74,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-0.61,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"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":"2008-01-01","end":"2008-12-31","val":-8.5,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":-1.97,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":-0.07,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":-1.67,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":-1.67,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":0.21,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":0.21,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":-1.17,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-1.17,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":0.37,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":0.69,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":0.69,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":0.32,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":0.32,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":0.93,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":0.93,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":0.93,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":0.24,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":0.24,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":0.24,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":1.18,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":1.18,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":1.18,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0.47,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":0.47,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":1.41,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":1.41,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":0.95,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":0.95,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":1.8,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":1.8,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":0.39,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":0.39,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":2.27,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":2.27,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":2.3,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":2.24,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":0.08,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":0.08,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":0.15,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":0.15,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":0.07,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":0.07,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":0.22,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":0.23,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":0.07,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":0.07,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":0.48,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":0.48,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":0.5,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":0.5,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0.16,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":0.17,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":0.18,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0.32,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":0.32,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":0.36,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":0.15,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":0.15,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":0.17,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":0.52,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":0.53,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":0.2,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":0.17,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":-0.44,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":-0.06,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-0.06,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":-0.06,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0.12,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":0.12,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":0.12,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":0.3,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":0.28,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":0.28,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":0.18,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":0.15,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":0.15,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":0.33,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":0.33,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":0.06,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":0.06,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-6.47,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":-6.47,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":-10.79,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":-10.79,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-17.35,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":-6.58,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":-25.31,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":-7.96,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":-37.2,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-2.42,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":1.57,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":2.97,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":1.41,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":4.08,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":1.12,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":6.25,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":0.72,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":0.72,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0.92,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":0.92,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":0.2,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":0.2,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":1.52,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":1.52,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":0.6,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":0.6,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":6.34,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":6.34,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":1.36,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":1.36,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":6.85,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":6.85,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":5.49,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":5.49,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":9.21,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":9.21,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":2.35,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":2.35,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":9.74,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":9.74,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-0.5,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":-0.5,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-26.28,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":-26.28,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":-25.69,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":-25.69,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":-26.81,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":-26.81,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":-0.58,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":-0.58,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-25.99,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":-25.99,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":2.31,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":2.31,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":0.68,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":0.68,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":-1.64,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":-1.64,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":-2.24,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":-2.24,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":-2.85,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":-2.85,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":6.42,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":6.42,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":6.42,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-3.84,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":-3.84,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":1.4,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":1.4,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":4.95,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":4.95,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":8.69,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":8.69,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":6.29,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":6.29,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":16.94,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":16.94,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":4.17,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":4.17,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":5.27,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":1.1,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":5.02,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":-0.21,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":12.63,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-0.61,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"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":"2009-01-01","end":"2009-12-31","val":0.395,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":0.375,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":0.375,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":0.374,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":0.374,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":0.374,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":0.374,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":0.428,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":0.428,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":0.425,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":0.425,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":0.262,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":13.334,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":13.334,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":13.334,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0.346,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":0.346,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0.143,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-12-31","val":0.046,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2017-01-01","end":"2017-12-31","val":-0.028,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":0.012,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":0.012,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":-0.23,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":-0.23,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":0.175,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-09-30","val":-0.069,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":0.077,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-0.072,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":-0.072,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-12-31","val":0.069,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":0.069,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":0.069,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-0.04,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":0.06,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":0.04,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":0.04,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":0.04,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":0.027,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":0.027,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":0.22,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":0.22,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":0.22,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":0.22,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":0.22,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":0.17,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":0.219,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":0.24,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"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":"2014-01-01","end":"2014-12-31","val":0.35,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0.35,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-12-31","val":0.35,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":0.35,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01"},{"start":"2017-01-01","end":"2017-12-31","val":0.35,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":0.21,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":0.21,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":0.21,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":0.21,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":0.21,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":0.21,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":0.21,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":0.21,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":0.21,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":0.21,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":0.21,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":0.21,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"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":"2017-01-01","end":"2017-12-31","val":-1.118,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":-0.214,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":-0.214,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":-0.455,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":-0.455,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":-0.286,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":-0.286,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":-0.162,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":-0.162,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":-0.162,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":-0.193,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":-0.193,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate":{"label":"Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, 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 income tax rates.","units":{"pure":[{"start":"2017-01-01","end":"2017-12-31","val":0.556,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2018"}]}},"EffectiveIncomeTaxRateReconciliationDeductionsOther":{"label":"Effective Income Tax Rate Reconciliation, Deduction, Other, 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 other deductions.","units":{"pure":[{"start":"2017-01-01","end":"2017-12-31","val":0.023,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":0.002,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":0.002,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":0.001,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":0.001,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":-0.002,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":-0.002,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":0.006,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":0.006,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":0.006,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":-0.001,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":-0.001,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":-0.001,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"EffectiveIncomeTaxRateReconciliationOtherAdjustments":{"label":"Effective Income Tax Rate Reconciliation, Other Adjustments, 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 other adjustments.","units":{"pure":[{"start":"2017-01-01","end":"2017-12-31","val":0.139,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2018"}]}},"EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent":{"label":"Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent","description":"Percentage of the difference, between reported income tax expense (benefit) and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, that is attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority interest income (expense), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, change in enacted tax rate, prior year income taxes, change in deferred tax asset valuation allowance, and other adjustments.","units":{"pure":[{"start":"2017-01-01","end":"2017-12-31","val":0.006,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":0.003,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":0.003,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":0.003,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":0.003,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":0.006,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":0.006,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":0.006,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":0.004,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":0.004,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":0.002,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes":{"label":"Effective Income Tax Rate Reconciliation, State and Local Income Taxes, 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 applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).","units":{"pure":[{"start":"2017-01-01","end":"2017-12-31","val":0.016,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":0.012,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":0.012,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":0.01,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":0.01,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":0.006,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":0.006,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":0.01,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":0.01,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":0.01,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":0.007,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":0.007,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":0.008,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"EmployeeRelatedLiabilitiesCurrent":{"label":"Employee-related Liabilities, Current","description":"Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).","units":{"USD":[{"end":"2010-12-31","val":14298000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-12-31","val":14345000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":14345000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":14345000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":14345000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":14345000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":4957000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":8111000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":10984000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":12297000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":12297000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":12297000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":12297000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":12297000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":12297000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":6842000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":8238000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":10782000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":10938000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":10938000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":10938000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":10938000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":10938000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":10938000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":10938000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":10938000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":10550000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":10550000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":8655000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":8655000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":11212000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":8100000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":8715000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":8715000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":8715000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":8100000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":6080000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":7432000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":7064000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":4059000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":5334000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":5334000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":5334000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":5334000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":1956000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":2945000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":3860000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":4785000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":4785000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":4785000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":4785000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":4785000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":2066000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":3175000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":4079000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":4601000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":4601000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":4601000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":4601000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":4601000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":1865000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":2784000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":3414000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":3771000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":3771000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":3771000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":3771000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":3771000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":1669000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":2579000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":3955000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":7029000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":7029000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":7029000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":7029000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":7029000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":1717000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":2774000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":3775000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":4814000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":4814000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":4814000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":4814000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":4814000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":1510000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":2328000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":3267000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":10208000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":10208000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":7281000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount":{"label":"Share-based Payment Arrangement, Amount Capitalized","description":"Amount of cost capitalized for award under share-based payment arrangement.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":2100000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":800000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":400000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":1200000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":400000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":1600000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":1600000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":1000000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":2000000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":2000000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":1000000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":1000000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":3100000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":3100000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":1100000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":1100000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":4200000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":4200000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":4200000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":4200000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":1300000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":1300000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":2900000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":2900000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":1500000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":1500000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":4100000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":4100000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":1200000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":1200000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":5200000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":5200000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":5200000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":5200000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":1600000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":1600000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":1600000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":3200000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":3200000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":3200000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":1600000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":1600000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":1600000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":4400000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":4400000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":1200000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":1200000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":5500000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":5500000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":5500000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":5500000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":1100000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":1100000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":1100000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":2000000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":2000000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":2000000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":900000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":900000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":900000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":2900000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":2900000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":900000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":900000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":3500000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":3500000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":300000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":300000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":700000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":400000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":1000000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":400000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":1400000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":200000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":100000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":200000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":100000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":100000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":100000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":200000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":100000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":100000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":200000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":200000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":100000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":100000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":300000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":300000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":100000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":100000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":500000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":500000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":200000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":200000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":300000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":300000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":100000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":100000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":400000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":400000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":100000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":100000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":500000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":500000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":100000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":100000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":100000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":100000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":100000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":100000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":200000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":200000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":100000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":100000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":200000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":200000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":100000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":100000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":100000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":100000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":100000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":100000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":200000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":200000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":100000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":100000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":200000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":200000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":200000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":100000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":100000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":100000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":100000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":100000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":100000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":200000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":200000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":100000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":100000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":200000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":200000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":100000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":100000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":100000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":100000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":200000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":100000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":300000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":100000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"EmployeeStockOwnershipPlanESOPCashContributionsToESOP":{"label":"Employee Stock Ownership Plan (ESOP), Cash Contributions to ESOP","description":"This item represents the amount of cash contributions during the period made by the entity to the Employee Stock Ownership Plan (ESOP).","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":200000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":200000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":200000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":200000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":200000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":200000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":200000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":200000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":200000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":200000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":200000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":200000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":200000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":200000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":200000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"}]}},"EmployeeStockOwnershipPlanESOPSharesContributedToESOP":{"label":"Employee Stock Ownership Plan (ESOP), Shares Contributed to ESOP","description":"This item represents the number of shares provided to the Employee Stock Ownership Plan (ESOP) during the period.","units":{"shares":[{"start":"2009-01-01","end":"2009-12-31","val":8347,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":5108,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":5108,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":6729,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":6729,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":6729,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":6729,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":12995,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":12995,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":12995,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":12995,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":14815,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":14815,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":14815,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":14815,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"}]}},"EmployeeStockOwnershipPlanESOPSharesInESOP":{"label":"Employee Stock Ownership Plan (ESOP), Shares in ESOP","description":"Sum of the allocated, committed-to-be-released and suspense shares of the entity held by the plan.","units":{"shares":[{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"}]}},"EquityMethodInvestmentOwnershipPercentage":{"label":"Equity Method Investment, Ownership Percentage","description":"The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.","units":{"pure":[{"end":"2015-12-31","val":1,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2016-03-31","val":1,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"}]}},"EquityMethodInvestments":{"label":"Equity Method Investments","description":"This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.","units":{"USD":[{"end":"2010-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2010-12-31","val":0,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":0,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2011-06-30","val":0,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":0,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011Q4I"}]}},"EquityRestrictions":{"label":"Equity Restrictions","description":"Disclosure of the amount of equity that is restricted to use by regulation or agreement.","units":{"USD":[{"end":"2012-06-30","val":50000000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":50000000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2013-03-31","val":50000000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":50000000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":50000000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"}]}},"ExcessTaxBenefitFromShareBasedCompensationFinancingActivities":{"label":"Excess Tax Benefit from Share-based Compensation, Financing Activities","description":"Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":1422000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2010"}]}},"FairValueAssumptionsExpectedDividendRate":{"label":"Fair Value Assumptions, Expected Dividend Rate (Deprecated 2018-01-31)","description":"Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price).","units":{"pure":[{"end":"2016-04-22","val":0,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":0,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":0,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"FurnitureAndFixturesGross":{"label":"Furniture and Fixtures, Gross","description":"Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.","units":{"USD":[{"end":"2010-12-31","val":37505000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":37505000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":37505000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-06-30","val":38959000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":37344000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":38832000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":38832000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":38832000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":38832000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":38832000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":39709000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":41062000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":41297000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":41690000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":41690000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":41690000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":41690000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":41690000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":41690000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":41907000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":42375000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":41993000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":42368000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":42368000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":42368000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":42368000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":42368000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":42368000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":42368000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":42368000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":42357000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":42357000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":42400000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":42400000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":41997000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":42257000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":42257000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":42257000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":42257000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":42257000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":44088000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":44563000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":43687000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":44252000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":44252000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":44252000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":3270000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":3270000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":3270000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":3270000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":3361000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":3407000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":3520000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":3520000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":3520000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":3520000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":3520000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":3520000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":3668000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":3855000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":4499000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":5220000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":5220000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":5220000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":5220000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":5220000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":5094000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":5134000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":5166000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":5275000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":5275000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":5275000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":5275000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":5275000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":5463000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":5727000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":5780000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":5885000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":5885000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":5885000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":5885000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":5885000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":5926000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":5966000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":6030000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":6098000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":6098000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":6098000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":6098000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":6098000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":6188000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":6240000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":6301000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":6517000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":6517000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":6657000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"GainLossFromPriceRiskManagementActivity":{"label":"Gain (Loss) from Price Risk Management Activity","description":"Gain (loss) incurred in risk management activities.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":26956000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":79000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":138000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":-1610000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":-1610000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":-1689000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":-1689000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":-1304000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-1304000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":-179000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":1670000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":1670000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":1849000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":1849000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":1505000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":1505000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":1505000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":-165000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":-165000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":-165000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":1797000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":1797000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":1797000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-123000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":-123000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-1908000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":-1908000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":-1785000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":-1785000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":-2499000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":-2499000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":-591000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":-591000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":-3210000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":-3210000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":-3210000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":-3210000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-264000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":-264000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":2513000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":2513000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":2777000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":2777000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":3317000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":3317000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":804000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":804000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":3096000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":3096000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":3096000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":3096000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":-240000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":-240000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":-240000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":1334000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":1334000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":1334000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":1574000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":1574000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":1574000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":-714000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":-714000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":-2048000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":-2048000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":-828000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":-828000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-828000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":-828000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-4877000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":-4877000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":-4877000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-7370000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":-7370000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":-2493000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":-2493000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":-2472000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":4898000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":1666000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":1666000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":979000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-12-31","val":-1549000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"}]}},"GainLossOnDerivativeInstrumentsNetPretax":{"label":"Gain (Loss) on Derivative Instruments, Net, Pretax","description":"Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.","units":{"USD":[{"start":"2017-01-01","end":"2017-03-31","val":10936000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":16068000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":5132000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":14465000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":-1603000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":17913000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":-6355000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":-6355000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-17107000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":-17107000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":-10752000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":-10752000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":-30707000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":-30707000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":-13600000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":-13600000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":-9777000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":-9777000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-4022000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":-4022000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":20903000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":20903000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":24925000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":24925000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":34312000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":34312000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":13409000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":13409000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":24242000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":24242000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":88287000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":88287000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":79829000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":79829000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":-8458000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":-8458000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":66884000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":66884000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":-12944000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":-12944000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":61304000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":61304000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":-18259000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":-18259000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":-64326000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":-64326000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":-46067000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":-46067000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":-152879000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":-152879000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":-88554000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":-88554000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":-123018000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":-123018000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":-123018000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-140242000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":-140242000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-162648000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":-162648000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":-22406000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":-22406000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":-157816000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":-157816000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":4832000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":4832000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":-73885000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":-73885000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":92249000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":92249000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":112243000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":19993000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":57604000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":-54639000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":241309000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-56078000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"GainLossOnPriceRiskDerivativesNet":{"label":"Gain (Loss) on Price Risk Derivatives, Net","description":"The aggregate net gain (loss) on price risk derivatives included in earnings in the period.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":-1400000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":1000000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":1500000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":-800000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":-200000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":700000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":700000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-200000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-1000000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":1000000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":-800000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":800000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":-800000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":-800000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":300000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":300000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":-900000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":-900000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":-900000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":-900000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-400000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":-400000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":2300000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":2300000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":2600000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":2600000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":2500000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":2500000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":200000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":200000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":2300000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":2300000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":2300000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":2300000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":-300000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":-300000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":-300000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":1200000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":1500000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":1500000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":1500000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":-800000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":-800000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":-2000000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":-2000000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":-900000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":-900000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-900000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":-900000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-5100000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":-5100000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":-5100000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-04-01","end":"2014-06-30","val":-2700000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":-2700000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":-2700000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":-2700000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":-2700000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":5000000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":5000000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":1300000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":1300000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":300000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":300000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-04-01","end":"2015-06-30","val":-100000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":300000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":100000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":200000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":10900000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":16100000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":5100000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":14500000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":-1600000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":17900000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":-6400000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":-6400000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-17100000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":-17100000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":-10800000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":-10800000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":-30700000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":-30700000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":-13600000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":-13600000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":-9800000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":-9800000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-4000000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":-4000000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":20900000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":20900000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":25000000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":25000000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":34300000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":34300000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":13400000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":13400000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":24200000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":-24200000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":88300000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":88300000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":79800000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":79800000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":-8500000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":-8500000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":66900000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":66900000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":-12900000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":-12900000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-61300000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":-61300000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":-18300000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":-18300000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":-64300000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":-64300000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":-46100000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":-46100000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":-152900000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":-152900000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":-88600000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":-88600000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":123000000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":123000000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":123000000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-139000000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":-139000000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-161200000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":-161200000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":-22200000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":-22200000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":-162500000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":-162500000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":-1300000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":-1300000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":78000000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":78000000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":91200000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":91200000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":110200000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":18900000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":56500000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":-53700000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":-235800000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-42700000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"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":[{"start":"2017-01-01","end":"2017-03-31","val":10937000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":16068000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":14465000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":17913000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":-6355000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":-6355000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-17107000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":-17107000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":-30707000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":-30707000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":-9777000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":-9777000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-4022000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":-4022000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":20903000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":20903000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":34312000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":34312000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":24242000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":24242000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":88287000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":88287000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":79829000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":79829000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":66884000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":66884000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":61304000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":61304000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":-18259000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":-18259000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":-64326000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":-64326000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":-152879000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-12-31","val":-123018000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":-123018000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":-123018000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-140242000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":-24554000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-162648000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":-90603000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":-157816000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":-73885000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":-73885000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":18699000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":92249000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":47481000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":57604000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":241309000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-56078000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"GasGatheringTransportationMarketingAndProcessingCosts":{"label":"Gas Gathering, Transportation, Marketing and Processing Costs (Deprecated 2018-01-31)","description":"Cost incurred related to the gas activities, such as transportation, marketing and processing crude oil, natural gas and refined petroleum products.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":15722000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":15722000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":4594000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":9315000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":4721000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":13674000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":4359000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":18175000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":19467000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":19467000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":6030000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":6030000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":4738000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":10895000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":10895000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":9603000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":4865000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":4865000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":4865000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":16678000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":15386000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":5783000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":5783000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":22336000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":21044000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":21044000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":21044000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":5292000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":5292000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":5292000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":11305000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":11305000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":11305000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":6013000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":6013000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":6013000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":16412000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":16412000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":5107000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":5107000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":21140000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":21140000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":5323000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":5323000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":10409000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":5086000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":15855000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":5446000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":21741000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":5055000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":4385000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":9146000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":4761000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2018-01-01","end":"2018-03-31","val":5025000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":10446000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":5421000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2"}]}},"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":"2008-01-01","end":"2008-12-31","val":38673000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":16000000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":7581000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":24830000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":24830000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":8830000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":8830000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":34046000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":34046000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":9251000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":17288000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":17288000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":8037000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":8037000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":26010000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":26010000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":26010000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":8722000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":8722000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":8722000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":36359000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":36359000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":36359000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":10443000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":10443000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":21309000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":21309000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":10866000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":10866000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":32687000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":32687000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":11378000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":11378000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":45362000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":45362000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":45362000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":45325000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":11883000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":11883000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":24073000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":24073000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":12190000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":12190000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":36025000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":36025000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":11952000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":11952000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":46778000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":46778000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":47097000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":47097000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":12725000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":12725000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":12725000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":23916000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":23916000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":23916000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":11191000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":11191000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":11191000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":35062000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":35062000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":11146000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":11146000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":45802000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":45423000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":45423000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":45423000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":10739000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":10526000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":10526000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":23151000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":22584000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":22584000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":12412000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":12058000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":12058000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":33565000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":33565000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":10981000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":10981000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":39629000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":39629000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":12556000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":12556000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":22846000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":10290000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":31525000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":8679000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":42611000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":8118000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":9834000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":16645000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":6811000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":22676000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":6031000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":30000000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":5576000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":5576000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":11370000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":11370000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":5794000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":5794000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":16856000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":16856000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":5486000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":5486000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":22570000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":22570000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":6276000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":6276000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":12900000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":12900000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":6624000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":6624000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":19146000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":19146000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":6247000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":6247000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":24851000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":24851000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":5913000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":5913000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":12093000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":12093000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":6180000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":6180000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":17926000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":17926000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":5833000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":5833000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":22608000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":22608000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":4782000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":4782000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":9616000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":9616000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":4834000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":4834000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":14872000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":14872000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":5257000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":5257000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":21799000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":21799000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":21799000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":4786000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":4786000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":10497000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":10497000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":5710000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":5710000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":14840000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":14840000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":4343000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":4343000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":21395000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":21395000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":7664000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":7664000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":12982000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":5318000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":17421000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":4438000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":24520000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":8791000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"ImpairmentOfOilAndGasProperties":{"label":"Impairment of Oil and Gas Properties","description":"The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":754298000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":79312000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":0,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":79312000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":79312000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":0,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":0,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":79312000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":79312000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":0,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":0,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":0,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":73911000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":46948000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":46948000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":46948000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":0,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":0,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":0,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":445396000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":445396000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":502569000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":502569000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":763073000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":260504000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":1084595000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":321522000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":1562086000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":77732000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":95606000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":95606000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":355948000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":355948000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":260342000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":260342000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":355948000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":355948000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":355948000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":355948000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":0,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":0,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":0,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":0,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":0,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":0,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":0,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":0,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":0,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":0,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":0,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":0,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":0,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":0,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":0,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"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":"2009-01-01","end":"2009-12-31","val":-64617000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":41889000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":19068000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":56944000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":15055000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":74308000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":32493000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":74365000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":41872000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":101760000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":27395000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":135104000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":5882000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2020-01-01","end":"2020-09-30","val":-298123000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":-7468000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2021-01-01","end":"2021-03-31","val":28380000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":8429000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":-19951000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":-27922000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":-27922000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":-36351000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":-36351000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2022-01-01","end":"2022-03-31","val":-67009000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":-67009000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":26147000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":26147000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":93156000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":93156000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":174754000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":174754000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":148607000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":148607000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2023-01-01","end":"2023-03-31","val":121304000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":121304000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":153592000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":32288000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":147872000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":-5720000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2024-01-01","end":"2024-03-31","val":-20315000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments":{"label":"Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest","description":"Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":-412758000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":-94250000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":-2281000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":-86106000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":-86106000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":8144000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":8144000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":-64617000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-64617000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":22821000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":41889000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":41889000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":19068000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":19068000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":56944000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":56944000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":56944000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":15055000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":15055000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":15055000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":74308000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":74308000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":74308000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":32493000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":32493000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":74365000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":74365000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":41872000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":41872000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":101760000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":101760000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":27395000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":27395000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":135104000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":135104000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":135104000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":131125000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":5882000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":5882000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":10997000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":10997000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":5115000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":5115000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":16541000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":16541000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":5544000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":5544000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":36578000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":36578000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":37773000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":37773000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":11586000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":11586000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":12886000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":22601000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":22601000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":25197000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":11015000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":11015000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":12311000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":37979000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":38181000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":15378000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":12984000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":-25805000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":198000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":198000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":198000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":11661000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":11707000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":11707000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":25320000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":23468000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":23468000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":13659000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":11761000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":11761000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":28943000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":28943000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":5475000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":5475000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-433470000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":-433470000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":-556568000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":-556568000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-850077000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":-293509000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":-1204665000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":-354588000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":-1734514000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-108303000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":17710000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":33951000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":16241000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":46834000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":12884000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":70017000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":8466000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":8466000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":11115000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":11115000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":2647000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":2647000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":18416000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":18416000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":7300000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":7300000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":75543000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":75543000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":16285000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":16285000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":60254000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":60254000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":43969000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":43969000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":88944000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":88944000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":28690000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":28690000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":93074000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":93074000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-7099000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":-7099000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-290655000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":-290655000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":-283556000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":-283556000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":-298123000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":-7468000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-288471000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":28380000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":8429000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":-19951000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2"}]}},"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":"2008-01-01","end":"2008-12-31","val":-257130000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":-61213000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":-2210000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":-53655000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":-53655000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":7558000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":7558000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":-39076000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-39076000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":14240000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":26753000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":26753000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":12513000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":12513000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":36156000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":36156000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":36156000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":9403000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":9403000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":9403000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":46475000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":46475000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":46475000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":20249000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":20249000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":46931000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":46931000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":26682000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":26682000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":63938000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":63938000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":17007000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":17007000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":84610000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":84610000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":84610000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":82071000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":3570000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":6598000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":3028000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":9720000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":3122000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":20939000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":20939000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":21701000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":-19032000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":-2442000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"}]}},"IncomeLossFromContinuingOperationsPerBasicShare":{"label":"Income (Loss) from Continuing Operations, Per Basic Share","description":"The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period.","units":{"USD/shares":[{"start":"2008-01-01","end":"2008-12-31","val":-8.39,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":-1.97,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":-0.07,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":-1.66,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":-1.66,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":0.21,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":0.21,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":-1.16,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-1.16,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":0.37,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":0.7,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":0.7,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":0.32,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":0.32,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":0.94,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":0.94,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":0.94,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":0.24,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":0.24,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":0.24,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":1.19,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":1.19,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":1.19,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0.47,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":0.47,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":1.09,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":1.09,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":0.62,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":0.62,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":1.48,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":1.48,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":0.39,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":0.39,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":1.96,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":1.96,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":2,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":1.94,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":0.08,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":0.15,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":0.07,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":0.22,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":0.07,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":0.48,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":0.49,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":0.51,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":-0.44,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":-0.06,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"}]}},"IncomeLossFromContinuingOperationsPerDilutedShare":{"label":"Income (Loss) from Continuing Operations, Per Diluted Share","description":"The amount of net income (loss) derived from continuing operations during 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":"2008-01-01","end":"2008-12-31","val":-8.39,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":-1.97,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":-0.07,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":-1.66,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":-1.66,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":0.21,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":0.21,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":-1.16,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-1.16,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":0.37,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":0.69,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":0.69,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":0.32,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":0.32,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":0.93,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":0.93,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":0.93,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":0.24,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":0.24,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":0.24,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":1.18,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":1.18,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":1.18,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0.47,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":0.47,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":1.08,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":1.08,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":0.61,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":0.61,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":1.47,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":1.47,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":0.39,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":0.39,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":1.95,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":1.95,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":1.97,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":1.91,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":0.08,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":0.15,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":0.07,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":0.22,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":0.07,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":0.48,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":0.48,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":0.5,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":-0.44,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":-0.06,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"}]}},"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":"2008-01-01","end":"2008-12-31","val":-3360000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":-183000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":-57000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":-215000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":-215000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":-32000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":-32000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":-254000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-254000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":-35000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":-89000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":-89000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":-54000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":-54000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":-162000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":-162000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":-162000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":-73000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":-73000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":-73000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":-181000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":-181000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":-181000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-68000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":-68000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":14278000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":14278000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":14346000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":14346000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":14247000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":14247000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":-31000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":-31000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":14211000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":14211000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":14211000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":14211000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"}]}},"IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare":{"label":"Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share","description":"Per basic 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.","units":{"USD/shares":[{"start":"2008-01-01","end":"2008-12-31","val":-0.11,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":-0.01,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":0,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":-0.01,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":-0.01,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":0,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":0,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":-0.01,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-0.01,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":0,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":0,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":0,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":0,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":0,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":0,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0.33,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":0.33,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":0.33,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":0.33,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":0.33,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":0.33,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":0,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":0.33,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":0.33,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":0.34,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":0.34,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"}]}},"IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare":{"label":"Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share","description":"Per 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.","units":{"USD/shares":[{"start":"2008-01-01","end":"2008-12-31","val":-0.11,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":-0.01,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":0,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":-0.01,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":-0.01,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":0,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":0,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":-0.01,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-0.01,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":0,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":0,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":0,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":0,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":0,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":0,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0.33,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":0.33,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":0.33,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":0.33,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":0.33,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":0.33,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":0,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":0.33,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":0.33,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":0.33,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":0.33,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"}]}},"IncomeTaxEffectsAllocatedDirectlyToEquityCumulativeEffectOfChangeInAccountingPrinciple":{"label":"Income Tax Effects Allocated Directly to Equity, Cumulative Effect of Change in Accounting Principle","description":"Amount of cumulative tax effect on beginning retained earnings from change in accounting principle.","units":{"USD":[{"start":"2007-01-01","end":"2007-01-31","val":1000000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2007-01-01","end":"2007-01-31","val":1000000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"}]}},"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":"2008-01-01","end":"2008-12-31","val":-155628000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":-33037000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":-71000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":-32451000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":-32451000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":586000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":586000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":-25541000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-25541000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":8581000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":15136000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":15136000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":6555000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":6555000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":20788000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":20788000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":20788000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":5652000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":5652000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":5652000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":27833000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":27833000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":27833000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":12244000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":12244000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":27434000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":27434000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":15190000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":15190000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":37822000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":37822000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":10388000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":10388000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":50494000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":50494000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":50494000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":49054000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":2312000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":2312000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":4399000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":4399000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":2087000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":2087000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":6821000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":6821000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":2422000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":2422000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":15639000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":15639000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":16072000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":16072000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":4377000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":4377000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":4848000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":8670000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":8670000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":9610000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":4293000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":4293000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":4762000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":15162000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":15235000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":6492000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":5625000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":-6773000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":2640000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":2640000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":2640000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":6248000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":6265000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":6265000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":11869000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":11199000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":11199000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":5621000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":4934000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":4934000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":14200000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":14200000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":3001000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":3001000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-150043000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":-150043000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":-79491000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":-79491000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-80133000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":-642000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":-80133000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":0,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":-80543000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":-1954000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":328000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":328000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":328000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":328000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":549000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":549000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":220000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":220000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":928000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":928000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":232000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":232000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-20503000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":-20503000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":-20735000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":-20735000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":-19464000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":-19464000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":1039000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":1039000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":-21582000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":-21582000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-1241000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":-1241000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":21179000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":21200000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-06-30","val":21179000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":22420000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":22420000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":20607000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":20607000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":-572000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":-572000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":20911000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":20911000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":0,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":-408000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":-408000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":-408000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":-408000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":6398000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":6398000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":6398000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-2754000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":-2754000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":1612000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":1612000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":4366000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":4366000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":7678000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":7678000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":6066000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":6066000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":9600000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":9600000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":26812000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":26812000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":34163000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":7351000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":33214000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":-949000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":83613000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-4787000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"IncomeTaxExpenseBenefitContinuingOperations":{"label":"Income Tax Expense (Benefit), Continuing Operations (Deprecated 2013-01-31)","description":"The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to pretax Income or Loss from continuing operations; income tax expense or benefit may include interest and penalties on tax uncertainties based on the entity's accounting policy.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":-25541000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":27833000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":50494000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011"}]}},"IncomeTaxesPaid":{"label":"Income Taxes Paid","description":"The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.","units":{"USD":[{"start":"2012-01-01","end":"2012-06-30","val":198000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":248000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-06-30","val":178000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":178000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":178000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-09-30","val":208000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":208000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":150000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":150000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":150000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":150000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":150000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":450000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"}]}},"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":"2008-01-01","end":"2008-12-31","val":8505000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":229000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":232000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":232000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":233000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":233000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":0,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":168000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":168000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":168000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":168000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":168000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":200000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":200000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":200000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":1420000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":1420000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":1620000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":1620000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":1770000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":1770000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":1770000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":1770000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":1770000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":1770000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-06-30","val":198000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":248000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":248000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":248000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":248000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":248000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":217000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":217000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":217000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":217000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":150000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":150000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":450000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1"}]}},"IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance":{"label":"Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount","description":"Amount 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 increase (decrease) in the valuation allowance for deferred tax assets.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":-1082000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":1681000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":1681000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":2273000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":2273000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":2273000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":2273000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":2070000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":2370000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":2370000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":2370000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":385000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":385000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":385000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":385000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":4635000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":4635000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":542289000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"}]}},"IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate":{"label":"Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount","description":"The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":-22616000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":26008000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":26008000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":47282000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":47282000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":47282000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":45889000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":12803000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":12803000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":13221000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":13221000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":-9032000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":69000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":69000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":69000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":-151714000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":-151714000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":-607080000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"}]}},"IncomeTaxReconciliationNondeductibleExpense":{"label":"Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount","description":"Amount 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 nondeductible expenses.","units":{"USD":[{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":558000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":558000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":558000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":558000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":2409000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":2409000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":1703000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"}]}},"IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost":{"label":"Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount","description":"Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for award under share-based payment arrangement. Includes, but is not limited to, expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":105000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":867000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":867000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":1537000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":1537000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":1537000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":1537000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":1911000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":1911000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":1911000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":1911000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":1127000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":1127000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":1127000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":1127000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":666000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":666000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":252000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"}]}},"IncomeTaxReconciliationOtherAdjustments":{"label":"Effective Income Tax Rate Reconciliation, Other Adjustments, Amount","description":"Amount 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 other adjustments.","units":{"USD":[{"start":"2012-01-01","end":"2012-12-31","val":-977000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014"}]}},"IncomeTaxReconciliationOtherReconcilingItems":{"label":"Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount","description":"Amount 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 tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority noncontrolling interest income (loss), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, increase (decrease) in enacted tax rate, prior year income taxes, increase (decrease) in deferred tax asset valuation allowance, and other adjustments.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":8000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":354000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":354000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":560000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":560000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":560000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":561000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":796000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":496000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":497000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":497000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":285000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":285000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":285000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":285000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":-392000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":-392000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":24000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"}]}},"IncomeTaxReconciliationStateAndLocalIncomeTaxes":{"label":"Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount","description":"Amount 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 state and local income tax expense (benefit).","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":-1956000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":641000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":641000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":1505000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":1505000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":-1158000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":-1206000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":-110000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":-964000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":-950000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":-950000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":-496000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":-184000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-184000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":-184000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":-5935000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":-5935000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":-18064000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"}]}},"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":"2008-01-01","end":"2008-12-31","val":-3915000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":-7406000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":-4119000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":-4119000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":1977000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":1977000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":-10809000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":-10780000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":-10780000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":-5812000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":-5812000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":-5812000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":472000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":472000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":472000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-3112000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":-3112000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":983000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":983000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":8077000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":8077000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":10134000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":10134000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":10134000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":10610000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-7913000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":-7913000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-3313000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":-3313000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":-3051000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":-3051000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":-2102000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":-2102000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":-1013000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":-1013000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":3085000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":3085000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":1800000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":3605000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":3605000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":2320000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-09-30","val":3873000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":2588000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":5582000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":2607000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":2607000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":2607000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":6885000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":6288000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":6288000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":4852000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":5895000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":5895000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":7299000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":7299000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":1505000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":1505000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":-9646000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":-9646000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-3997000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":-4768000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":-15003000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":5185000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":-3436000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":4437000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":1605000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":6089000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":-9497000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":-9497000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-8439000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":-8439000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":-2612000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":-2612000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":-2686000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":-2686000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-9105000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":-9105000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-6928000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":-6928000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":-8824000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":-8824000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":-7100000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":-7100000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-6937000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":-6937000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-10137000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":-10137000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":-3981000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":-3981000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":-977000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":-977000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":10301000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":10301000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":-502000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":-502000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":7215000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":7215000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":17507000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":17507000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":17507000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-10144000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":-10144000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-1254000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":-1254000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":20260000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":20260000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":11788000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":11788000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-24504000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":-24504000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-21916000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":-5320000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":7172000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":24557000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"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":"2008-01-01","end":"2008-12-31","val":26172000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":2526000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":2874000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":2874000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":2666000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-2666000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":-713000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":2951000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":-2951000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":1837000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":1837000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":-1837000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":-6691000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":6691000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":6691000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-13612000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":13612000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-1682000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":-1682000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":-6694000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":-6694000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":12625000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":12625000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":12625000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":11303000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-3193000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":-3193000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-12501000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":-12501000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":-14385000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":-14385000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":-3235000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":-3235000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":1534000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":1534000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":5191000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":5191000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":5245000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-601000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":-601000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":1064000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-09-30","val":3696000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":3293000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":5779000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":1894000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":1894000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":1894000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":2335000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":2834000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":2834000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-2132000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":-1360000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":-1360000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":-14159000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":-14159000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":-21411000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":-21411000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":-7880000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":-7880000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-9041000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":-11841000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":-26747000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-3167000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":1942000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":1486000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":3884000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":7169000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":-4005000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":-4005000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-2332000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":-2332000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":6533000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":6533000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":20470000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":20470000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-14401000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":-14401000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-13411000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":-13411000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":-13746000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":-13746000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":-11605000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":-11605000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-9436000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":-9436000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-14293000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":-14293000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":-7413000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":-7413000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":-9011000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":-9011000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":878000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":878000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":1387000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":1387000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":20941000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":20941000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":23513000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":23513000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":23513000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-2794000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":-2794000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":34422000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":34422000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":47320000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":47320000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":29522000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":29522000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-30687000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":-30687000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-26297000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":-9129000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":25439000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":5374000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"IncreaseDecreaseInAccruedIncomeTaxesPayable":{"label":"Increase (Decrease) in Income Taxes Payable","description":"The increase (decrease) during the period in the amount due for taxes based on the reporting entity's earnings or attributable to the entity's income earning process (business presence) within a given jurisdiction.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":214000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":-241000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":-293000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":-293000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":-204000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-204000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":126000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":-41000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":-41000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":-38000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":-38000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":-38000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":247000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":247000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":247000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":2000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":2000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-217000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":-217000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":-234000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":-234000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":-73000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":-73000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":-73000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":-73000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-06-30","val":-198000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":-198000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":-248000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":-248000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":82000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":82000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":82000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":82000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-06-30","val":-178000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":-178000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":-178000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-09-30","val":-208000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":-208000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-224000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":-224000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-224000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":-224000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-06-30","val":-150000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":-150000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":-150000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":543000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":543000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":314000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":314000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":-450000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":-435000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":53000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":53000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":217000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":217000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":519000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":519000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-176000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":-176000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":92000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":92000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":-480000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":-480000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":-480000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":-480000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":83000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":83000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":83000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":149000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":149000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":304000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":304000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":-21000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":-21000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":-229000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":-229000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":300000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":300000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":229000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":321000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":525000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":465000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"IncreaseDecreaseInDeferredIncomeTaxes":{"label":"Increase (Decrease) in Deferred Income Taxes","description":"The increase (decrease) during the reporting period in the account that represents the temporary difference that results from Income or Loss that is recognized for accounting purposes but not for tax purposes and vice versa.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":-32881000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":-48995000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":-48995000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":-47555000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":-16798000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":-16798000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":-17231000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":-17231000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":6766000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":-2647000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-2647000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":-2647000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":150357000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":150357000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":80133000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2017-01-01","end":"2017-06-30","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-328000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":-328000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":549000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":-549000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":-1014000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":-1014000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-134000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":-134000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":20732000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":20732000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":19735000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":19735000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":22101000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":22101000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":1065000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":1065000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-21087000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":-21087000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":-21087000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":-21087000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":-21390000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":-21390000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":-6212000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":-6212000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":-6212000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":2902000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":2902000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-1205000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":-1205000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":-7496000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":-7496000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":-9625000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":-9625000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-26612000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":-26612000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-33932000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":-32892000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":-83086000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":5150000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"IncreaseDecreaseInInterestPayableNet":{"label":"Increase (Decrease) in Interest Payable, Net","description":"The increase (decrease) during the reporting period in interest payable, which represents the amount owed to note holders, bond holders, and other parties for interest earned on loans or credit extended to the reporting entity.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":-351000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":-25000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":1387000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":1387000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":-3462000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-3462000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":6694000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":7237000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":7237000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":6394000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":6394000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":6394000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":7265000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":7265000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":7265000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-785000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":-785000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-250000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":-250000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":-787000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":-787000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":1449000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":1449000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":1449000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":1449000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-594000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":-594000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":4863000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":4863000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":-443000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":-443000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":8903000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":8903000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":8903000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":8903000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":-8303000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":-8303000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":-8303000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":76000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":76000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":76000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-09-30","val":-8257000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":-8257000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":199000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":199000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":199000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":199000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-8421000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":-8421000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":-8421000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-56000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":-56000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":-56000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":-8575000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":-8575000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":-172000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":-172000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":-8320000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":-8320000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":108000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":-7606000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":9730000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-15000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":-354000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":-90000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":-86000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":385000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":192000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":192000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":491000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":491000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":198000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":198000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":-593000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":-593000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-100000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":-100000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-180000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":-180000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":-356000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":-356000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":-116000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":-116000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-211000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":-211000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-140000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":-140000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":-505000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":-505000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":-414000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":-414000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":69000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":69000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":-28000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":-28000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":-137000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":-137000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":-286000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":-286000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":-286000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":165000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":165000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":723000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":723000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":1688000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":1688000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":1969000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":1969000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-441000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":-441000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":89000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":311000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":7003000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-1343000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"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":"2017-01-01","end":"2017-12-31","val":-26000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":222000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":222000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2019"}]}},"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":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-09-30","val":18345000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":18345000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":25994000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":25994000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2017-01-01","end":"2017-03-31","val":15000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":15000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-09-30","val":222000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":222000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"}]}},"IncrementalCommonSharesAttributableToContingentlyIssuableShares":{"label":"Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares","description":"Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of contingently issuable shares. Contingently issuable shares are those shares that are issuable for little or no cash contingent on certain conditions being met.","units":{"shares":[{"start":"2012-01-01","end":"2012-03-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2013-01-01","end":"2013-03-31","val":122000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":122000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":122000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":87000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":87000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":87000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":51000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":51000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":51000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":67000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":67000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":27000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":27000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2014-01-01","end":"2014-03-31","val":70000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":70000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":70000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":64000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":64000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":64000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":57000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":57000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":57000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":62000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":62000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":59000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":59000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":0,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":0,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":76000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":73000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":59000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":53000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":13000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":6000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":18000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":18000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":17000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":17000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":16000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":16000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":99000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":99000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":103000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":103000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":94000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":94000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":80000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":80000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":59000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":59000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":34000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":34000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":37000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":37000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":18000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":18000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":25000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":25000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":265000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":265000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":269000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":117000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":0,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1"}]}},"IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends":{"label":"Incremental Common Shares Attributable to Dilutive Effect of Nonvested Shares with Forfeitable Dividends","description":"Number of additional shares included in diluted EPS for potentially dilutive effect of nonvested equity-based payment award containing forfeitable rights to dividends or dividend equivalents, whether paid or unpaid.","units":{"shares":[{"start":"2011-01-01","end":"2011-12-31","val":267000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":267000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-06-30","val":207000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":157000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":213000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":268000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":244000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":244000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":244000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":280000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":280000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":242000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":242000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":242000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":192000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":192000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":192000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":249000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":249000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":288000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":288000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":420000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":420000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":420000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":424000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":424000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":424000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":429000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":429000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":429000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":469000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":469000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":564000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":564000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":0,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":0,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2"}]}},"IncrementalCommonSharesAttributableToShareBasedPaymentArrangements":{"label":"Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements","description":"Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.","units":{"shares":[{"start":"2010-01-01","end":"2010-06-30","val":230000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":258000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":203000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":178000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":224000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":224000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":319000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":219000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":219000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":229000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":229000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":254000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":254000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":208000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":208000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":235000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":235000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":235000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":235000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":200000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":200000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":158000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":158000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":92000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":92000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":133000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":133000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":70000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":70000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":90000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":90000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":90000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":90000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":34000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":34000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":34000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":2000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":2000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":2000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":0,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":0,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":285000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021"}]}},"InterestCostsCapitalized":{"label":"Interest Costs Capitalized","description":"Amount of interest capitalized during the period.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":6100000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":3700000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":1900000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":5500000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":1900000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":7400000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":7400000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":1900000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":3700000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":3700000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":1900000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":1900000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":5700000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":5700000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":2000000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":2000000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":7700000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":7700000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":7700000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":7700000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":2000000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":2000000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":4000000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":4000000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":2000000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":2000000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":6000000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":6000000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":2000000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":2000000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":7900000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":7900000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":7900000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":7900000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":1900000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":1900000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":1900000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":3800000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":3800000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":3800000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":1900000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":1900000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":1900000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":5600000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":5600000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":1800000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":1800000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":7200000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":7200000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":7200000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":7200000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":1300000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":1300000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":1300000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":2500000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":2500000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":2500000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":1200000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":1200000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":1200000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":3700000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":3700000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":1200000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":1200000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":5000000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":5000000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":1200000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":1200000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":2400000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":1200000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":3600000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":1200000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":4900000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-06-30","val":400000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":200000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":500000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":200000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2018-01-01","end":"2018-03-31","val":400000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":700000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":700000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":300000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":300000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":900000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":900000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":200000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":200000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2019-01-01","end":"2019-03-31","val":100000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":100000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":200000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":200000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":100000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":100000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":200000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":200000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3"}]}},"InterestExpense":{"label":"Interest Expense","description":"Amount of the cost of borrowed funds accounted for as interest expense.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":31079000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":15280000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":7813000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":22616000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":22616000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":7336000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":7336000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":30663000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":30663000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":8326000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":16540000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":16540000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":8214000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":8214000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":24804000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":24804000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":24804000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":8264000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":8264000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":8264000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":33437000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":33437000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":33437000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":8388000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":8388000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":17010000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":17010000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":8622000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":8622000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":25449000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":25449000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":8439000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":8439000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":35566000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":35566000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":35566000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":35566000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":13465000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":13465000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":26784000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":26784000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":13319000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":13319000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":40546000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":40546000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":13762000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":13762000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":57303000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":57303000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":57303000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":57303000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":16802000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":16802000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":16802000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":33802000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":33802000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":33802000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":17000000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":17000000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":17000000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":51297000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":51297000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":17495000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":17495000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":69382000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":69382000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":69382000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":69382000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":18449000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":18449000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":18449000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":37098000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":37098000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":37098000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":18649000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":18649000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":18649000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":55295000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":55295000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":18197000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":18197000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":73207000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":73207000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":18228000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":18228000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":36969000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":18741000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":56407000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":19438000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":75870000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":8066000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":3607000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":8249000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":4642000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":11117000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":2868000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":15070000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":5890000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":5890000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":12474000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":12474000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":6585000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":6585000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":19686000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":19686000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":7212000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":7212000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":27666000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":27666000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":8759000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":8759000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":18065000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":18065000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":9306000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":9306000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":27500000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":27500000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":9435000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":9435000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":36561000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":36561000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":8407000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":8407000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":16433000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":16433000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":8026000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":8026000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":23876000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":23876000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":7444000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":7444000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":31228000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":31228000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":7019000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":7019000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":14454000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":14454000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":7436000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":7436000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":21888000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":21888000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":7433000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":7433000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":29129000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":29129000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":29129000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":6557000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":6557000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":14459000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":14459000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":7902000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":7902000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":26632000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":26632000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":12173000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":12173000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":41948000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":41948000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":16745000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":16745000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":34935000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":18190000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":54746000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":19811000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":80119000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":36017000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"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":"2008-01-01","end":"2008-12-31","val":30283000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":14579000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":20190000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":20190000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":32885000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":32885000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":1340000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":8725000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":8725000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":17521000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":17521000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":17521000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":24622000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":24622000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":24622000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":8741000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":8741000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":16171000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":16171000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":24693000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":24693000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":32078000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":32078000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":32078000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":32078000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":13415000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":13415000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":20698000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":20698000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":39175000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":39175000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":46911000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":46911000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":46911000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":46911000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":24626000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":24626000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":24626000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":32708000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":32708000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":32708000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-09-30","val":57990000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":57990000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":67070000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":67070000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":67070000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":67070000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":26310000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":26310000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":26310000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":36031000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":36031000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":36031000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":61983000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":61983000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":70933000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":70933000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":25979000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":25979000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":35488000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":62012000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":63132000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":4793000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":2959000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":8847000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":11390000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":10428000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":5170000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":5170000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":10926000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":10926000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":17620000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":17620000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":24794000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":24794000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":8303000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":8303000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":17128000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":17128000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":26172000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":26172000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":34408000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":34408000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":8048000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":8048000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":15006000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":15006000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":22290000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":22290000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":28929000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":28929000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":6424000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":6424000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":13282000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":13282000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":20277000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":20277000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":27221000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":27221000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":27221000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":5816000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":5816000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":12228000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":12228000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":22701000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":22701000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":36994000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":36994000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":16434000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":16434000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":33340000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":52170000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":68116000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":34072000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"InterestPayableCurrent":{"label":"Interest Payable, Current","description":"Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).","units":{"USD":[{"end":"2009-12-31","val":3745000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":3745000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":3745000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":3745000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":10982000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":10139000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":10139000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":11010000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":11010000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":11010000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":11010000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":11010000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":10225000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":10760000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":10223000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":12459000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":12459000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":12459000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":12459000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":12459000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":11865000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":17322000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":12016000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":21362000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":21362000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":21362000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":21362000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":21362000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":21362000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":13059000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":21438000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":13105000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":21561000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":21561000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":21561000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":21561000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":21561000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":21561000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":21561000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":21561000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":13140000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":13140000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":21505000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":21505000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":12986000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":21389000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":21389000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":21389000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":21389000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":21389000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":13069000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":21497000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":13783000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":490000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":490000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":475000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":2106000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":2106000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":2106000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":2106000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":2298000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":2597000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":2304000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":1513000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":1513000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":1513000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":1513000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":1513000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":1413000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":1333000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":1157000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":1397000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":1397000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":1397000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":1397000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":1397000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":1186000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":1257000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":892000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":983000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":983000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":983000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":983000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":983000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":1052000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":955000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":846000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":697000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":697000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":697000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":697000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":697000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":862000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":1420000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":2385000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":2665000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":2665000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":2665000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":2665000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":2665000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":2225000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":2755000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":2976000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":9668000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":9668000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":8325000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"InventoryWriteDown":{"label":"Inventory Write-down","description":"Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels.","units":{"USD":[{"start":"2011-01-01","end":"2011-06-30","val":900000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":900000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":1600000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":1600000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":2100000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":2100000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-06-30","val":300000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":100000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":2100000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":2100000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"},{"start":"2015-04-01","end":"2015-06-30","val":2100000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-12-31","val":2000000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"start":"2015-01-01","end":"2015-12-31","val":2000000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28","frame":"CY2015"}]}},"InvestmentsFairValueDisclosure":{"label":"Investments, Fair Value Disclosure","description":"Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.","units":{"USD":[{"end":"2011-06-30","val":26000000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":100000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"}]}},"LeaseAndRentalExpense":{"label":"Operating Leases, Rent Expense","description":"Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":19300000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":19300000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":19900000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":19900000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":19900000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":20500000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":20500000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":20500000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":20500000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":21000000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":21000000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":16800000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2017-01-01","end":"2017-12-31","val":4200000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":4400000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":4400000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":5400000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":5400000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":5800000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":5800000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":7000000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021"}]}},"LeaseCost":{"label":"Lease, Cost","description":"Amount of lease cost recognized by lessee for lease contract.","units":{"USD":[{"start":"2019-01-01","end":"2019-03-31","val":1545000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":1545000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":3133000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":3133000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":1588000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":1588000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":5050000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":5050000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":1917000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":1917000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":6697000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":6697000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":1867000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":1867000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":4129000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":4129000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":2262000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":2262000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":5374000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":5374000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":1693000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":1693000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":7083000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":7083000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":1804000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":1804000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":3706000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":3706000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":1902000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":1902000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":5826000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":5826000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":2121000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":2121000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":8042000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":8042000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":2973000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":6300000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":3327000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":10363000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":4063000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":15333000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":15333000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":22521000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"LeaseOperatingExpense":{"label":"Oil and Gas Property, Lease Operating Expense (Deprecated 2018-01-31)","description":"Amount of lease operating expense related to property used in oil and gas production.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":104874000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":38626000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":18818000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":57139000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":57139000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":18513000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":18513000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":76740000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":76740000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":18648000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":38584000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":38584000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":19936000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":19936000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":59561000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":59561000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":59561000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":20977000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":20977000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":20977000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":81929000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":81929000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":81929000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":25384000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":25384000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":52090000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":52090000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":26706000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":26706000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":78296000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":78296000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":26206000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":26206000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":104791000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":104791000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":89069000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":89069000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":29213000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":24619000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":58696000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":49381000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":29483000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":24762000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":85330000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":71656000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":26634000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":22275000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":115470000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":97295000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":97835000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":97835000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":27424000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":27424000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":26884000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":54381000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":54381000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":53841000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":26957000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":26957000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":26957000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":77459000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":76919000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":23078000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":23078000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":101611000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":99731000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":99731000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":99731000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":25267000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":24967000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":24967000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":47199000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":48539000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":48539000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":21932000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":23572000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":23572000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":70606000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":70606000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":22067000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":22067000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":93214000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":93214000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":19034000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":19034000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":36198000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":17164000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":54188000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":17990000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":70188000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":12307000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":5773000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":10549000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":4776000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2018-01-01","end":"2018-03-31","val":4961000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":8721000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":3760000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2"}]}},"LesseeOperatingLeaseLiabilityPaymentsDue":{"label":"Lessee, Operating Lease, Liability, to be Paid","description":"Amount of lessee's undiscounted obligation for lease payment for operating lease.","units":{"USD":[{"end":"2019-03-31","val":2284000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":13366000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":11123000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":10009000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2019Q4I"},{"end":"2020-03-31","val":8405000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":8113000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":6486000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":4645000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020Q4I"},{"end":"2021-03-31","val":3615000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":17887000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":17224000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":17456000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021Q4I"},{"end":"2022-03-31","val":17489000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":18020000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":14811000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":13104000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2022Q4I"},{"end":"2023-03-31","val":11159000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":10247000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":10990000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":15639000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"},{"end":"2024-03-31","val":24141000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive":{"label":"Lessee, Operating Lease, Liability, to be Paid, after Year Five","description":"Amount of lessee's undiscounted obligation for lease payment for operating lease due 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":363000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":348000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":348000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":325000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2019Q4I"},{"end":"2020-03-31","val":312000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":312000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":310000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":287000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020Q4I"},{"end":"2021-03-31","val":271000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":856000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":1176000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":539000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021Q4I"},{"end":"2022-03-31","val":527000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":521000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":524000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":488000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2022Q4I"},{"end":"2023-03-31","val":478000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":472000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":475000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":2877000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"},{"end":"2024-03-31","val":2710000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFour":{"label":"Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Four","description":"Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fourth rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on a rolling approach, from latest statement of financial position date.","units":{"USD":[{"end":"2021-09-30","val":776000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2022-03-31","val":660000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":688000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":699000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2023-03-31","val":57000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":61000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":61000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2024-03-31","val":1402000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree":{"label":"Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Three","description":"Amount of lessee's undiscounted obligation for lease payments for operating lease, due in third rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on a rolling approach, from latest statement of financial position date.","units":{"USD":[{"end":"2021-09-30","val":776000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2022-03-31","val":781000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":823000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":839000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2023-03-31","val":827000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":955000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":1194000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2024-03-31","val":1997000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo":{"label":"Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Two","description":"Amount of lessee's undiscounted obligation for lease payments for operating lease, due in second rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on a rolling approach, from latest statement of financial position date.","units":{"USD":[{"end":"2021-09-30","val":5938000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2022-03-31","val":1302000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":1750000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":1600000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2023-03-31","val":1027000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":1422000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":2427000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2024-03-31","val":2968000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths":{"label":"Lessee, Operating Lease, Liability, Payments, Due Next Rolling Twelve Months","description":"Amount of lessee's undiscounted obligation for lease payments for operating lease, due in next rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on a rolling approach, from latest statement of financial position date.","units":{"USD":[{"end":"2021-09-30","val":6767000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2022-03-31","val":7578000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":9082000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":8675000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2023-03-31","val":2028000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":2607000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":4166000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2024-03-31","val":7987000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"LesseeOperatingLeaseLiabilityPaymentsDueYearFive":{"label":"Lessee, Operating Lease, Liability, to be Paid, Year Five","description":"Amount of lessee's undiscounted obligation for lease payment for operating 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":"2019-03-31","val":38000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":40000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":40000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":38000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2019Q4I"},{"end":"2020-03-31","val":40000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":40000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":40000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":39000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020Q4I"},{"end":"2021-03-31","val":41000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":742000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-12-31","val":689000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021Q4I"},{"end":"2022-12-31","val":51000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2022Q4I"},{"end":"2023-12-31","val":1348000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"}]}},"LesseeOperatingLeaseLiabilityPaymentsDueYearFour":{"label":"Lessee, Operating Lease, Liability, to be Paid, Year Four","description":"Amount of lessee's undiscounted obligation for lease payment for operating 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":"2019-03-31","val":36000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":40000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":70000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":60000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2019Q4I"},{"end":"2020-03-31","val":90000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":93000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":169000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":38000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020Q4I"},{"end":"2021-03-31","val":41000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":742000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-12-31","val":803000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021Q4I"},{"end":"2022-12-31","val":779000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2022Q4I"},{"end":"2023-12-31","val":1367000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"}]}},"LesseeOperatingLeaseLiabilityPaymentsDueYearThree":{"label":"Lessee, Operating Lease, Liability, to be Paid, Year Three","description":"Amount of lessee's undiscounted obligation for lease payment for operating 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":"2019-03-31","val":358000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":2344000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":2181000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":118000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2019Q4I"},{"end":"2020-03-31","val":194000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":419000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":559000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":166000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020Q4I"},{"end":"2021-03-31","val":213000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":5642000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-12-31","val":1200000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021Q4I"},{"end":"2022-12-31","val":934000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2022Q4I"},{"end":"2023-12-31","val":1891000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"}]}},"LesseeOperatingLeaseLiabilityPaymentsDueYearTwo":{"label":"Lessee, Operating Lease, Liability, to be Paid, Year Two","description":"Amount of lessee's undiscounted obligation for lease payment for operating 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":"2019-03-31","val":841000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":7091000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":6784000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":2436000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2019Q4I"},{"end":"2020-03-31","val":2577000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":3676000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":3636000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":542000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020Q4I"},{"end":"2021-03-31","val":948000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":6443000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-12-31","val":6468000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021Q4I"},{"end":"2022-12-31","val":1913000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2022Q4I"},{"end":"2023-12-31","val":3296000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"}]}},"LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear":{"label":"Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year","description":"Amount of lessee's undiscounted obligation for lease payment for operating lease having initial or remaining lease term in excess of one year to be paid in remainder of current fiscal year.","units":{"USD":[{"end":"2019-03-31","val":648000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":3503000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":1700000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":7032000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2019Q4I"},{"end":"2020-03-31","val":5192000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":3573000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":1772000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":3573000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020Q4I"},{"end":"2021-03-31","val":2101000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":3462000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":1791000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2022-03-31","val":6641000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":5156000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":2474000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2023-03-31","val":6742000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":4730000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":2667000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2024-03-31","val":7077000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"LesseeOperatingLeaseLiabilityUndiscountedExcessAmount":{"label":"Lessee, Operating Lease, Liability, Undiscounted Excess Amount","description":"Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.","units":{"USD":[{"end":"2019-03-31","val":253000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-09-30","val":583000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":489000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2019Q4I"},{"end":"2020-03-31","val":386000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":363000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":287000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":221000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020Q4I"},{"end":"2021-03-31","val":197000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":1188000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":1209000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":1144000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021Q4I"},{"end":"2022-03-31","val":1064000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":1044000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":853000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":776000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2022Q4I"},{"end":"2023-03-31","val":691000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":710000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":879000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":2739000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"},{"end":"2024-03-31","val":3421000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"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":"2009-12-31","val":1434765000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":1434765000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":1434765000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":1434765000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":1513845000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":1546923000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":1546923000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":1746375000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":1743916000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":1743916000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":1743916000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":1743916000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":1773261000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":1826399000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":1924468000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":2212469000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":2212469000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":2212469000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":2212469000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":2216437000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":2203625000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":2236021000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":2341487000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":2444061000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":2444061000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":2444061000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":2444061000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":2444061000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":2473463000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":2531199000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":2629918000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":2670755000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":2643593000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":2643593000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":2643593000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":2698505000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":2698505000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":2698505000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":2698505000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":2698505000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":2681273000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":2734902000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":2724536000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":2777593000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":2675159000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":2173347000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":2173347000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":2173347000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":2173347000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":2173347000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":1630355000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":1347028000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":1024278000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":524998000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":524998000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":433274000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":551270000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":551270000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":551270000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":551270000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":534395000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":596996000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":680224000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":777520000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":777520000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":777520000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":777520000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":777520000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":822797000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":921188000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":941346000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":959816000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":959816000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":959816000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":959816000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":959816000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":949209000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":598034000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":590679000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":583135000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":583135000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":583135000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":583135000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":583135000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":600450000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":622943000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":698335000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":819454000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":819454000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":819454000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":819454000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":819454000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":831790000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":1452355000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":1589913000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":1716362000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":1716362000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":1716362000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":1716362000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":1716362000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":1784932000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":1840470000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":1930449000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":2734462000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":2734462000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":2695163000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"LiabilitiesCurrent":{"label":"Liabilities, Current","description":"Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer.","units":{"USD":[{"end":"2009-12-31","val":103604000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":103604000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":103604000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":103604000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":126741000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":138654000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":138654000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":162787000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":156735000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":156735000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":156735000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":156735000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":154342000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":142541000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":187577000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":211794000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":211794000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":211794000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":211794000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":215762000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":192677000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":212257000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":196531000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":177480000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":177480000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":177480000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":177480000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":177480000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":179412000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":179867000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":223282000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":160767000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":177076000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":177076000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":177076000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":176033000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":176033000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":176033000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":176033000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":176033000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":164025000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":162385000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":187007000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":187007000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":175066000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":148919000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":148919000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":148919000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":148919000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":148919000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":110286000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":93793000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":94997000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":333053000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":333053000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":417121000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":75497000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":75497000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":75497000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":75497000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":73411000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":102463000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":132938000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":106012000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":106012000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":106012000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":106012000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":106012000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":97532000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":83615000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":67030000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":81146000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":81146000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":81146000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":81146000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":81146000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":66041000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":38629000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":52360000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":58040000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":58040000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":58040000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":58040000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":58040000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":75165000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":101924000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":177726000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":121337000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":121337000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":121337000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":121337000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":121337000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":221569000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":273060000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":286217000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":195839000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":195839000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":195839000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":195839000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":195839000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":136446000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":141085000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":194852000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":248444000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":248444000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":353475000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"LiabilitiesFairValueDisclosure":{"label":"Financial and Nonfinancial Liabilities, Fair Value Disclosure","description":"Fair value of financial and nonfinancial obligations.","units":{"USD":[{"end":"2013-12-31","val":200000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":200000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013Q4I"},{"end":"2014-03-31","val":700000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":700000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":1300000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":1300000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":100000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2015-03-31","val":100000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"}]}},"LiabilitiesNoncurrent":{"label":"Liabilities, Noncurrent","description":"Amount of obligation due after one year or beyond the normal operating cycle, if longer.","units":{"USD":[{"end":"2010-12-31","val":707164000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2010-12-31","val":707164000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":707164000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2011-06-30","val":733659000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":765398000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":1004166000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q4I"},{"end":"2011-12-31","val":1004166000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2012-03-31","val":1005305000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"}]}},"LiabilitiesSubjectToCompromise":{"label":"Liabilities Subject to Compromise","description":"Total amount of liabilities subject to compromise.","units":{"USD":[{"end":"2014-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-12-31","val":984388000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":984388000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":917972000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"}]}},"LiabilitiesSubjectToCompromiseAccountsPayableAndAccruedLiabilities":{"label":"Liabilities Subject to Compromise, Accounts Payable and Accrued Liabilities","description":"The amount of trade accounts payable included in liabilities subject to compromise.","units":{"USD":[{"end":"2015-12-31","val":55587000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":55587000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":2607000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"}]}},"LiabilitiesSubjectToCompromiseDebtAndAccruedInterest":{"label":"Liabilities Subject to Compromise, Debt and Accrued Interest","description":"The amount of debt and related accrued interest included in liabilities subject to compromise.","units":{"USD":[{"end":"2015-12-31","val":905629000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":905629000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":905629000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2016-04-22","val":905629000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":905629000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":906000000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":905629000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":905629000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":905629000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":906000000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01"}]}},"LiabilitiesSubjectToCompromiseOtherLiabilities":{"label":"Liabilities Subject to Compromise, Other Liabilities","description":"The amount of other obligations included in liabilities subject to compromise.","units":{"USD":[{"end":"2015-12-31","val":3958000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":3958000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":6244000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"}]}},"LiabilityForUncertainTaxPositionsNoncurrent":{"label":"Liability for Uncertainty in Income Taxes, Noncurrent","description":"Amount recognized for uncertainty in income taxes classified as noncurrent.","units":{"USD":[{"end":"2012-12-31","val":1000000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012Q4I"}]}},"LineOfCreditFacilityAmountOutstanding":{"label":"Line of Credit Facility, Amount Outstanding (Deprecated 2014-01-31)","description":"Amount borrowed under the credit facility as of the balance sheet date.","units":{"USD":[{"end":"2010-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2010-12-31","val":0,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":0,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2011-06-30","val":0,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":0,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q4I"},{"end":"2011-12-31","val":0,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2012-03-31","val":0,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"}]}},"LineOfCreditFacilityCommitmentFeeAmount":{"label":"Line of Credit Facility, Commitment Fee Amount","description":"Amount of the fee for available but unused credit capacity under the credit facility.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":700000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":700000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":300000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":1000000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":400000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":1400000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":400000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":700000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":400000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":1100000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":400000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":1500000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":400000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2017-01-01","end":"2017-06-30","val":200000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":100000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":400000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":100000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2018-01-01","end":"2018-06-30","val":600000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":300000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":900000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":300000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3"}]}},"LineOfCreditFacilityCommitmentFeePercentage":{"label":"Line of Credit Facility, Commitment Fee Percentage","description":"The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.","units":{"pure":[{"start":"2011-01-01","end":"2011-09-30","val":0.005,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":0.005,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":0.005,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2013-01-01","end":"2013-03-31","val":0.0375,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-04-01","end":"2013-06-30","val":0.0038,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2"},{"start":"2013-07-01","end":"2013-09-30","val":0.005,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":0.005,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0.005,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0.005,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":0.005,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-04-01","end":"2014-06-30","val":0.005,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":0.005,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2"}]}},"LineOfCreditFacilityCurrentBorrowingCapacity":{"label":"Line of Credit Facility, Current Borrowing Capacity","description":"Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.","units":{"USD":[{"end":"2012-03-31","val":325000000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2013-04-26","val":450000000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2013-04-26","val":450000000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q1I"},{"end":"2013-10-28","val":450000000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2013-10-28","val":450000000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-10-28","val":450000000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013Q3I"},{"end":"2014-03-31","val":450000000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":450000000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":450000000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":450000000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":417600000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-10-27","val":417600000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"}]}},"LineOfCreditFacilityMaximumBorrowingCapacity":{"label":"Line of Credit Facility, Maximum Borrowing Capacity","description":"Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.","units":{"USD":[{"end":"2011-05-31","val":500000000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2011-05-31","val":500000000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2011-05-31","val":500000000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-05-31","val":500000000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q2I"},{"end":"2013-04-26","val":500000000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2013-04-26","val":500000000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q1I"},{"end":"2013-10-28","val":500000000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2013-10-28","val":500000000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-10-28","val":500000000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013Q3I"},{"end":"2014-03-31","val":500000000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":500000000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":500000000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":500000000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":500000000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-10-27","val":500000000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"}]}},"LongTermDebt":{"label":"Long-term Debt","description":"Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.","units":{"USD":[{"end":"2015-12-31","val":324900000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":324900000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":339900000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2022-12-31","val":688531000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-12-31","val":1201891000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":1201891000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":1076969000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"LongTermDebtCurrent":{"label":"Long-term Debt, Current Maturities","description":"Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.","units":{"USD":[{"end":"2016-03-31","val":339900000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2022-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-12-31","val":28125000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":28125000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":37500000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"LongTermDebtFairValue":{"label":"Long-term Debt, Fair Value","description":"The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.","units":{"USD":[{"end":"2016-04-22","val":253000000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":253000000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":253000000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":253000000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":253000000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":253000000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":253000000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"LongTermDebtNoncurrent":{"label":"Long-term Debt, Excluding Current Maturities","description":"Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.","units":{"USD":[{"end":"2009-12-31","val":471397000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":471397000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":471397000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":471397000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":471508000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":471566000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":471566000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":471624000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":471624000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":471624000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":471624000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":471624000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":471685000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":471746000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":471809000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":719775000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":719775000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":719775000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":719775000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":719775000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":719875000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":719977000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":822721000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":916934000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":916934000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":916934000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":916934000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":916934000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":916934000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":987168000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":1037435000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":1120402000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":1142368000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":1142368000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":1142368000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":1142368000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":1142368000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":1142368000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":1142368000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":1142368000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":1175036000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":1175036000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":1178301000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":1178301000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":1079269000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":1074534000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":1074534000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":1074534000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":1074534000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":1074534000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":1124201000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":1149165000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":1179132000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":265325000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":265325000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":265325000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":265325000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":245371000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":274577000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":316773000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":387988000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":387988000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":387988000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":387988000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":387988000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":424207000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":466433000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":475663000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":472900000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":472900000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":472900000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":472900000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":472900000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":484142000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":464390000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":447644000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":424905000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":424905000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":424905000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":424905000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":424905000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":395172000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":393446000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":393726000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":372825000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":372825000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":372825000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":372825000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":372825000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":346003000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":640175000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":626351000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":688531000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":688531000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":688531000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":688531000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":688531000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":705715000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":722904000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":645096000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":1173766000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":1173766000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":1039469000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"LossesGainsOnSalesOfAssetsAndAssetImpairmentCharges":{"label":"Losses (Gains) on Sales of Assets and Asset Impairment Charges (Deprecated 2012-01-31)","description":"The aggregate impact on earnings in the period of (a) the loss (gain) from the difference between the sale price or salvage price and the book value of an asset that was sold or retired during the reporting period, and (b) the charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.","units":{"USD":[{"start":"2009-01-01","end":"2009-03-31","val":79300000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009Q1"}]}},"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":"2008-01-01","end":"2008-12-31","val":743000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":47461000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":8976000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":8976000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":-8307000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-8307000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":-345000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":12000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":12000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":-3427000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":-3427000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":-3427000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":137458000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":137458000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":137458000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-1520000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":-1520000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-1299000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":-1299000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":-1217000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":-1217000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":242321000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":242321000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":242321000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":242321000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-1307000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":-1307000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-1235000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":-1235000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":101458000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":101458000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":191095000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":191095000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":191095000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":191095000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":69837000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":69837000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":69837000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":120113000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":120113000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":120113000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-09-30","val":203052000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":203052000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":225037000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":225037000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":225037000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":225037000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":32669000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":32669000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":32669000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":35928000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":35928000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":35928000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":-63130000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":-63130000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":-67941000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":-67941000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":49848000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":49848000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":74281000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":104281000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":125304000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":14996000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":13114000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":47553000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":86489000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":101371000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":-19899000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":-19899000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":8973000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":8973000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":50961000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":50961000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":121689000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":121689000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":35740000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":35740000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":77682000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":77682000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":86677000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":86677000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":83588000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":83588000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":10917000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":10917000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-9086000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":-9086000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":-26090000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":-26090000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":-49121000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":-49121000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":-30488000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":-30488000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":-35003000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":-35003000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":-22256000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":-22256000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":-30267000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":-30267000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":-30267000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-29579000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":-29579000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":256867000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":256867000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":242407000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":242407000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":304300000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":304300000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":14055000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":14055000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":30934000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":50051000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":586341000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-126534000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"NetCashProvidedByUsedInFinancingActivitiesContinuingOperations":{"label":"Net Cash Provided by (Used in) Financing Activities, Continuing Operations","description":"Amount of cash inflow (outflow) of financing activities, excluding 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":"2008-01-01","end":"2008-12-31","val":743000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":47461000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":8976000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":8976000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":-8307000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-8307000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":-345000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":12000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":12000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":-3427000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":-3427000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":-3427000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":137458000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":137458000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":137458000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-1520000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":-1520000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-1299000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":-1299000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":-1217000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":-1217000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":242321000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":242321000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":242321000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":242321000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-1307000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-1235000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":101458000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":191095000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":191095000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":191095000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":225037000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":225037000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"}]}},"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":"2008-01-01","end":"2008-12-31","val":-594149000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":-130749000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":-154915000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":-154915000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":-179287000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-179287000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":-58334000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":-124019000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":-124019000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":-223246000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":-223246000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":-223246000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":-348515000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":-348515000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":-348515000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-126898000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":-126898000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-239747000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":-239747000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":-357670000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":-357670000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":-450048000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":-450048000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":-450048000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":-450048000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-187383000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":-187383000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-374469000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":-374469000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":-575188000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":-575188000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":-757227000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":-757227000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":-757227000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":-757227000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":-131982000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":-131982000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":-131982000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-258476000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":-258476000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":-258476000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-09-30","val":-428732000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":-428732000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-533377000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":-533377000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-533377000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":-533377000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-105554000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":-105554000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":-105554000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":-208944000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":-208944000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":-208944000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":-183281000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":-183281000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":-241301000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":-241301000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":-49173000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":-49173000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-104051000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":-125775000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":-138524000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-31719000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":-24347000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":-85210000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":-140957000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":-201680000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":-12826000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":-12826000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-63215000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":-63215000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":-142469000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":-142469000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":-248823000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":-248823000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-87924000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":-87924000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-177074000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":-177074000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":-239357000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":-239357000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":-287868000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":-287868000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-52760000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":-52760000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-84662000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":-84662000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":-101828000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":-101828000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":-115331000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":-115331000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":-36057000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":-36057000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":-58286000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":-58286000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":-112522000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":-112522000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":-186456000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":-186456000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":-186456000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-34792000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":-34792000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-364189000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":-364189000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":-453782000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":-453782000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":-635870000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":-635870000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-112375000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":-112375000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-221712000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":-367548000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":-1025515000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-62674000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"NetCashProvidedByUsedInInvestingActivitiesContinuingOperations":{"label":"Net Cash Provided by (Used in) Investing Activities, Continuing Operations","description":"Amount of cash inflow (outflow) of investing activities, excluding 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":"2008-01-01","end":"2008-12-31","val":-674653000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":-135749000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":-159915000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":-159915000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":-184287000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-184287000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":-63334000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":-129019000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":-129019000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":-228246000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":-228246000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":-228246000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":-353515000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":-353515000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":-353515000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-131898000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":-131898000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-244747000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":-244747000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":-362670000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":-362670000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":-455048000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":-455048000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":-455048000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":-455048000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-187383000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-374469000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":-575188000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":-757227000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":-757227000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":-757227000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":-533377000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":-533377000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"}]}},"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":"2008-01-01","end":"2008-12-31","val":588066000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":83236000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":145810000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":145810000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":225780000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":225780000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":59311000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":129022000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":129022000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":193712000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":193712000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":193712000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":258955000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":258955000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":258955000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":61815000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":61815000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":186977000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":186977000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":288519000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":288519000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":373056000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":373056000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":373056000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":373056000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":63783000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":63783000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":155679000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":155679000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":223684000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":223684000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":314606000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":314606000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":314606000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":314606000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":62223000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":62223000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":62223000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":149531000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":149531000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":149531000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-09-30","val":225607000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":225607000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":311447000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":311447000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":311447000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":311447000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":69699000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":69699000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":69699000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":170303000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":170303000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":170303000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":252175000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":252175000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":306371000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":306371000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":-770000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":-770000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":29439000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":28410000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":42274000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":5045000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":11736000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":43966000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":67052000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":107838000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":25156000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":25156000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":53047000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":53047000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":88024000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":88024000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":121573000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":121573000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":50595000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":50595000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":100260000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":100260000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":153065000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":153065000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":203173000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":203173000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":76083000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":76083000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":99000000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":99000000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":127782000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":127782000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":165212000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":165212000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":67846000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":67846000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":93234000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":93234000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":133648000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":133648000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":215726000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":215726000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":215726000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":64895000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":64895000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":115609000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":115609000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":212178000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":212178000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":331241000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":331241000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":99695000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":99695000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":191088000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":318402000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":447111000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":189685000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"NetCashProvidedByUsedInOperatingActivitiesContinuingOperations":{"label":"Net Cash Provided by (Used in) Operating Activities, Continuing Operations","description":"Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":582027000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":83573000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":146176000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":146176000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":226176000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":226176000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":59265000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":129018000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":129018000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":193741000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":193741000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":193741000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":258996000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":258996000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":258996000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":61716000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":61716000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":186941000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":186941000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":288514000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":288514000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":373058000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":373058000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":373058000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":373058000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":63783000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":155679000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":223684000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":314606000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":314606000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":314606000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":62223000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":149531000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":311447000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":311447000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":69699000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":170303000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"}]}},"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":"2008-01-01","end":"2008-12-31","val":-260490000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":-61396000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":-2267000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":-53870000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":-53870000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":7526000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":7526000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":-39330000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-12-31","val":-39330000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-12-31","val":-39330000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":-39330000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-39330000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":14205000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":26664000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":26664000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":12459000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":12459000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":35994000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":35994000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":35994000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":9330000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":9330000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":9330000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":46294000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":46294000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2010-01-01","end":"2010-12-31","val":46294000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-12-31","val":46294000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":46294000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":46294000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":20181000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":20181000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":61209000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":61209000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":41028000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":41028000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":78185000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":78185000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":16976000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":16976000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":98821000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":98821000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2011-01-01","end":"2011-12-31","val":98821000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-12-31","val":98821000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":98821000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":20939000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2011-01-01","end":"2011-12-31","val":98821000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":96282000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":3570000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":3570000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":6598000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":6598000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":3028000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":3028000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":9720000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":9720000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":3122000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":3122000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":20939000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":20939000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-12-31","val":20939000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":20939000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":21701000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":21701000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":7209000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":7209000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":8038000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":13931000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":13931000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":15587000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":6722000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":6722000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":7549000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":22817000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":22946000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":8886000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":7359000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":-19032000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":-19032000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-12-31","val":-19032000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-12-31","val":-2442000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-2442000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-2442000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-2442000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-2442000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":-2442000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":5413000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":5442000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":5442000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":13451000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":12269000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":12269000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":8038000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":6827000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":6827000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":14743000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":14743000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":2474000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":2474000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-283427000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":-283427000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2014-01-01","end":"2014-12-31","val":-283427000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-12-31","val":-283427000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":-283427000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":-477077000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":-477077000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-769944000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":-292867000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":-1124532000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":-354588000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":-1653971000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"start":"2015-01-01","end":"2015-12-31","val":-1653971000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-108303000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":17710000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":33951000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":16241000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":46834000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":12884000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":71971000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2017-01-01","end":"2017-12-31","val":71971000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-12-31","val":71971000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":71971000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":8466000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":8466000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":8466000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-03-31","val":8466000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":10787000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":10787000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":2319000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":2319000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":2321000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":17867000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":17867000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":7080000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":7080000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":74615000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":74615000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":16053000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":16053000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-03-31","val":16053000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-03-31","val":16053000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2019-01-01","end":"2019-03-31","val":16053000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-03-31","val":16053000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":80757000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":80757000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":64704000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":64704000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-04-01","end":"2019-06-30","val":64704000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":64704000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":108408000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":108408000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":27651000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":27651000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":114656000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":114656000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-5858000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":-5858000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-03-31","val":-5858000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-03-31","val":-5858000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2020-01-01","end":"2020-03-31","val":-5858000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-03-31","val":-5858000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-311834000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":-311834000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":-305976000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":-305976000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-04-01","end":"2020-06-30","val":-305976000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":-305976000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":-318730000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":-318730000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":-6896000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":-6896000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-309382000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":-309382000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":28380000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":28380000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-03-31","val":28380000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-03-31","val":28380000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2021-01-01","end":"2021-03-31","val":28380000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-03-31","val":28380000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":8429000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":8429000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":-19951000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":-19951000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-04-01","end":"2021-06-30","val":-19951000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":-19951000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":-27514000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":-27514000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":-35943000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":-35943000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":86759000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":86759000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":86759000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-64255000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":-64255000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-03-31","val":-64255000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-03-31","val":-64255000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2022-01-01","end":"2022-03-31","val":-64255000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-03-31","val":-64255000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":24535000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":24535000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":88790000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":88790000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-04-01","end":"2022-06-30","val":88790000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":88790000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":167076000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":167076000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":142541000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":142541000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":340437000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":340437000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":94492000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":94492000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-03-31","val":94492000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-03-31","val":94492000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":119429000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":24937000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":24937000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":114658000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":-4771000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":297716000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-15528000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"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":"2011-01-01","end":"2011-12-31","val":84610000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":82071000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-06-30","val":6598000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":3028000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":9720000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":3122000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":20939000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":21701000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":21701000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":7209000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":8038000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":13931000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":13931000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":15587000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":6722000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":6722000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":7549000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":22817000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":22946000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":8886000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":7359000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":-19032000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":-2442000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-2442000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":-2442000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":5413000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":5442000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":5442000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":13451000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":12269000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":12269000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":8038000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":6827000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":6827000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":14743000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":14743000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":2474000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":2474000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":-283427000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":-283427000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":-477077000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":-477077000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-769944000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":-292867000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":-1124532000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":-354588000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":-1653971000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-108303000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":17710000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":33951000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":16241000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":46834000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":12884000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":71971000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":8466000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":8466000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":10787000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":10787000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":2319000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":2319000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":17867000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":17867000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":7080000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":7080000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":74615000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":74615000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":16053000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":16053000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":80757000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":80757000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":64704000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":64704000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":108408000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":108408000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":27651000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":27651000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":114656000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":114656000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-5858000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":-5858000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-311834000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":-311834000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":-305976000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":-305976000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":-318730000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":-318730000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":-6896000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":-6896000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-309382000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":-309382000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":28380000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":28380000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":8429000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":8429000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":-19951000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":-19951000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":-27514000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":-27514000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":-35943000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":-35943000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":86759000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":86759000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":86759000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-64255000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":-64255000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":24535000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":24535000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":88790000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":88790000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":167076000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":167076000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":142541000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":142541000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":340437000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":340437000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":94492000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":94492000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":119429000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":24937000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":114658000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":-4771000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":297716000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-15528000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnEquityOrNetAssets1":{"label":"New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets (Deprecated 2020-01-31)","description":"Amount of cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented.","units":{"USD":[{"end":"2007-01-01","val":1000000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2006Q4I"},{"end":"2007-01-01","val":1000000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"}]}},"NontradeReceivablesCurrent":{"label":"Nontrade Receivables, Current","description":"The sum of amounts currently receivable other than from customers. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer.","units":{"USD":[{"end":"2013-12-31","val":11600000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q4I"},{"end":"2014-09-30","val":7900000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":3100000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":3100000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":3100000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":3100000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":4800000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":3200000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":3400000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":1200000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":1200000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10"},{"end":"2015-12-31","val":1200000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2015-12-31","val":1200000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2015-12-31","val":1200000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28","frame":"CY2015Q4I"},{"end":"2016-03-31","val":1900000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2016-06-30","val":1500000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09","frame":"CY2016Q2I"},{"end":"2016-09-30","val":2100000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03","frame":"CY2016Q3I"},{"end":"2016-12-31","val":1600000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-12-31","val":1600000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-12-31","val":1600000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-12-31","val":1600000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-12-31","val":1600000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q4I"},{"end":"2017-03-31","val":1800000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08","frame":"CY2017Q1I"},{"end":"2017-06-30","val":1400000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09","frame":"CY2017Q2I"},{"end":"2017-09-30","val":1100000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07","frame":"CY2017Q3I"},{"end":"2017-12-31","val":2100000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01"},{"end":"2017-12-31","val":2100000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":2100000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":2100000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":2100000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":1100000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":800000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":900000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":2400000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":2400000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":2400000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":2400000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":2400000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":3500000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":4100000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":4300000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":5400000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":5400000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":5400000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":5400000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":5400000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":5900000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":6300000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":6400000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":2400000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":2400000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":2400000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":2400000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":2400000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":1800000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":1000000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":1200000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":1000000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":1000000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":1000000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":1000000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":1000000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2021-12-31","val":1000000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2021-12-31","val":1000000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021Q4I"},{"end":"2022-03-31","val":1000000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":1600000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":2600000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":4300000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":4300000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":4300000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":4300000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":4300000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2022-12-31","val":4300000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2022Q4I"},{"end":"2023-03-31","val":5700000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":7600000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":9100000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":7200000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":7200000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":2800000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"OilAndGasJointInterestBillingReceivables":{"label":"Oil and Gas Joint Interest Billing Receivables","description":"Portion of accounts receivable attributable to joint interest partners in oil and gas properties. These are billings to the non-operators associated with the operation of wells and are based on those owners' working interests in the wells.","units":{"USD":[{"end":"2012-12-31","val":3600000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":3600000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":3600000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-09-30","val":3100000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":1600000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":1600000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":1600000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":1600000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":1600000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":1600000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":1600000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":1600000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":1200000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":1200000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":1100000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":1100000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":1900000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":8400000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":8400000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":8400000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":8400000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":8400000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":17400000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":7500000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":9600000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":4900000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":4900000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10"},{"end":"2015-12-31","val":4900000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2015-12-31","val":4900000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2015-12-31","val":4900000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28","frame":"CY2015Q4I"},{"end":"2016-03-31","val":2900000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2016-06-30","val":4500000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09","frame":"CY2016Q2I"},{"end":"2016-09-30","val":2600000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03","frame":"CY2016Q3I"},{"end":"2016-12-31","val":2700000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-12-31","val":2700000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-12-31","val":2700000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-12-31","val":2700000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-12-31","val":2700000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q4I"},{"end":"2017-03-31","val":4600000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08","frame":"CY2017Q1I"},{"end":"2017-06-30","val":700000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09","frame":"CY2017Q2I"},{"end":"2017-09-30","val":3500000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07","frame":"CY2017Q3I"},{"end":"2017-12-31","val":2100000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01"},{"end":"2017-12-31","val":2100000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":2100000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":2100000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":2100000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":2700000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":1100000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":3300000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":5600000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":5600000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":5600000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":5600000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":5600000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":4500000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":800000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":1400000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":3700000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":3700000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":3700000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":3700000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":3700000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":3000000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":400000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":500000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":4000000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":4000000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":4000000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":4000000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":4000000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":1100000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":600000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":800000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":1900000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":1900000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":1900000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":1900000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":1900000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2021-12-31","val":1900000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2021-12-31","val":1900000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021Q4I"},{"end":"2022-03-31","val":1600000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":1600000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":2800000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":5600000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":5600000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":5600000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":5600000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":5600000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2022-12-31","val":5600000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2022Q4I"},{"end":"2023-03-31","val":1200000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":1400000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":1900000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":7000000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":7000000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":14700000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"OilAndGasPropertyFullCostMethodNet":{"label":"Oil and Gas Property, Full Cost Method, Net","description":"Oil and gas properties, net of depletion, carried under the full cost method.","units":{"USD":[{"end":"2012-12-31","val":2345020000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":2367954000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-12-31","val":2539646000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":2588817000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":2588817000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":2625067000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":2661785000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-12-31","val":2095037000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":2095037000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-12-31","val":457903000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2017-12-31","val":495397000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-12-31","val":701296000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":701296000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-12-31","val":866989000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":866989000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-12-31","val":542094000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020Q4I"}]}},"OilAndGasSalesRevenue":{"label":"Oil and Gas Sales Revenue (Deprecated 2018-01-31)","description":"Revenue from the sale of oil and gas during the period.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":793859000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":159201000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":82783000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":257153000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":257153000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":97952000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":97952000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":371749000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":371749000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":110025000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":215076000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":215076000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":105051000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":105051000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":320887000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":320887000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":320887000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":105811000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":105811000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":105811000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":436632000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":436632000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":436632000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":144201000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":144201000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":303414000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":303414000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":159213000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":159213000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":446537000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":446537000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":143123000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":143123000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":602341000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":602341000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":602341000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":601019000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":136142000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":136142000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":268122000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":268122000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":131980000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":131980000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":396068000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":396068000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":127946000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":127946000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":554194000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":554194000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":558390000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":558390000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":146477000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":146477000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":146531000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":287369000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":287369000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":289034000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":140892000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":140892000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":142503000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":442418000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":442015000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":155049000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":152981000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":588541000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":585229000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":585229000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":585229000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":148558000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":149057000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":149057000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":306772000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":307544000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":307544000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":158214000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":158487000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":158487000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":441440000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":441440000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":133896000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":133896000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":547790000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":547790000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":67358000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":67358000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":135639000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":68281000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":195663000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":60024000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":246270000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":34367000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":42412000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":88194000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":45782000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2018-01-01","end":"2018-03-31","val":52752000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":104099000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":51347000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2"}]}},"OperatingExpenses":{"label":"Operating 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. Includes selling, general and administrative expense.","units":{"USD":[{"start":"2017-01-01","end":"2017-03-31","val":31889000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":61921000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":30032000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":93597000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":31676000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":128728000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":31883000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":31883000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":62700000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":62700000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":30817000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":30817000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":99848000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":99848000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":37148000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":37148000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":143909000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":143909000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":43063000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":43063000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":89389000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":89389000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":46325000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":46325000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":136822000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":136822000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":47432000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":47432000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":183328000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":183328000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":140463000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":140463000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":432380000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":432380000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":291917000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":291917000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":465102000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":465102000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":32723000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":32723000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":496005000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":496005000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":33082000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":33082000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":69402000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":69402000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":36321000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":36321000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":109011000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":109011000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":39610000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":39610000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":161906000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":161906000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":161906000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":49927000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":49927000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":109059000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":109059000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":59131000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":59131000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":195297000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":195297000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":86238000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":86238000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":287645000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":287645000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":94130000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":94130000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":190074000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":95944000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":295420000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":105345000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":432416000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":185056000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"OperatingIncomeLoss":{"label":"Operating Income (Loss)","description":"The net result for the period of deducting operating expenses from operating revenues.","units":{"USD":[{"start":"2017-01-01","end":"2017-03-31","val":10523000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":26273000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":15750000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":43619000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":17343000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":67182000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":20869000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":20869000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":41399000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":41399000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":20530000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":20530000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":69286000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":69286000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":27886000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":27886000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":113377000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":113377000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":29001000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":29001000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":57379000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":57379000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":28378000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":28378000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":81959000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":81959000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":24582000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":24582000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":105303000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":105303000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-87086000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":-87086000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-354158000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":-354158000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":-267071000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":-267071000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":-341181000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":-341181000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":12976000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":12976000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":-318619000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":-318619000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":53659000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":53659000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":87200000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":87200000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":33540000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":33540000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":146839000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":146839000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":59639000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":59639000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":245294000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":245294000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":245294000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":79729000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":79729000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":203202000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":203202000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":123474000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":123474000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":359145000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":359145000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":155943000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":155943000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":465775000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":465775000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":45824000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":45824000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":76280000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":30456000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":144897000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":68618000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":219942000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":71624000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"OperatingLeaseExpense":{"label":"Operating Lease, Expense","description":"Amount of operating lease expense. Excludes sublease income.","units":{"USD":[{"start":"2017-01-01","end":"2017-09-30","val":16380000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":5831000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":21908000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-09-30","val":12927000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":4207000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":17643000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":17643000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":20763000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":20763000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":21360000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":21360000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":27206000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":27206000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":55329000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2022"}]}},"OperatingLeaseLiability":{"label":"Operating Lease, Liability","description":"Present value of lessee's discounted obligation for lease payments from operating lease.","units":{"USD":[{"end":"2019-03-31","val":2031000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":13366000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":10540000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":9520000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2019Q4I"},{"end":"2020-03-31","val":8019000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":7750000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":6199000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":4424000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020Q4I"},{"end":"2021-03-31","val":3418000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":16699000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":16015000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":16312000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021Q4I"},{"end":"2022-03-31","val":16425000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":16976000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":13958000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":12328000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2022Q4I"},{"end":"2023-03-31","val":10468000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":9537000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":10111000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":12900000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"},{"end":"2024-03-31","val":20720000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"OperatingLeaseLiabilityCurrent":{"label":"Operating Lease, Liability, Current","description":"Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.","units":{"USD":[{"end":"2020-12-31","val":3473000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":3473000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-09-30","val":6292000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":7222000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":7222000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":7222000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":7222000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":7222000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":7998000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":9188000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":8579000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":8553000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":8553000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":8553000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":8553000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":8553000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":7165000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":5966000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":5507000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":4001000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":4001000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":7765000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"OperatingLeaseLiabilityNoncurrent":{"label":"Operating Lease, Liability, Noncurrent","description":"Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.","units":{"USD":[{"end":"2020-12-31","val":951000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":951000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-09-30","val":9723000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":9090000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":9090000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":9090000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":9090000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":9090000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":8427000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":7788000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":5379000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":3775000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":3775000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":3775000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":3775000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":3775000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":3303000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":3571000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":4604000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":8899000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":8899000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":12955000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"OperatingLeasePayments":{"label":"Operating Lease, Payments","description":"Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.","units":{"USD":[{"start":"2019-01-01","end":"2019-03-31","val":203000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":1457000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":1457000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":3013000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":3013000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":4609000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":4609000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":1615000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":1615000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":3225000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":3225000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":4793000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":4793000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":6352000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":6352000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":1335000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":1335000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":2618000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":2618000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":4289000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":4289000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":6011000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":6011000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":2025000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":4312000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-09-30","val":6643000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-12-31","val":9052000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":9052000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":9531000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"OperatingLeasePaymentsUse":{"label":"Operating Lease, Payments, Use","description":"Amount of cash outflow from operating lease to bring another asset to condition and location necessary for its intended use.","units":{"USD":[{"start":"2019-01-01","end":"2019-03-31","val":8000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":18000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":18000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":30000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":30000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":41000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":41000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":5000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":5000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":10000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":10000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":10000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":10000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":10000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":10000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021"}]}},"OperatingLeaseRightOfUseAsset":{"label":"Operating Lease, Right-of-Use Asset","description":"Amount of lessee's right to use underlying asset under operating lease.","units":{"USD":[{"end":"2018-12-31","val":3000000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":0,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-01-01","val":2200000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2019-01-01","val":2200000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2019-01-01","val":2200000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2019-01-01","val":2200000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-03-31","val":2024000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":12568000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":10443000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":9374000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":9374000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":9374000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":9374000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":9374000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":7839000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":7586000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":6093000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":4366000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":4366000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":4366000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":4366000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":4366000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":3409000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":16609000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":15787000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":16065000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":16065000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":16065000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":16065000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":16065000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":16163000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":16705000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":13669000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":12077000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":12077000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":12077000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":12077000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":12077000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":10229000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":9435000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":10085000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":12888000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":12888000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":20658000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"OperatingLeasesFutureMinimumPaymentsDue":{"label":"Operating Leases, Future Minimum Payments Due","description":"Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.","units":{"USD":[{"end":"2011-12-31","val":18800000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011Q4I"},{"end":"2012-12-31","val":15900000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012Q4I"},{"end":"2013-06-30","val":104000000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2015-03-31","val":25000000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":24000000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":24000000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":23000000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2016-12-31","val":1900000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28","frame":"CY2016Q4I"},{"end":"2017-12-31","val":2000000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2017Q4I"},{"end":"2018-12-31","val":1500000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2018Q4I"}]}},"OperatingLeasesFutureMinimumPaymentsDueCurrent":{"label":"Operating Leases, Future Minimum Payments Due, Next Twelve Months","description":"Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2011-12-31","val":6200000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011Q4I"},{"end":"2012-12-31","val":8300000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012Q4I"}]}},"OperatingLeasesFutureMinimumPaymentsDueInFourYears":{"label":"Operating Leases, Future Minimum Payments, Due in Four Years","description":"Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2011-12-31","val":1000000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011Q4I"}]}},"OperatingLeasesFutureMinimumPaymentsDueInThreeYears":{"label":"Operating Leases, Future Minimum Payments, Due in Three Years","description":"Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2011-12-31","val":5800000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011Q4I"},{"end":"2012-12-31","val":1100000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012Q4I"}]}},"OperatingLeasesFutureMinimumPaymentsDueInTwoYears":{"label":"Operating Leases, Future Minimum Payments, Due in Two Years","description":"Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2011-12-31","val":5900000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011Q4I"},{"end":"2012-12-31","val":6500000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012Q4I"}]}},"OperatingLeaseWeightedAverageDiscountRatePercent":{"label":"Operating Lease, Weighted Average Discount Rate, Percent","description":"Weighted average discount rate for operating lease calculated at point in time.","units":{"pure":[{"end":"2019-03-31","val":0.0507,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":0.05,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":0.05,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":0.05,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2019Q4I"},{"end":"2020-03-31","val":0.05,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":0.047,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":0.046,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":0.045,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020Q4I"},{"end":"2021-03-31","val":0.041,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":0.041,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":0.041,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":0.041,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":0.041,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":0.041,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":0.043,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":0.044,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":0.046,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":0.046,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-12-31","val":0.078,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"}]}},"OperatingLossCarryforwards":{"label":"Operating Loss Carryforwards","description":"Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.","units":{"USD":[{"end":"2011-12-31","val":7500000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011Q4I"},{"end":"2016-12-31","val":1300000000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q4I"}]}},"OperatingLossCarryforwardsValuationAllowance":{"label":"Operating Loss Carryforwards, Valuation Allowance","description":"The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized.","units":{"USD":[{"end":"2009-12-31","val":1100000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009Q4I"},{"end":"2010-12-31","val":1700000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-12-31","val":2300000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":2300000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-12-31","val":2100000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":6000000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":6000000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-12-31","val":6600000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":6600000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":6600000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-12-31","val":10900000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014Q4I"}]}},"OtherAccruedLiabilitiesCurrent":{"label":"Other Accrued Liabilities, Current","description":"Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer.","units":{"USD":[{"end":"2010-12-31","val":4890000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q4I"},{"end":"2011-06-30","val":7477000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-12-31","val":98844000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":98844000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":98844000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-06-30","val":102268000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":82187000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":73190000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":73190000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":73190000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":73190000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":73190000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":73190000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":90042000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":104791000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":58058000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":61164000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":61164000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":61164000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":61164000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":61164000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":61164000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":61164000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":61164000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":56533000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":56533000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":49870000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":49870000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":48498000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":41461000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":41461000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":41461000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":41461000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":41461000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":13266000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":13772000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":19509000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":9676000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":10883000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":10883000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":10883000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":10883000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":20445000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":41821000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":51930000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":38073000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":38073000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":38073000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":38073000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":38073000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":46992000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":28166000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":10655000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":17889000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":3873000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":3873000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":3873000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":17889000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":3388000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":2587000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":2816000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":7324000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":2491000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":2491000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":2491000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":2491000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":3140000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":2873000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":3585000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":4192000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":4192000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":4192000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":4192000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":4192000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":4261000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":12319000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":10175000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":10572000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":10572000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":10572000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":10572000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":10572000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":13735000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":10565000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":11266000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":23104000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":23104000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":26183000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"OtherAssetsCurrent":{"label":"Other Assets, Current","description":"Amount of current assets classified as other.","units":{"USD":[{"end":"2009-12-31","val":12123000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":12123000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":12123000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":12123000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":18514000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":16086000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":16086000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":18105000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":18105000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":18105000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":18105000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":18105000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":20253000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":14842000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":10712000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":5460000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":5460000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":5460000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":5460000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":5460000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":9437000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":10041000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":5873000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":7370000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":7370000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":7370000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":7370000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":7370000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":7370000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":8085000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":10169000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":7623000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":7600000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":7600000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":7600000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":7600000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":7600000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":7600000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":7600000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":7600000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":10081000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":9726000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":21033000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":21032000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":42063000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":9569000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":9569000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":9569000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":9569000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":9569000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":8006000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":5315000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":4299000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":10683000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":10683000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":4098000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":2352000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":2352000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":2352000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":2352000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":2877000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":3090000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":2928000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":2126000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":2126000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":2126000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":2126000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":2126000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":3110000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":3241000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":2683000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":2121000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":2121000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":2121000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":2121000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":2121000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":2846000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":3028000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":2628000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":2184000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":2184000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":2184000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":2184000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":2184000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":2388000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":3055000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":4016000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":1875000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":1875000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":1875000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":1875000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":1875000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":2164000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":7201000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":6468000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":2671000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":2671000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":2671000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":2671000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":2671000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":2672000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":3935000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":3825000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":5590000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":5590000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":5652000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"OtherAssetsMiscellaneousCurrent":{"label":"Other Assets, Miscellaneous, Current","description":"Amount of other miscellaneous assets expected to be realized or consumed within one year or operating cycle, if longer.","units":{"USD":[{"end":"2015-12-31","val":2400000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":2400000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28","frame":"CY2015Q4I"}]}},"OtherAssetsNoncurrent":{"label":"Other Assets, Noncurrent","description":"Amount of noncurrent assets classified as other.","units":{"USD":[{"end":"2009-12-31","val":10201000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":10201000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":10201000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":10201000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":9710000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":13079000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":13079000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":12713000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":12713000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":12713000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":12713000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":12713000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":12340000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":12613000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":12222000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":16552000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":16552000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":16552000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":16552000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":16552000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":15752000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":15290000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":14803000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":18504000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":18504000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":18504000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":18504000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":18504000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":18504000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":17930000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":17988000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":17411000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":17199000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":17199000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":17199000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":17199000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":17199000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":17199000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":17199000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":17199000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":15585000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":15585000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":15030000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":15030000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":14235000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":13641000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":13641000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":13641000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":13641000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":13641000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":13039000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":14144000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":13471000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":5248000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":5248000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":5751000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":13304000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":10751000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":10751000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":10751000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":13517000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":7076000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":6535000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":5567000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":5567000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":5567000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":5567000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":5567000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":5231000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":4895000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":4558000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":3622000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":3622000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":3622000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":3622000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":3622000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":2770000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":2022000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":1752000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":1421000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":1421000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":1421000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":1421000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":1421000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":1162000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":3069000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":2904000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":5641000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":5641000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":5641000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":5641000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":5641000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":3629000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":10041000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":18368000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":9208000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":9208000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":9208000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":9208000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":9208000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":8646000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":8159000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":7581000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":31090000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":31090000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":28876000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"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":"2016-12-31","val":8800000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-12-31","val":8800000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-12-31","val":8800000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-12-31","val":8800000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07","frame":"CY2016Q4I"},{"end":"2017-12-31","val":6200000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01"},{"end":"2017-12-31","val":6200000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":6200000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":6200000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q4I"}]}},"OtherCommitmentDueInFourthYear":{"label":"Other Commitment, to be Paid, Year Four","description":"Amount of commitment classified as other 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":"2016-12-31","val":4.4,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-12-31","val":4.4,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-12-31","val":4.4,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-12-31","val":4.4,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07","frame":"CY2016Q4I"}]}},"OtherComprehensiveIncomeDerivativesQualifyingAsHedgesBeforeTaxPeriodIncreaseDecrease":{"label":"Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax (Deprecated 2012-01-31)","description":"Pre tax change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges, net of reclassifications into earnings during the period. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. Includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. 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":"2011-06-30","val":-333000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":-405000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":-520000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":212000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"}]}},"OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease":{"label":"Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax (Deprecated 2012-01-31)","description":"Net of tax effect change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges after taxes. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. The change includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. 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":"2011-06-30","val":-212000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":-257000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":-330000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":135000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"}]}},"OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxEffectPeriodIncreaseDecrease":{"label":"Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Effect (Deprecated 2012-01-31)","description":"Total tax effect of the change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. The change includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. 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":"2011-06-30","val":121000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":148000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":190000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-77000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"}]}},"OtherComprehensiveIncomeLossBeforeTax":{"label":"Other Comprehensive Income (Loss), before Tax","description":"Amount before tax, after reclassification adjustments of other comprehensive income (loss).","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":136000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":550000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":698000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":218000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":-332000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":218000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":218000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":218000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":410000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":-411000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":-411000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":-178000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":-178000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":-178000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"}]}},"OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecrease":{"label":"Other Comprehensive Income (Loss), before Tax (Deprecated 2012-01-31)","description":"This element represents Other Comprehensive Income or Loss, Before Tax, for the period. The pretax revenues, expenses, gains, and losses that under generally accepted accounting principles are included in comprehensive income, but excluded from net income. Includes the entity's proportionate share of an investee's equity adjustments for other comprehensive income. 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":-148000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2012-01-01","end":"2012-03-31","val":410000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"}]}},"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":85000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":348000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":442000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":138000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":-210000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":138000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-12-31","val":138000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":138000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":138000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":138000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":261000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":-261000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":-261000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":-113000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":-113000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":-113000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":-113000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"}]}},"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":"2008-01-01","end":"2008-12-31","val":414000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":-223000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2009-01-01","end":"2009-12-31","val":-223000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":-223000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":-223000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-12-31","val":-223000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":279000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-09-30","val":223000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":223000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-12-31","val":85000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010"},{"start":"2010-01-01","end":"2010-12-31","val":85000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":85000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-12-31","val":85000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2010-01-01","end":"2010-12-31","val":85000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2011-01-01","end":"2011-03-31","val":-94000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-03-31","val":-94000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-06-30","val":348000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":138000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":138000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011"},{"start":"2011-01-01","end":"2011-12-31","val":138000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2012-01-01","end":"2012-03-31","val":261000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"}]}},"OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax":{"label":"Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax","description":"Amount before tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":738000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":738000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":-1210000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":-1210000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":-1210000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014"}]}},"OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax":{"label":"Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax","description":"Amount after tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":468000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":468000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":-770000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":-770000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":-770000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014"}]}},"OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax":{"label":"Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax","description":"Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":270000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":270000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":-440000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":-440000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":-440000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014"}]}},"OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeBeforeTax":{"label":"Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax (Deprecated 2013-01-31)","description":"Before tax amount of the income statement impact of the reclassification adjustment of accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges realized in net income. Also includes reclassification adjustments of an entity's share of an equity investee's deferred hedging gain (loss) realized in net income.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":-732000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":883000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":1050000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":623000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":-260000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":738000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":198000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-1171000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-06-30","val":-1171000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":-1369000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-04-01","end":"2012-06-30","val":-1369000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":-1415000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-09-30","val":-1415000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":-244000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-07-01","end":"2012-09-30","val":-244000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":-1210000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3"}]}},"OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax":{"label":"Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives 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 of accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges realized in net income. Also includes reclassification adjustments of an entity's share of an equity investee's deferred hedging gain (loss) realized in net income.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":-463000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":559000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":666000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":394000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":-165000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":468000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":126000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-745000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-06-30","val":-745000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":-871000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-04-01","end":"2012-06-30","val":-871000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":-900000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-09-30","val":-900000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":-155000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-07-01","end":"2012-09-30","val":-155000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":-770000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3"}]}},"OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeTax":{"label":"Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Tax (Deprecated 2013-01-31)","description":"Tax effect of the income statement impact of the reclassification adjustment of accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges realized in net income. Also includes reclassification adjustments of an entity's share of an equity investee's deferred hedging gain (loss) realized in net income.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":-269000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":324000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":384000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":229000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":-95000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":270000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":72000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-426000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-06-30","val":-426000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":-498000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-04-01","end":"2012-06-30","val":-498000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":-515000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-09-30","val":-515000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":-89000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-07-01","end":"2012-09-30","val":-89000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":-440000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3"}]}},"OtherComprehensiveIncomeLossTax":{"label":"Other Comprehensive Income (Loss), Tax","description":"Amount of tax expense (benefit) allocated to other comprehensive income (loss).","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":51000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-54000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":202000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":256000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":80000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":-122000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":80000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":80000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":80000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":149000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":149000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":-150000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":-150000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":-65000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":-65000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":-65000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"}]}},"OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeBeforeTax":{"label":"Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax (Deprecated 2012-01-31)","description":"Pre tax reclassification adjustment for accumulated gains and losses from derivative instrument designated and qualifying as the effective portion of cash flow hedges included in accumulated comprehensive income that was realized in net income during the period. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk.","units":{"USD":[{"start":"2011-01-01","end":"2011-03-31","val":-167000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2012-01-01","end":"2012-03-31","val":198000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"}]}},"OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax":{"label":"Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax (Deprecated 2012-01-31)","description":"Net of tax effect of the reclassification adjustment for accumulated gains and losses from derivative instrument designated and qualifying as the effective portion of cash flow hedges included in accumulated comprehensive income that was realized in net income during the period.","units":{"USD":[{"start":"2011-01-01","end":"2011-03-31","val":-107000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2012-01-01","end":"2012-03-31","val":126000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"}]}},"OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeTax":{"label":"Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Tax (Deprecated 2012-01-31)","description":"Tax effect on reclassification adjustment for accumulated gains and losses from derivative instrument designated and qualifying as the effective portion of cash flow hedges included in accumulated comprehensive income that was realized in net income during the period.","units":{"USD":[{"start":"2011-01-01","end":"2011-03-31","val":-60000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2012-01-01","end":"2012-03-31","val":72000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"}]}},"OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax":{"label":"Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax","description":"Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":868000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":19000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-333000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":-352000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":-405000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":-72000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":-520000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":-520000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":-520000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":212000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":212000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":1171000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":1171000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":958000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":958000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":1237000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":1237000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":66000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":66000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":1210000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":1210000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":1210000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":1210000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014"}]}},"OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax":{"label":"Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax","description":"Amount after tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":549000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":12000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-212000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":-224000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":-257000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":-45000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":-330000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":-330000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":-330000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":135000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":135000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":745000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":745000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":609000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":609000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":787000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":787000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":42000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":42000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":770000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":770000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":770000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":770000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014"}]}},"OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax":{"label":"Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax","description":"Amount of tax expense (benefit), before reclassification adjustments, related to increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":319000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":7000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-121000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":-128000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":-148000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":-27000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":-190000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":-190000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":-190000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":77000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":77000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":426000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":426000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":349000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":349000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":450000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":450000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":24000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":24000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":440000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":440000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":440000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":440000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014"}]}},"OtherLiabilitiesCurrent":{"label":"Other Liabilities, Current","description":"Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer.","units":{"USD":[{"end":"2013-09-30","val":400000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":10990000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q4I"},{"end":"2014-09-30","val":13089000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":17825000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":17825000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":17825000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":17825000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":10402000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":12938000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":12589000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":6444000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":12996000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":12996000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":12996000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":12996000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":10713000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":10953000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":12671000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":14681000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":14681000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":14681000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":14681000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":14681000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":11719000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":11755000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":8983000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":9166000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":9166000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":9166000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":9166000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":9166000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":8705000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":5916000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":8619000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":11098000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":11098000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":11098000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":11098000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":11098000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":26416000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":13570000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":17328000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":23577000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":23577000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":23577000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":23577000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":23577000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":18731000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":23323000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":32318000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":27160000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":27160000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":27160000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":27160000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":27160000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":16743000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":18463000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":22462000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":20425000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":20425000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":37754000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"OtherLiabilitiesNoncurrent":{"label":"Other Liabilities, Noncurrent","description":"Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer.","units":{"USD":[{"end":"2009-12-31","val":1990000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":1990000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":1990000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":1990000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":1871000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":1811000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":1811000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":1752000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":7804000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":7804000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":7804000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":7804000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":8785000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":9855000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":10221000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":10709000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":10709000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":10709000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":10709000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":10709000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":10853000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":10688000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":10795000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":9901000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":9901000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":9901000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":9901000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":9901000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":10198000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":10069000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":10162000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":10253000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":10324000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":10324000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":10324000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":10324000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":10324000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":10324000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":10324000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":10324000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":9831000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":9831000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":9695000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":9695000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":9631000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":7018000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":7018000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":7018000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":7018000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":7018000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":9181000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":10311000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":9511000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":3891000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":3891000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":685000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":8312000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":5554000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":5554000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":5554000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":7601000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":2500000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":1250000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2018Q4I"},{"end":"2019-12-31","val":0,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":0,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":30000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":162000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":292000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":424000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":424000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":424000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":424000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":424000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":270000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":490000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":846000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":3043000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":3043000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":3043000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":3043000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":3043000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":1663000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":5066000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":2764000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":3588000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":3588000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":3588000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":3588000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":3588000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":565000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":541000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":922000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":710000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":710000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":0,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"OtherLongTermDebtCurrent":{"label":"Other Long-term Debt, Current","description":"Amount of long-term debt classified as other, payable within one year or the operating cycle, if longer.","units":{"USD":[{"end":"2014-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-12-31","val":324900000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":324900000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":339900000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"}]}},"OtherNoncashExpense":{"label":"Other Noncash Expense","description":"Amount of expense or loss included in net income that result in no cash flow, classified as other.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":-8640000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":10162000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":8282000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":8282000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":16133000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":16133000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":-2557000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":-1741000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":-1741000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":473000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":473000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":473000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":1563000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":1563000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":1563000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-8589000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":-8589000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-5240000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":-5240000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":-1410000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":-1410000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":2143000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":2143000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":2143000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":2143000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-2889000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":-2889000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-1277000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":-1277000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":-583000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":-583000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":976000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":976000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":976000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":976000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":-3864000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":-3864000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":-4161000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-6024000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":-3796000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":-5146000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":-5443000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":-5443000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":-5443000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-3216000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":-2862000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-12-31","val":-8910000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":-8910000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":-831000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"}]}},"OtherNoncashIncomeExpense":{"label":"Other Noncash Income (Expense)","description":"Amount of income (expense) included in net income that results in no cash inflow (outflow), classified as other.","units":{"USD":[{"start":"2013-01-01","end":"2013-06-30","val":6024000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":6321000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-09-30","val":4093000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":2862000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":2439000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":2439000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":2439000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":390000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":390000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-03-31","val":-373000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":-373000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-3606000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":-3627000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2016-01-01","end":"2016-03-31","val":-2551000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":315000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":-482000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":-760000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":559000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":-129000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":-129000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-3374000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":-3374000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":-4114000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":-4114000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":-5293000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":-5293000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-564000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":-564000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-1160000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":-1160000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":-1782000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":-1782000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":-2930000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":-2930000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":-1142000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":-1142000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":-1814000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":-1814000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":-2436000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":-2436000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":-3061000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":-3061000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":-344000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":-344000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":-1202000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":-1202000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":-1883000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":-1883000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":-2877000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":-2877000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":-2877000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-1138000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":-1138000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-1668000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":-1668000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":6425000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":6425000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":-3010000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":-3010000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-756000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":-756000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-1312000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":-2028000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":-3528000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-3362000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"OtherNonoperatingIncomeExpense":{"label":"Other Nonoperating Income (Expense)","description":"Amount of income (expense) related to nonoperating activities, classified as other.","units":{"USD":[{"start":"2017-01-01","end":"2017-03-31","val":-142000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":-141000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":1000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":-133000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":12000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":-8000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":-158000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":-158000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-703000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":-703000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":-546000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":-546000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":-477000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":-477000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":226000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":226000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":-391000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":-391000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":65000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":65000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":37000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":37000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":-28000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":-28000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":173000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":173000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":134000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":134000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":90000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":90000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":107000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":107000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":107000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":107000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":-1000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":-1000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":50000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":50000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":-56000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":-56000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":72000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":72000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":-1000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":-1000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":9000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":9000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":12000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":12000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":6000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":6000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":-3000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":-3000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":10000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":10000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":10000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":61000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":61000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":52000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":52000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":-10000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":-10000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":57000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":57000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":5000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":5000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":95000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":95000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-24000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":-24000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":4000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":29000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":117000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":112000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":197000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":156000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"OtherOperatingIncomeExpenseNet":{"label":"Other Operating Income (Expense), Net","description":"The net amount of other operating income and expenses, the components of which are not separately disclosed on the income statement, from items that are associated with the entity's normal revenue producing operations.","units":{"USD":[{"start":"2014-01-01","end":"2014-06-30","val":-7370000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":-2493000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":-2472000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":4898000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2015-01-01","end":"2015-03-31","val":979000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-1133000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":-2112000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":-1041000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":92000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2016-01-01","end":"2016-03-31","val":-95000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"}]}},"OtherReceivables":{"label":"Other Receivables","description":"Amount due from parties in nontrade transactions, classified as other.","units":{"USD":[{"end":"2010-12-31","val":1400000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q4I"},{"end":"2011-06-30","val":1400000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2012-12-31","val":4000000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":4100000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":4000000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-09-30","val":1800000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":800000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":800000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":800000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":800000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":800000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":800000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":800000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":800000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":300000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":300000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":800000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":800000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":1700000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":2200000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":2200000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":2200000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":2200000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":2200000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":2800000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":1600000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":1000000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":700000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":700000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10"},{"end":"2015-12-31","val":700000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2015-12-31","val":700000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2015-12-31","val":700000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28","frame":"CY2015Q4I"},{"end":"2016-03-31","val":2100000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2016-06-30","val":2700000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09","frame":"CY2016Q2I"},{"end":"2016-09-30","val":900000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03","frame":"CY2016Q3I"},{"end":"2016-12-31","val":600000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-12-31","val":600000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-12-31","val":600000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-12-31","val":600000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-12-31","val":600000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q4I"},{"end":"2017-03-31","val":700000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08","frame":"CY2017Q1I"},{"end":"2017-06-30","val":1000000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09","frame":"CY2017Q2I"},{"end":"2017-09-30","val":700000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07","frame":"CY2017Q3I"},{"end":"2017-12-31","val":3000000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01"},{"end":"2017-12-31","val":3000000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":3000000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":3000000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":3000000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":300000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":2800000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":2700000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":1600000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":1600000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":1600000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":1600000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":1600000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":1900000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":4400000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":4100000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":3300000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":3300000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":3300000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":3300000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":3300000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":7300000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":5600000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":4200000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":700000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":700000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":700000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":700000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":700000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":300000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":400000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":400000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":1500000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":1500000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":1500000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":1500000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":1500000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2021-12-31","val":1500000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2021-12-31","val":1500000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021Q4I"},{"end":"2022-03-31","val":500000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":700000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":5600000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":8900000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":8900000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":8900000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":8900000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":8900000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2022-12-31","val":8900000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2022Q4I"},{"end":"2023-03-31","val":12700000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":10400000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":8800000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":14200000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":14100000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":15800000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"OtherReceivablesNetCurrent":{"label":"Other Receivables, Net, Current","description":"Amount, after allowance, of receivables classified as other, due within one year or the operating cycle, if longer.","units":{"USD":[{"end":"2012-06-30","val":1800000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2013-03-31","val":200000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":200000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":400000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2014-03-31","val":100000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":100000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":100000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":100000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":1000000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"}]}},"OtherSignificantNoncashTransactionValueOfConsiderationGiven1":{"label":"Other Significant Noncash Transaction, Value of Consideration Given","description":"\"The value of the noncash (or part noncash) consideration given (for example, liability, equity) in a 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 a transaction not resulting in cash receipts or cash payments in the period.\"","units":{"USD":[{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":10023000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":10023000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":83522000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":83522000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":83522000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-1134000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":1134000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":156259000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":-156259000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":156259000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":156259000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":156252000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":156252000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":0,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":0,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"OtherTaxExpenseBenefit":{"label":"Other Tax Expense (Benefit)","description":"Amount of other income tax expense (benefit).","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011"},{"start":"2013-01-01","end":"2013-12-31","val":2200000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":2200000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":2200000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013"}]}},"PaymentsForProceedsFromOtherInvestingActivities":{"label":"Payments for (Proceeds from) Other Investing Activities","description":"Amount of cash (inflow) outflow from investing activities classified as other.","units":{"USD":[{"start":"2017-01-01","end":"2017-03-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":6042000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":6042000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":6042000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":6042000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":7036000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":7036000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":8740000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":8740000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":1278000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":1278000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":2840000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":2840000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":4402000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":4402000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":5112000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":5112000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":142000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":142000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":426000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":426000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":426000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":426000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":826000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":826000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":1084000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":1084000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":1084000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":1084000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":1084000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":1084000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":1084000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-06-30","val":750000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":750000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":750000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":750000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":750000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":750000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-06-30","val":0,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"PaymentsForRepurchaseOfCommonStock":{"label":"Payments for Repurchase of Common Stock","description":"The cash outflow to reacquire common stock during the period.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":3622000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":657000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":846000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":846000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":884000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":884000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":1676000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":1763000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":1763000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":1775000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":1775000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":1775000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":1828000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":1828000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":1828000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":3262000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":3262000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":3289000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":3289000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":3319000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":3319000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":3393000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":3393000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":3393000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":3393000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":2636000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":2636000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":2686000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":2686000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":2781000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":2781000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":2805000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":2805000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":2805000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":2805000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":1409000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":1409000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":1409000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":1433000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":1433000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":1433000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-09-30","val":1494000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":1494000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":1513000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":1513000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":1513000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":1513000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":855000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":855000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":855000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":896000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":896000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":896000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":954000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":954000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":1065000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":1065000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":154000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":154000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":150000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":150000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":154000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":4000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":267000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":618000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":618000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":777000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":290000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":290000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":418000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":418000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":418000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":418000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":418000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":418000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":260000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":260000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":318000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":318000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":323000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":323000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":412000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":412000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":83000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":83000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":86000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":86000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":90000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":90000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":90000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":90000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":488000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":488000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":603000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":603000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":612000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":612000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":612000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":612000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":612000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":2462000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":2462000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":2965000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":2965000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":3404000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":3404000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":3397000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":3397000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":2945000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":2945000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":3066000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":3082000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":3083000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":534000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"PaymentsForRestructuring":{"label":"Payments for Restructuring","description":"Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.","units":{"USD":[{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2016-01-01","end":"2016-03-31","val":5007000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"}]}},"PaymentsOfDebtIssuanceCosts":{"label":"Payments of Debt Issuance Costs","description":"The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":0,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-09-30","val":0,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":0,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":5040000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":5040000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-09-30","val":3481000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":3481000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":3481000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":3631000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":3631000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":3631000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":4327000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":4327000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":4327000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":4327000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":4712000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":4712000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":4712000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":4712000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":0,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-06-30","val":571000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":571000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":2444000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2017-01-01","end":"2017-03-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":4073000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":4073000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":10031000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":317000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":317000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":317000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":317000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":330000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":330000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":602000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":602000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-09-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":31000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":31000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":2400000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":2400000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":2400000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":2400000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":3611000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":3611000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":3611000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":117000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":117000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":7207000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":7207000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":7228000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":7228000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":7342000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":7342000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":0,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":0,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":30600000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"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":6100000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":7700000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2010-01-01","end":"2010-12-31","val":7700000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":7700000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":7700000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"}]}},"PaymentsToAcquireOilAndGasProperty":{"label":"Payments to Acquire Oil and Gas Property","description":"The cash outflow to purchase of mineral interests in oil and gas properties for use in the normal oil and gas operations and not intended for resale.","units":{"USD":[{"start":"2017-01-01","end":"2017-12-31","val":9426000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":1002000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":1002000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-06-30","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":3394000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":3394000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":3441000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":3441000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":4544000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":205000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":205000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":207000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":207000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":13219000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2022-01-01","end":"2022-03-31","val":-436000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":272225000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"}]}},"PaymentsToAcquireOilAndGasPropertyAndEquipment":{"label":"Payments to Acquire Oil and Gas Property and Equipment","description":"The cash outflow to purchase long lived physical asset for use in the normal oil and gas operations and to purchase mineral interests in oil and gas properties not intended for resale.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":46472000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011"},{"start":"2020-01-01","end":"2020-12-31","val":4544000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-09-30","val":13219000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":51734000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021"},{"start":"2022-01-01","end":"2022-09-30","val":293880000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"}]}},"PaymentsToAcquirePropertyPlantAndEquipment":{"label":"Payments to Acquire Property, Plant, and Equipment","description":"The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":628325000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":135801000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":164504000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":164504000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":215370000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":215370000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":63386000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":129116000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":129116000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":228379000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":228379000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":228379000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":353648000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":353648000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":353648000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":131911000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":131911000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":244798000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":244798000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":368754000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":368754000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":505332000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":505332000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":505332000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":505332000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":187915000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":187915000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":374753000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":374753000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":575711000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":575711000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":757755000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":757755000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":757755000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":757755000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":132981000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":132981000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":132981000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":265317000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":265317000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":265317000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-09-30","val":435722000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":435722000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":540368000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":540368000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":540368000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":540368000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":105589000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":105589000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":105589000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":208979000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":208979000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":208979000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":316972000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":316972000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":386336000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":386336000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":49173000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":49173000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":104997000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":126752000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":139688000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":36595000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":25417000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":85655000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":141636000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":192982000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":33753000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":33753000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":84097000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":84097000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":163151000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":163151000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":266532000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":266532000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":86555000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":86555000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":174138000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":174138000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":234859000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":234859000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":282660000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":282660000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":52618000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":52618000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":85594000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":85594000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":102713000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":102713000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":114738000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":114738000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":35852000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":35852000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":56995000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":56995000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":98219000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-12-31","val":133638000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":35228000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":93746000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"}]}},"PostconfirmationAccumulatedDepreciationAndAmortization":{"label":"Postconfirmation, Accumulated Depreciation and Amortization","description":"Amount of accumulated depreciation and amortization at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":0,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":0,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":0,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PostconfirmationAdditionalPaidInCapital":{"label":"Postconfirmation, Additional Paid-in Capital","description":"Amount of additional paid-in capital at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":229299000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":229299000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":229299000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":229299000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":229299000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":229299000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":229299000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PostconfirmationAssets":{"label":"Postconfirmation, Assets","description":"Total assets at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":614709000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":614709000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":614709000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":614709000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":614709000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":614709000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":614709000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PostconfirmationCashAndCashEquivalents":{"label":"Postconfirmation, Cash and Cash Equivalents","description":"Amount of cash and cash equivalents at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":8739000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":8739000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":8739000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":8739000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":8739000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":8739000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":8739000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PostconfirmationCommonStock":{"label":"Postconfirmation, Common Stock","description":"Amount of common stock at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":100000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":100000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":100000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":100000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":100000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":100000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":100000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PostconfirmationCurrentAssets":{"label":"Postconfirmation, Current Assets","description":"Total current assets at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":45923000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":45923000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":45923000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":45923000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":45923000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":45923000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":45923000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PostconfirmationCurrentLiabilities":{"label":"Postconfirmation, Current Liabilities","description":"Total current liabilities at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":73318000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":73318000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":73318000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":73318000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":73318000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":73318000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":73318000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PostconfirmationCurrentMaturitiesOfLongTermDebt":{"label":"Postconfirmation, Current Maturities of Long-term Debt","description":"Amount of current maturities of long-term debt at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":0,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":0,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":0,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PostconfirmationLiabilities":{"label":"Postconfirmation, Liabilities","description":"Total liabilities at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":385310000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":385310000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":385310000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":385310000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":385310000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":385310000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":385310000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PostconfirmationLiabilitiesAndStockholdersEquity":{"label":"Postconfirmation, Liabilities and Stockholders' Equity","description":"Total liabilities and stockholders' equity at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":614709000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":614709000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":614709000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":614709000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":614709000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":614709000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":614709000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PostconfirmationLiabilitiesSubjectToCompromise":{"label":"Postconfirmation, Liabilities Subject to Compromise","description":"Amount of liabilities subject to compromise at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":0,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":0,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":0,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PostconfirmationLongTermDebt":{"label":"Postconfirmation, Long-term Debt","description":"Total long-term debt at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":253000000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":253000000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":253000000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":253000000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":253000000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":253000000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":253000000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PostconfirmationNoncurrentOtherObligations":{"label":"Postconfirmation, Noncurrent Other Obligations","description":"Amount of other noncurrent obligations at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":1091000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":1091000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":1091000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":1091000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":1091000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":1091000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":1091000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PostconfirmationOtherAssetsNoncurrent":{"label":"Postconfirmation, Other Assets, Noncurrent","description":"Amount of other noncurrent assets at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":10219000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":10219000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":10219000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":10219000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":10219000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":10219000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":10219000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PostconfirmationOtherNoncurrentObligations":{"label":"Postconfirmation, Other Noncurrent Obligations","description":"Total other noncurrent obligations at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":58992000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":58992000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":58992000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":58992000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":58992000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":58992000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":58992000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PostconfirmationOtherPropertyAndEquipment":{"label":"Postconfirmation, Other Property and Equipment","description":"Amount of other property and equipment at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":558567000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":558567000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":558567000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":558567000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":558567000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":558567000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":558567000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PostconfirmationPreferredAndCommonStockHeldInTreasury":{"label":"Postconfirmation, Preferred and Common Stock Held in Treasury","description":"Amount of preferred and common stock held in treasury at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":0,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":0,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":0,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PostconfirmationPrepaidAndOtherCurrentAssets":{"label":"Postconfirmation, Prepaid and Other Current Assets","description":"Amount of prepaid and other current assets at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":3503000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":3503000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":3503000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":3503000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":3503000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":3503000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":3503000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PostconfirmationPropertyAndEquipmentNet":{"label":"Postconfirmation, Property and Equipment, Net","description":"Total property and equipment, net at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":558567000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":558567000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":558567000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":558567000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":558567000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":558567000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":558567000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PostconfirmationReceivablesNet":{"label":"Postconfirmation, Receivables, Net","description":"Amount of receivables, net at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":33681000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":33681000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":33681000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":33681000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":33681000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":33681000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":33681000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PostconfirmationRetainedEarningsDeficit":{"label":"Postconfirmation, Retained Earnings (Deficit)","description":"Amount of retained earnings or deficit at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":0,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":0,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":0,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PostconfirmationStockholdersEquity":{"label":"Postconfirmation, Stockholders' Equity","description":"Total stockholders' equity at the balance sheet date after fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":229399000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":229399000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":229399000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":229399000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":229399000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":229399000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":229399000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PreconfirmationAccumulatedDepreciationAndAmortization":{"label":"Preconfirmation, Accumulated Depreciation and Amortization","description":"Amount of accumulated depreciation and amortization at the balance sheet date before fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":5676252000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":5676252000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":5676252000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":5676252000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":5676252000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":5676252000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":5676252000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PreconfirmationAdditionalPaidInCapital":{"label":"Preconfirmation, Additional Paid-in Capital","description":"Amount of additional paid-in capital at the balance sheet date before fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":777475000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":777475000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":777475000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":777475000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":777475000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":777475000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":777475000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PreconfirmationAssets":{"label":"Preconfirmation, Assets","description":"Total assets at the balance sheet date before fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":431083000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":431083000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":431083000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":431083000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":431083000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":431083000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":431083000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PreconfirmationCashAndCashEquivalents":{"label":"Preconfirmation, Cash and Cash Equivalents","description":"Amount of cash and cash equivalents at the balance sheet date before fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":57599000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":57599000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":57599000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":57599000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":57599000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":57599000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":57599000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PreconfirmationCommonStock":{"label":"Preconfirmation, Common Stock","description":"Amount of common stock at the balance sheet date before fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":450000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":450000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":450000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":450000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":450000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":450000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":450000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PreconfirmationCurrentAssets":{"label":"Preconfirmation, Current Assets","description":"Total current assets at the balance sheet date before fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":95380000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":95380000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":95380000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":95380000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":95380000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":95380000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":95380000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PreconfirmationCurrentLiabilities":{"label":"Preconfirmation, Current Liabilities","description":"Total current liabilities at the balance sheet date before fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":443473000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":443473000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":443473000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":443473000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":443473000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":443473000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":443473000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PreconfirmationCurrentMaturitiesOfLongTermDebt":{"label":"Preconfirmation, Current Maturities of Long-term Debt","description":"Amount of current maturities of long-term debt at the balance sheet date before fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":364500000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":364500000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":364500000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":364500000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":364500000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":364500000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":364500000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PreconfirmationLiabilities":{"label":"Preconfirmation, Liabilities","description":"Total liabilities at the balance sheet date before fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":1408778000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":1408778000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":1408778000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":1408778000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":1408778000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":1408778000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":1408778000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PreconfirmationLiabilitiesAndStockholdersEquity":{"label":"Preconfirmation, Liabilities and Stockholders' Equity","description":"Total liabilities and stockholders' equity at the balance sheet date before fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":431083000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":431083000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":431083000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":431083000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":431083000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":431083000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":431083000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PreconfirmationLiabilitiesSubjectToCompromise":{"label":"Preconfirmation, Liabilities Subject to Compromise","description":"Amount of liabilities subject to compromise at the balance sheet date before fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":911381000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":911381000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":911381000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":911381000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":911381000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":911381000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":911381000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PreconfirmationLongTermDebt":{"label":"Preconfirmation, Long-term Debt","description":"Total long-term debt at the balance sheet date before fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":0,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":0,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":0,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":0,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PreconfirmationNoncurrentOtherObligations":{"label":"Preconfirmation, Noncurrent Other Obligations","description":"Amount of other noncurrent obligations at the balance sheet date before fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":2124000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":2124000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":2124000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":2124000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":2124000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":2124000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":2124000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PreconfirmationOtherAssetsNoncurrent":{"label":"Preconfirmation, Other Assets, Noncurrent","description":"Amount of other noncurrent assets at the balance sheet date before fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":4629000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":4629000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":4629000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":4629000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":4629000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":4629000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":4629000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PreconfirmationOtherPropertyAndEquipment":{"label":"Preconfirmation, Other Property and Equipment","description":"Amount of other property and equipment at the balance sheet date before fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":6007326000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":6007326000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":6007326000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":6007326000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":6007326000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":6007326000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":6007326000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PreconfirmationPreferredAndCommonStockHeldInTreasury":{"label":"Preconfirmation, Preferred and Common Stock Held in Treasury","description":"Amount of preferred and common stock held in treasury at the balance sheet date before fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":2496000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":2496000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":2496000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":2496000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":2496000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":2496000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":2496000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PreconfirmationPrepaidAndOtherCurrentAssets":{"label":"Preconfirmation, Prepaid and Other Current Assets","description":"Amount of prepaid and other current assets at the balance sheet date before fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":3503000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":3503000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":3503000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":3503000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":3503000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":3503000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":3503000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PreconfirmationPropertyAndEquipmentNet":{"label":"Preconfirmation, Property and Equipment, Net","description":"Total property and equipment, net at the balance sheet date before fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":331074000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":331074000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":331074000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":331074000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":331074000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":331074000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":331074000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PreconfirmationReceivablesNet":{"label":"Preconfirmation, Receivables, Net","description":"Amount of receivables, net at the balance sheet date before fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":34278000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":34278000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":34278000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":34278000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":34278000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":34278000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":34278000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PreconfirmationRetainedEarningsDeficit":{"label":"Preconfirmation, Retained Earnings (Deficit)","description":"Amount of retained earnings or deficit at the balance sheet date before fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":-1753124000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":-1753124000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":-1753124000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":-1753124000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":-1753124000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":-1753124000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":-1753124000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"PreconfirmationStockholdersEquity":{"label":"Preconfirmation, Stockholders' Equity","description":"Total stockholders' equity at the balance sheet date before fresh-start adjustments.","units":{"USD":[{"end":"2016-04-22","val":-977695000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":-977695000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":-977695000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":-977695000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":-977695000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":-977695000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":-977695000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"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":"2009-12-31","val":0.01,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":0.01,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":0.01,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":0.01,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":0.01,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":0.01,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":0.01,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":0.01,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":0.01,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":0.01,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":0.01,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":0.01,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":0.01,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":0.01,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":0.01,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":0.01,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":0.01,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":0.01,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":0.01,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":0.01,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":0.01,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":0.01,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":0.01,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":0.01,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":0.01,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":0.01,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":0.01,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":0.01,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":0.01,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":0.01,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":0.01,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":0.01,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":0.01,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":0.01,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":0.01,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":0.01,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":0.01,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":0.01,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":0.01,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":0.01,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":0.01,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":0.01,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":0.01,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":0.01,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":0.01,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":0.01,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":0.01,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":0.01,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":0.01,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":0.01,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":0.01,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":0.01,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":0.01,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0.01,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":0.01,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":0.01,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":0.01,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":0.01,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":0.01,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":0.01,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":0.01,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":0.01,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":0.01,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":0.01,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":0.01,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":0.01,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":0.01,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":0.01,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":0.01,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":0.01,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":0.01,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":0.01,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":0.01,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":0.01,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":0.01,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":0.01,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":0.01,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":0.01,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":0.01,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":0.01,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":0.01,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":0.01,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":0.01,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":0.01,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":0.01,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":0.01,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":0.01,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":0.01,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":0.01,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":0.01,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":0.01,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":0.01,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":0.01,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":0.01,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":0.01,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":0.01,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":0.01,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":0.01,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":0.01,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":0.01,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":0.01,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":0.01,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":0.01,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":0.01,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":0.01,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":0.01,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"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":5000000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":5000000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":5000000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-06-30","val":5000000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":5000000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":5000000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":5000000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":5000000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":5000000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":5000000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":5000000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":5000000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":5000000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":5000000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":5000000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":5000000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":5000000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":5000000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":5000000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":5000000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":5000000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":5000000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":5000000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":5000000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":5000000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":5000000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":5000000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":5000000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":5000000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":5000000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":5000000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":5000000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":5000000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":5000000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":5000000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":5000000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":5000000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":5000000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":5000000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":5000000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":5000000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":5000000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":5000000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":5000000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":5000000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":5000000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":10000000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":10000000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":10000000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":10000000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":10000000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":10000000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":10000000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":10000000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":10000000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":10000000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":10000000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":10000000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":10000000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":10000000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":10000000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":10000000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":10000000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":10000000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":10000000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":10000000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":10000000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":10000000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":10000000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":10000000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":10000000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":10000000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":10000000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":10000000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":10000000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":10000000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":10000000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":10000000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":10000000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":10000000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":10000000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":10000000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":10000000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":10000000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":10000000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":10000000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":10000000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":10000000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":10000000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":10000000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":10000000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":10000000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":10000000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":10000000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":10000000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"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":"2009-12-31","val":0,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":0,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":0,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":0,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":0,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":0,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":0,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":0,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":0,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":0,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q4I"},{"end":"2011-03-31","val":0,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":0,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-12-31","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-06-30","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":0,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":0,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":0,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":0,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":0,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":0,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":0,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":0,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":0,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":0,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":0,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":0,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":0,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":0,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":0,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":0,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":0,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":0,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":0,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":0,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":0,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":0,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":0,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":0,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":0,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":0,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":0,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":0,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":0,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":0,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":0,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":0,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":0,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"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":"2009-12-31","val":0,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":0,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":0,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":0,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":0,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":0,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":0,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":0,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":0,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":0,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q4I"},{"end":"2011-03-31","val":0,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":0,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-12-31","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-06-30","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":0,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":0,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":0,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":0,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":0,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":0,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":0,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":0,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":0,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":0,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":0,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":0,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"}]}},"PreferredStockValueOutstanding":{"label":"Preferred Stock, Value, Outstanding","description":"Value of all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by shareholders, which is net of related treasury stock. May be all or a portion of the number of preferred shares authorized. These shares represent the ownership interest of the preferred shareholders.","units":{"USD":[{"end":"2017-12-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":0,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":0,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":0,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":0,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":0,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":0,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":0,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":0,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":0,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":0,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":0,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":0,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":0,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":0,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":0,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":0,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":0,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":0,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":0,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":0,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":0,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":0,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":0,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":0,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"PrepaidExpenseCurrentAndNoncurrent":{"label":"Prepaid Expense","description":"Carrying amount as of the balance sheet date of expenditures made in advance of when the economic benefit of the cost will be realized, and which will be expensed in future periods with the passage of time or when a triggering event occurs.","units":{"USD":[{"end":"2013-12-31","val":3300000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-12-31","val":3900000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":3900000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":3900000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":3900000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":3900000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":4700000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":4100000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":3100000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":4400000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":4400000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10"},{"end":"2015-12-31","val":4400000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2015-12-31","val":4400000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2015-12-31","val":4400000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28","frame":"CY2015Q4I"},{"end":"2016-03-31","val":3500000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2016-06-30","val":3300000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09","frame":"CY2016Q2I"},{"end":"2016-09-30","val":2500000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03","frame":"CY2016Q3I"},{"end":"2016-12-31","val":2000000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-12-31","val":2000000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-12-31","val":2000000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-12-31","val":2000000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07","frame":"CY2016Q4I"},{"end":"2017-03-31","val":1800000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08","frame":"CY2017Q1I"},{"end":"2017-06-30","val":2200000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09","frame":"CY2017Q2I"},{"end":"2017-09-30","val":1700000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07","frame":"CY2017Q3I"}]}},"PriceRiskCashFlowHedgeAssetAtFairValue":{"label":"Price Risk Cash Flow Hedge Asset, at Fair Value","description":"Fair value as of the balance sheet date of all price risk derivative assets designated as cash flow hedging instruments.","units":{"USD":[{"end":"2010-12-31","val":300000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2010-12-31","val":300000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":300000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2011-06-30","val":200000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":0,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":100000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q4I"},{"end":"2011-12-31","val":100000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2012-03-31","val":800000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2013-03-31","val":400000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":2100000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":1400000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"}]}},"PriceRiskCashFlowHedgeDerivativeAtFairValueNet":{"label":"Price Risk Cash Flow Hedge Derivative, at Fair Value, Net","description":"Fair value as of the balance sheet date of all price risk derivatives designated as cash flow hedging instruments.","units":{"USD":[{"end":"2013-09-30","val":800000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"}]}},"PriceRiskCashFlowHedgeLiabilityAtFairValue":{"label":"Price Risk Cash Flow Hedge Liability, at Fair Value","description":"Fair value as of the balance sheet date of all price risk derivative liabilities designated as cash flow hedging instruments.","units":{"USD":[{"end":"2013-09-30","val":600000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"}]}},"ProceedsAndExcessTaxBenefitFromSharebasedCompensation":{"label":"Proceeds and Excess Tax Benefit from Share-based Compensation","description":"The aggregate cash inflow comprised of the amount received from (a) employees to acquire the entity's shares under incentive awards, including stock option exercises and restricted stock arrangements, and (b) the excess tax benefit arising from such transactions.","units":{"USD":[{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2018"}]}},"ProceedsFromDivestitureOfBusinessesNetOfCashDivested":{"label":"Proceeds from Divestiture of Businesses, Net of Cash Divested","description":"This element represents the cash inflow during the period from the sale of a component of the entity.","units":{"USD":[{"start":"2008-08-01","end":"2008-08-31","val":15000000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2008-08-01","end":"2008-08-31","val":15000000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2008-08-01","end":"2008-08-31","val":15000000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2008-08-01","end":"2008-08-31","val":15000000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2008-08-01","end":"2008-08-31","val":15000000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2008-08-01","end":"2008-08-31","val":15000000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2008-08-01","end":"2008-08-31","val":15000000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2008Q3I"},{"start":"2011-04-01","end":"2011-06-30","val":15000000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":15000000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-04-01","end":"2011-06-30","val":15000000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-04-01","end":"2011-06-30","val":15000000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2011-04-01","end":"2011-06-30","val":15000000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":15000000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-04-01","end":"2011-06-30","val":15000000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-04-01","end":"2011-06-30","val":15000000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011Q2"},{"start":"2011-07-01","end":"2011-09-30","val":48800000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":15000000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-10-01","end":"2011-10-31","val":48800000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2012-01-01","end":"2012-12-31","val":48800000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"}]}},"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":114900000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":147800000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-12-31","val":147800000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":147800000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":147800000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2020-01-01","end":"2020-09-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-09-30","val":12756000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":12756000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":26956000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":26956000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":26956000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-09-30","val":0,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-09-30","val":97133000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":97309000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"ProceedsFromIssuanceOfLongTermDebt":{"label":"Proceeds from Issuance of Long-term Debt","description":"The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":247890000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":247890000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":247890000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":157500000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":157500000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":157500000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":356965000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"ProceedsFromIssuanceOfOtherLongTermDebt":{"label":"Proceeds from Issuance of Other Long-term Debt","description":"Amount of cash inflow from issuance of long-term debt classified as other.","units":{"USD":[{"start":"2012-01-01","end":"2012-12-31","val":157500000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014"},{"start":"2017-01-01","end":"2017-12-31","val":198000000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2018"}]}},"ProceedsFromIssuanceOrSaleOfEquity":{"label":"Proceeds from Issuance or Sale of Equity","description":"The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":9243000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":818000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":109722000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":109722000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":109801000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":109801000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":1331000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":1775000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":1775000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":1829000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":1829000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":1829000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":142917000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":142917000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":142917000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":1742000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":1742000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":1990000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":1990000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":2102000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":2102000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":2151000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":2151000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":2151000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":2151000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":1329000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":1329000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":1451000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":1451000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":1599000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":1599000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":1712000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":1712000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":1712000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":1712000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":946000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":946000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":946000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":946000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":946000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":946000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-09-30","val":946000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":946000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":950000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":950000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":950000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":950000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":824000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":824000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":824000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":824000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":824000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":824000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":824000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":824000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":824000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":824000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":302000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":302000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":302000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":302000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":302000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":39381000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":39244000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":39180000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":39179000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":708000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":708000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":708000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":708000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":709000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":709000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":709000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":709000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-09-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2019"}]}},"ProceedsFromLinesOfCredit":{"label":"Proceeds from Lines of Credit","description":"Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":102640000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":102640000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":39400000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":39400000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":39400000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":371300000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":70300000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":265600000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":265600000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":120600000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":568200000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":568200000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-09-30","val":203600000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":968500000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":225600000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":225600000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":622500000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":622500000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":115300000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":115300000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":115300000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":257100000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":257100000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":195800000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":639000000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":356900000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":487400000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":487400000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":103400000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":103400000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":180500000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":258200000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":281100000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":15000000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":43000000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":300000000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":349000000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":404700000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":35100000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":35100000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":122300000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":122300000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":192300000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":192300000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":306800000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":306800000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":132000000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":132000000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":227000000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":227000000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":315000000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":315000000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":381000000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":381000000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":50000000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":50000000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":50000000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":50000000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":71000000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":71000000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":107000000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":107000000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":57000000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":57000000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":123000000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":123000000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":195000000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":195000000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":335000000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":335000000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":335000000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":122000000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":122000000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":482000000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":482000000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":679000000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":679000000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":841000000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":841000000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":121000000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":121000000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":210000000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":334000000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":672000000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":128000000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"ProceedsFromRepaymentsOfDebt":{"label":"Proceeds from (Repayments of) Debt","description":"The net cash inflow or outflow in aggregate debt due to repayments and proceeds from additional borrowings.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":-6300000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":47300000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":-99900000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-09-30","val":-99900000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-12-31","val":-180700000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2009-01-01","end":"2009-12-31","val":-180700000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2010"}]}},"ProceedsFromSaleOfOilAndGasPropertyAndEquipment":{"label":"Proceeds from Sale of Oil and Gas Property and Equipment","description":"The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations.","units":{"USD":[{"end":"2016-04-15","val":46900000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-15","val":46900000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-15","val":46900000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-15","val":46900000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-15","val":46900000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-15","val":46900000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-15","val":46900000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"ProceedsFromSaleOfPropertyPlantAndEquipment":{"label":"Proceeds from Sale of Property, Plant, and Equipment","description":"The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":144000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":52000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":4589000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":4589000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":31083000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":31083000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":52000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":97000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":97000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":133000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":133000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":133000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":133000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":133000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":133000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":13000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":13000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":51000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":51000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":6084000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":6084000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":50284000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":50284000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":50284000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":50284000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":532000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":532000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":284000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":284000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":523000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":523000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":528000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":528000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":528000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":528000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":999000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":999000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":999000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":6841000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":6841000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":6841000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-09-30","val":6990000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":6990000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":6991000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":6991000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":6991000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":6991000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":35000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":35000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":35000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":35000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":35000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":35000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":145535000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":145535000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":145035000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":145035000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":946000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":977000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":1164000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":4876000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":432000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":460000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":653000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":702000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":26969000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":26969000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":26924000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":26924000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":27940000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":27940000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":27673000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":27673000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-91000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":-91000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-96000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":-96000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":-96000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":-96000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":-96000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":-96000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":4752000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":4752000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":4752000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":4752000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":4777000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":4777000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-06-30","val":2532000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":2532000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":4415000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":4415000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":4347000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":4300000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2022-01-01","end":"2022-12-31","val":4300000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-12-31","val":4400000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":4347000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":0,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":0,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":713000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":5730000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"ProceedsFromStockOptionsExercised":{"label":"Proceeds from Stock Options Exercised","description":"Amount of cash inflow from exercise of option under share-based payment arrangement.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":300000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":800000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":900000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":2100000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":2100000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":700000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":1000000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":1000000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":1100000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":1100000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":1200000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":1200000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":1200000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":1200000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":300000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":300000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":400000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":400000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":500000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":500000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":600000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":600000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":600000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":600000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2021-01-01","end":"2021-06-30","val":0,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":0,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-06-30","val":39000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":39000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":39000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":39000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":39000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":39000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-06-30","val":0,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"PropertyPlantAndEquipmentGross":{"label":"Property, Plant and Equipment, Gross","description":"Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.","units":{"USD":[{"end":"2012-12-31","val":5192793000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":5192793000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-12-31","val":5714099000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":5714099000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":5714099000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-12-31","val":5934155000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":5934155000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-12-31","val":6035757000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"},{"end":"2017-12-31","val":712166000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-12-31","val":986100000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":986100000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":986100000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":986100000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":986100000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":1074453000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":1144217000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":1193671000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":1247717000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":1247717000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":1247717000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":1247717000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":1247717000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":1298453000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":1303551000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":1323789000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":1343373000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":1343373000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":1343373000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":1343373000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":1343373000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":1375961000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":1402202000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":1476586000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":1611953000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":1611953000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":1611953000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":1611953000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":1611953000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":1651497000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":2200603000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":2345317000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":2529223000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":2529223000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":2529223000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":2529223000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":2529223000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":2638716000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":2756694000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":2861267000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":3597160000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":3597160000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":3709469000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"PropertyPlantAndEquipmentNet":{"label":"Property, Plant and Equipment, Net","description":"Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.","units":{"USD":[{"end":"2009-12-31","val":1315964000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":1315964000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":1315964000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":1315964000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":1397083000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":1467369000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":1467369000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":1572845000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":1572845000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":1572845000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":1572845000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":1572845000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":1652851000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":1713190000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":1835609000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":1867766000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":1867766000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":1867766000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":1867766000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":1867766000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":1987848000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":2122938000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":2264303000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":2345020000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":2345020000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":2345020000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":2345020000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q4I"},{"end":"2013-03-31","val":2428970000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":2523091000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":2572486000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":2539646000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":2539646000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":2588817000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":2588817000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":2588817000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q4I"},{"end":"2014-03-31","val":2576862000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":2625067000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":2614465000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":2661785000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":2536742000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":2095037000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":2095037000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":2095037000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":2095037000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":1556380000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":1287572000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":962576000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":457903000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":457903000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":387106000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":495397000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":495397000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":495397000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":495397000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":493927000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":553055000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":629945000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":701296000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":701296000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":701296000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":701296000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":701296000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":767844000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":813579000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":838097000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":866989000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":866989000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":866989000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":866989000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":866989000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":798694000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":529715000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":535959000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":542094000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":542094000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":542094000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":542094000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":542094000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":561270000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":571453000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":629764000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":741968000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":741968000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":741968000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":741968000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":741968000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":760339000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":1282984000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":1386178000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":1525179000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":1525179000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":1525179000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":1525179000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":1525179000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":1590654000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":1658759000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":1710126000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":2373919000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":2373919000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":2394105000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"PropertyPlantAndEquipmentOther":{"label":"Property, Plant and Equipment, Other, Gross","description":"Amount before accumulated depreciation, depletion and amortization of other physical assets used in the normal conduct of business to produce goods and services and not intended for resale.","units":{"USD":[{"end":"2009-12-31","val":3530110000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":3530110000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":3530110000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":3530110000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":3689276000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":3800736000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":3800736000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":3951107000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":3951107000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":3951107000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":3951107000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":3951107000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":4084463000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":4201003000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":4376222000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":4466845000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":4466845000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":4466845000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":4466845000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":4466845000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":4648687000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":4845484000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":5046268000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":5192793000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":5192793000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":5192793000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":5192793000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q4I"},{"end":"2013-03-31","val":5337272000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":5491252000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":5607100000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":5714099000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":5714099000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":5714099000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":5714099000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":5714099000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q4I"},{"end":"2014-03-31","val":5813305000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":5813305000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":5923457000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":5923457000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":5863650000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":5934155000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":5934155000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":5934155000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q4I"},{"end":"2015-03-31","val":5958840000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":5992080000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":6023634000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":6035757000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":6060121000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":712166000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":712166000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":712166000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q4I"},{"end":"2018-03-31","val":723828000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":796052000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":891708000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"}]}},"PropertyPlantAndEquipmentUsefulLifeMaximum":{"label":"Property, Plant and Equipment, Useful Life, Maximum (Deprecated 2012-01-31)","description":"The maximum useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.","units":{"pure":[{"start":"2011-01-01","end":"2011-06-30","val":20,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"}],"Y":[{"start":"2011-01-01","end":"2011-12-31","val":20,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":20,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"}],"Year":[{"start":"2011-01-01","end":"2011-09-30","val":20,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"}]}},"PropertyPlantAndEquipmentUsefulLifeMinimum":{"label":"Property, Plant and Equipment, Useful Life, Minimum (Deprecated 2012-01-31)","description":"The minimum useful life of long lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.","units":{"pure":[{"start":"2011-01-01","end":"2011-06-30","val":2,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"}],"Y":[{"start":"2011-01-01","end":"2011-12-31","val":2,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":2,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"}],"Year":[{"start":"2011-01-01","end":"2011-09-30","val":2,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"}]}},"PurchaseObligation":{"label":"Purchase Obligation","description":"Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.","units":{"USD":[{"end":"2014-06-30","val":37000000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":37000000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":36300000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2015-06-30","val":39000000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":39000000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"}]}},"ReceivablesFairValueDisclosure":{"label":"Receivables, Fair Value Disclosure","description":"Fair value portion of receivables, including, but not limited to, trade account receivables, note receivables, and loan receivables.","units":{"USD":[{"end":"2013-12-31","val":100000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":100000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013Q4I"},{"end":"2014-12-31","val":1000000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014Q4I"}]}},"RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty":{"label":"Related Party Transaction, Expenses from Transactions with Related Party","description":"Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":600000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":600000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":600000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":600000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":600000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":600000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":600000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":600000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":600000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":600000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":600000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":600000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":600000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":600000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":600000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":600000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":600000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"start":"2014-01-01","end":"2014-12-31","val":600000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":500000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"start":"2015-01-01","end":"2015-12-31","val":500000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"start":"2015-01-01","end":"2015-12-31","val":500000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2015"}]}},"ReorganizationItems":{"label":"Reorganization Items","description":"Total amount of reorganization items.","units":{"USD":[{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-12-31","val":6565000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":10429000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"}]}},"ReorganizationValue":{"label":"Reorganization Value","description":"Amount attributed to the reconstituted entity, as well as the expected net realizable value of those assets that will be disposed before reconstitution occurs.","units":{"USD":[{"end":"2016-04-22","val":614709000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":614709000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":614709000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":614709000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":614709000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":614709000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":614709000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"RepaymentsOfLinesOfCredit":{"label":"Repayments of Lines of Credit","description":"Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.","units":{"USD":[{"start":"2012-01-01","end":"2012-12-31","val":331900000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":195300000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":195300000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":447600000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":447600000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-09-30","val":764900000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":396900000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":396900000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":82600000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":82600000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":82600000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":221100000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":221100000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":159800000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":702000000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":419900000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":555100000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":555100000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":53700000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":53700000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":105800000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":153500000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":153500000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":69000000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":287000000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":297000000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":529700000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":55100000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":55100000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":113300000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":113300000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":141300000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":141300000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":184800000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":184800000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":96000000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":96000000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":149000000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":149000000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":228000000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":228000000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":297000000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":297000000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":39000000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":39000000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":59000000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":59000000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":97000000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":97000000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":156000000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":156000000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":87000000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":87000000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":155000000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":155000000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":227000000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":227000000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":338000000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":338000000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":338000000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":149000000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":149000000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":215000000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":215000000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":426000000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":426000000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":526000000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":526000000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":104000000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":104000000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":176000000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":378000000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":492000000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":254000000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"RestrictedCash":{"label":"Restricted Cash","description":"Amount of cash 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.","units":{"USD":[{"end":"2017-03-31","val":832000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1I"},{"end":"2017-06-30","val":179000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2I"},{"end":"2017-09-30","val":220000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3I"},{"end":"2017-12-31","val":220000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":220000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":220000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":220000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":220000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":220000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2018Q4I"},{"end":"2022-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"}]}},"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":"2014-06-30","val":12500000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":12500000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":34500000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"}]}},"RestrictedCashAndCashEquivalentsNoncurrent":{"label":"Restricted Cash and Cash Equivalents, Noncurrent","description":"Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as noncurrent. 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":"2010-12-31","val":1300000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":1300000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":1300000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-06-30","val":1300000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":1300000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":1300000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":1300000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":1300000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":1300000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":1300000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":1000000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":1000000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":1000000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":1000000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":1000000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":1000000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":1000000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":1000000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":1000000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":1000000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":1000000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":1000000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":1000000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":1000000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":1000000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":1000000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":1000000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":1000000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":1000000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":1000000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":1000000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":1000000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":1000000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":1000000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":1000000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":1000000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":1000000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":1000000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":1000000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":1000000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":1000000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":1000000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":1000000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":1000000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":1000000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":1000000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"}]}},"RestructuringCharges":{"label":"Restructuring Charges","description":"Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.","units":{"USD":[{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2016-01-01","end":"2016-03-31","val":5422000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"}]}},"ResultsOfOperationsExpenseOther":{"label":"Results of Operations, Expense, Other","description":"Other costs for oil and gas producing activities.","units":{"USD":[{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":646000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":646000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":519000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":519000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":-127000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":-127000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":613000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":613000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":93000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":93000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":628000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":628000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":8000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":8000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":8000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":8000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":8000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":8000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":13000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":13000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":90000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":90000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":76000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":76000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":512000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":512000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":423000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":423000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":514000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":514000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":514000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":647000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":647000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":649000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":649000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":2000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":2000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":933000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":933000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":284000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":284000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":1655000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":1655000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":779000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":779000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":1590000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":811000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":2263000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":672000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":2694000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":610000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"ResultsOfOperationsProductionOrLiftingCosts":{"label":"Results of Operations, Production or Lifting Costs","description":"Production (lifting) costs from oil and gas producing activities, including but not limited to lease operating expense, production and ad valorem taxes, and transportation expense.","units":{"USD":[{"start":"2018-01-01","end":"2018-03-31","val":4961000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":8721000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":3760000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":12927000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":4207000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2019-01-01","end":"2019-03-31","val":4531000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":4531000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":9567000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":9567000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":5035000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":5035000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":15074000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":15074000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":5507000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":5507000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2020-01-01","end":"2020-03-31","val":5812000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":5812000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":10812000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":10812000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":5000000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":5000000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":16023000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":16023000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":5211000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":5211000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2021-01-01","end":"2021-03-31","val":6274000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":6274000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":11789000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":11789000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":5515000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":5515000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":18767000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":18767000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":6978000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":6978000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":27206000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":9125000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":9125000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":19395000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":19395000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":10270000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":10270000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":37095000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":37095000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":17701000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":17701000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":55329000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":20560000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":20560000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":39740000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":19180000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":62417000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":22678000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":87368000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":31825000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"ResultsOfOperationsTransportationCosts":{"label":"Results of Operations, Transportation Costs","description":"Includes the cost to prepare and move liquid hydrocarbons and natural gas to their points of sale.","units":{"USD":[{"start":"2017-01-01","end":"2017-09-30","val":14067000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":4921000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":19360000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":5025000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":10446000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":5421000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":16585000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":16585000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":6138000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":6138000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":23848000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":23848000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":6406000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":6406000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":13135000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":13135000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":6728000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":6728000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":19917000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":19917000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":6782000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":6782000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":26968000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":26968000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":6643000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":6643000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":11197000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":11197000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":4554000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":4554000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":16291000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":16291000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":5094000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":5094000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":20649000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":20649000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":5056000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":5056000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":11262000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":11262000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":6206000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":6206000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":17175000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":17175000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":5913000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":5913000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":24145000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":24145000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":24145000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":6352000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":6352000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":13121000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":13121000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":6769000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":6769000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":22784000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":22784000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":9662000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":9662000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":32989000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":32989000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":11520000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":11520000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":23292000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":11771000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":37001000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":13710000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":59032000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":35199000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"RetainedEarningsAccumulatedDeficit":{"label":"Retained Earnings (Accumulated Deficit)","description":"The cumulative amount of the reporting entity's undistributed earnings or deficit.","units":{"USD":[{"end":"2009-12-31","val":136358000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":136358000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":136358000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":136358000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":163022000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":172352000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":172352000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":182652000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":182652000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":182652000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":182652000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":182652000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":202833000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":243861000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":260837000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":281473000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":281473000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":281473000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":281473000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":281473000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":285043000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":288071000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":291193000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":302412000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":302412000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":302412000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":302412000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":302412000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":317686000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":309621000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":316343000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":325229000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":283380000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":283380000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":283380000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":315244000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":315244000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":315244000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":315244000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":315244000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":288793000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":320686000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":296831000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":327513000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":329987000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":31817000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":31817000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":31817000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":31817000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":31817000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":-450145000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":-743012000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":-1097600000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":-1627039000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":-1627039000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":-1735342000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":-84317000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":-84317000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":-84317000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":-84317000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":-75851000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":-73530000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":-66450000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":-9702000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":-9702000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":-9702000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":-9702000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":-9702000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":6351000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":71055000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":98706000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":104954000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":104954000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":104954000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":104954000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":104954000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":99096000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":-206880000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":-213776000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":-204428000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":-204428000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":-204428000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":-204428000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":-204428000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":-176048000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":-195999000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":-231942000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":-117669000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":-117669000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":-117669000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":-117669000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":-117669000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":-181924000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":-93134000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":49407000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":222768000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":222768000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":222768000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":222768000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":222768000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":317260000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":342197000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":337426000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":520484000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":520484000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":504956000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"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":"2017-01-01","end":"2017-09-30","val":137216000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":49019000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":195910000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":52752000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":104099000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":51347000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":169134000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":169134000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":65034000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":65034000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":257286000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":257286000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":72064000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":72064000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":146768000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":146768000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":74703000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":74703000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":218781000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":218781000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":72014000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":72014000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":288631000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":288631000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":53377000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":53377000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":78222000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":78222000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":24846000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":24846000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":123921000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":123921000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":45699000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":45699000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":177386000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":177386000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":86741000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":86741000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":156602000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":156602000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":69861000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":69861000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":255850000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":255850000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":99249000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":99249000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":407200000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":407200000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":407200000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":129656000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":129656000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":312261000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":312261000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":182605000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":182605000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":554442000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":554442000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":242181000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":242181000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":753420000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":753420000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":139954000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":139954000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":266354000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":126400000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":440317000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":173963000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":652358000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":256680000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"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":"2008-01-01","end":"2008-12-31","val":820815000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":159280000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":82921000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":255543000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":255543000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":96263000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":96263000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":370445000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":370445000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":109846000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":216746000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":216746000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":106900000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":106900000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":322392000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":322392000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":322392000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":105646000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":105646000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":105646000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":438429000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":438429000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":438429000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":144078000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":144078000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":301506000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":301506000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":157428000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":157428000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":444038000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":444038000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":142532000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":142532000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":599131000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":599131000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":599131000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":597809000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":135878000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":135878000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":270635000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":270635000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":134757000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":134757000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":399385000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":399385000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":128750000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":128750000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":557290000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":557290000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":561486000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":561486000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":146237000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":146237000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":146291000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":288703000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":288703000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":290368000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":142466000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":142466000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":144077000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":441704000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":441301000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":153001000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":150933000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":587713000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":584401000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":584401000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":584401000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":143681000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":144180000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":144180000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":299402000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":300174000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":300174000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":155721000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":155994000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":155994000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":438968000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":438968000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":138794000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":138794000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":549456000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":549456000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":68337000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":68337000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":134506000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":66169000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":194622000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":60116000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":244721000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":34272000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"}]}},"RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability":{"label":"Right-of-Use Asset Obtained in Exchange for Operating Lease Liability","description":"Amount of increase in right-of-use asset obtained in exchange for operating lease liability.","units":{"USD":[{"start":"2019-04-01","end":"2019-06-30","val":11500000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2"},{"start":"2020-01-01","end":"2020-12-31","val":1751000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":993000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":5758000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":6541000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":8779000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":8779000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":1187000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":3902000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-09-30","val":4453000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-12-31","val":5342000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":5342000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":6134000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"ShareBasedCompensation":{"label":"Share-based Payment Arrangement, Noncash Expense","description":"Amount of noncash expense for share-based payment arrangement.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":11631000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":4645000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-09-30","val":6854000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":6854000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":9232000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":9232000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":2364000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":4905000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":4905000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":7550000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":7550000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":7550000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":10256000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":10256000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":10256000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":2684000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":2684000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":5939000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":5939000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":9281000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":9281000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":12625000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":12625000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":12625000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":12955000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":3629000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":3629000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":7181000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":7181000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":10562000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":10562000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":13476000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":13476000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":13795000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":13795000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":3015000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":3015000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":3015000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":6018000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":6018000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":6018000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-09-30","val":8454000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":8454000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":10478000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":10099000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":10099000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":10099000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":2054000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":1784000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":1784000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":3953000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":3683000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":3683000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-09-30","val":5571000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":5571000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":7309000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":7309000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":879000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":879000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":2153000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":3288000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":4435000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":770000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":1503000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":3136000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":4538000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":6849000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":1359000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":1359000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":2675000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":2675000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":4240000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":4240000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":5980000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":5980000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":1692000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":1692000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":3339000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":3339000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":5091000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":5091000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":6148000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":6148000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":1260000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":1260000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":2437000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":2437000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":3503000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":3503000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":4557000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":4557000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":1070000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":1070000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":2260000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":2260000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":3450000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":3450000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":4645000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":4645000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":4645000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":1047000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":1047000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":2714000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":2714000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":3901000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":3901000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":5086000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":5086000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":1124000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":1124000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":2575000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":4043000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":5526000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":1830000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period","description":"The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.","units":{"shares":[{"start":"2009-01-01","end":"2009-12-31","val":51750,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":46029,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":46029,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":-26558,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":-30542,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":49661,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":49661,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":9053,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":35256,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":67943,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":107182,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":3235,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":16271,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":56663,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":106903,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":106903,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period","description":"The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).","units":{"shares":[{"start":"2009-01-01","end":"2009-12-31","val":433210,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":388650,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":388650,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":416800,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":490050,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":499050,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":499050,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":474200,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":514850,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":529050,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":543800,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":575080,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":630930,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":637430,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":869430,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":869430,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value","description":"The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).","units":{"USD/shares":[{"start":"2009-01-01","end":"2009-12-31","val":12.48,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":25.41,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":25.41,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":42.29,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":40.5,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":40.28,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":40.28,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":32.62,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":31.78,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":31.5,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":31.12,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":15.47,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":15.36,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":15.33,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":14.86,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":14.86,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number","description":"The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.","units":{"shares":[{"end":"2008-12-31","val":586325,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2008Q4I"},{"end":"2009-12-31","val":703856,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2009-12-31","val":703856,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2009Q4I"},{"end":"2010-12-31","val":734286,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":734286,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":734286,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2010-12-31","val":734286,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010Q4I"},{"end":"2011-06-30","val":790482,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":856238,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":834703,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":834703,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":834703,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":834703,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":834703,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":990034,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":964531,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":926345,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":896164,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":896164,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":896164,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":896164,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":896164,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":896164,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":1129637,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":1143918,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":1092692,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":1267110,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":1267110,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013Q4I"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value","description":"Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.","units":{"USD/shares":[{"end":"2008-12-31","val":42.78,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2008Q4I"},{"end":"2009-12-31","val":24.15,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2009-12-31","val":24.15,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2009Q4I"},{"end":"2010-12-31","val":22.87,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":22.87,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":22.87,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2010-12-31","val":22.87,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010Q4I"},{"end":"2011-06-30","val":32.13,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":31.93,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":31.89,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":31.89,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":31.89,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":31.89,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":31.89,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":33.85,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":33.86,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":33.69,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":33.38,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":33.38,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":33.38,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":33.38,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":33.38,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":33.38,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":24.34,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":23.74,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":23.45,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":21.54,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":21.54,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013Q4I"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period","description":"The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.","units":{"shares":[{"start":"2009-01-01","end":"2009-12-31","val":263929,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":312191,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":312191,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":-334046,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":-337556,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":348972,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":348972,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":309816,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":349766,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":369465,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":375157,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":338372,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":366905,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":384239,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":391581,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":391581,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value","description":"The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.","units":{"USD/shares":[{"start":"2009-01-01","end":"2009-12-31","val":42.92,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":28.75,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":28.75,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":24.69,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":24.68,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":24.84,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":24.84,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":26.73,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":26.23,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":26.48,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":26.62,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":33.14,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":32.85,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":32.74,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":32.65,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":32.65,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate","description":"The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.","units":{"pure":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":0,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":0,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":0,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":0,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedTerm":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term (Deprecated 2012-01-31)","description":"The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.","units":{"pure":[{"start":"2010-01-01","end":"2010-06-30","val":4.3,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":2,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2011-01-01","end":"2011-06-30","val":3.8,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":2,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2"}],"Y":[{"start":"2009-01-01","end":"2009-12-31","val":4.5,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":4.3,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":3.9,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-12-31","val":3.8,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":4.4,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"}],"Year":[{"start":"2010-01-01","end":"2010-09-30","val":4.3,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":3.8,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate","description":"The risk-free interest rate assumption that is used in valuing an option on its own shares.","units":{"pure":[{"start":"2009-01-01","end":"2009-12-31","val":0.018,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0.021,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":0.006,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":0.021,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":0.021,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":0.021,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0.019,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0.019,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":0.019,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":0.005,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":0.019,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":0.019,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":0.019,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":0.019,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":0.019,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":0.019,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":0.008,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":0.008,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":0.008,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":0.008,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":0.008,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":0.008,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":0.008,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":0.008,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":0.008,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":0.008,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate","description":"Rate of weighted-average expected volatility for award under share-based payment arrangement.","units":{"pure":[{"start":"2009-01-01","end":"2009-12-31","val":0.505,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0.63,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":0.684,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":0.63,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":0.628,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":0.628,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0.588,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0.588,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":0.588,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":0.586,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":0.588,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":0.588,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":0.588,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":0.588,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":0.588,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":0.588,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":0.612,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":0.612,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":0.612,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":0.612,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":0.612,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":0.612,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":0.612,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":0.612,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":0.612,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":0.612,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate","description":"The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.","units":{"pure":[{"end":"2011-12-31","val":0.1,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011Q4I"},{"end":"2012-12-31","val":0.1,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012Q4I"},{"end":"2013-12-31","val":0.1,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":0.1,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013Q4I"},{"end":"2014-12-31","val":0.1,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014Q4I"},{"end":"2015-12-31","val":0.1,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant","description":"The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.","units":{"shares":[{"end":"2011-12-31","val":2349146,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011Q4I"},{"end":"2018-12-31","val":253293,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2018Q4I"},{"end":"2019-12-31","val":1066770,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2019Q4I"},{"end":"2020-12-31","val":726723,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020Q4I"},{"end":"2021-12-31","val":349265,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021Q4I"},{"end":"2022-12-31","val":140446,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2022Q4I"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number","description":"The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.","units":{"shares":[{"end":"2009-12-31","val":790394,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009Q4I"},{"end":"2010-12-31","val":749447,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2010-12-31","val":749447,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010Q4I"},{"end":"2011-06-30","val":736950,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":731300,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":734985,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":734985,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":1065306,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":1035896,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":1013829,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":990957,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012Q4I"},{"end":"2013-03-31","val":1263903,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":1276225,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":1266025,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":1201971,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":1201971,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013Q4I"},{"end":"2014-03-31","val":1368912,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":1368912,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":1327449,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":1327449,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":1295616,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":1230019,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014Q4I"},{"end":"2015-12-31","val":1330390,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price","description":"The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.","units":{"USD/shares":[{"end":"2009-12-31","val":31,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009Q4I"},{"end":"2010-12-31","val":32.04,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2010-12-31","val":32.04,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010Q4I"},{"end":"2011-06-30","val":30.87,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":30.96,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":31.07,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":31.07,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":31.45,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":31.87,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":32.16,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":32.39,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012Q4I"},{"end":"2013-03-31","val":32.49,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":32.44,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":32.59,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":32.93,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":32.93,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013Q4I"},{"end":"2014-03-31","val":33.52,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":33.52,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":33.87,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":33.87,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":33.98,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":34.14,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014Q4I"},{"end":"2015-12-31","val":34.02,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value","description":"Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":2600000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":4100000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":4200000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":4200000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":4200000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":4200000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":4200000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":400000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":700000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":800000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":900000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":900000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":900000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":900000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price","description":"Weighted average price of options that were either forfeited or expired.","units":{"USD/shares":[{"start":"2010-01-01","end":"2010-12-31","val":44.65,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":55.19,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-06-30","val":47.15,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":41.19,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":41.2,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":45.01,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":44.9,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":35.39,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":31.51,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":31.51,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":22.32,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":22.32,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":23.24,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":23.24,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":25.2,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-12-31","val":27.68,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":34.15,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period","description":"The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.","units":{"shares":[{"start":"2009-01-01","end":"2009-12-31","val":77619,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":36983,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":36983,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":-67529,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":-67529,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":67529,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":67529,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":17199,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":23733,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":32610,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":42047,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":22695,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":23026,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":33226,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":85403,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":85403,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":14264,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":14264,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":58694,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":58694,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":90527,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-12-31","val":156124,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":1800,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures","description":"Net number of share options (or share units) granted during the period.","units":{"shares":[{"start":"2009-01-01","end":"2009-12-31","val":273400,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":273463,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":273463,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":307394,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":307394,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":307394,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":307394,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":323439,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":336092,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":336092,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":336092,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":0,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value","description":"The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.","units":{"USD/shares":[{"start":"2009-01-01","end":"2009-12-31","val":6.32,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":12.6,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":11.12,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":12.6,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":12.6,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":12.6,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":19.33,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":19.17,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":12.24,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":19.17,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":19.17,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":19.17,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":19.17,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":19.17,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":15.96,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":32.39,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":32.39,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":15.71,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":15.71,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":15.71,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":15.71,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":0,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value","description":"Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.","units":{"USD":[{"end":"2011-06-30","val":11300000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":3200000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":6400000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011Q4I"},{"end":"2012-03-31","val":5700000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":1200000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":1700000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":200000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012Q4I"},{"end":"2013-03-31","val":100000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number","description":"Number of options outstanding, including both vested and non-vested options.","units":{"shares":[{"end":"2008-12-31","val":1119469,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2008Q4I"},{"end":"2009-12-31","val":1289194,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2009-12-31","val":1289194,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2009Q4I"},{"end":"2010-06-30","val":1500000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2I"},{"end":"2010-09-30","val":1400000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3I"},{"end":"2010-12-31","val":1361779,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":1361779,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":1361779,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2010-12-31","val":1361779,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010Q4I"},{"end":"2011-03-31","val":1500000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1I"},{"end":"2011-06-30","val":1383331,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2011-06-30","val":1400000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2I"},{"end":"2011-09-30","val":1377681,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2011-09-30","val":1400000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3I"},{"end":"2011-12-31","val":1375281,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":1375281,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":1375281,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":1375281,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":1375281,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2011-12-31","val":1361779,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2011-12-31","val":1361779,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011Q4I"},{"end":"2012-03-31","val":1654405,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2012-03-31","val":1700000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1I"},{"end":"2012-06-30","val":1630533,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":1608466,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":1585594,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":1585594,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":1585594,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":1585594,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":1585594,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":1585594,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2012-12-31","val":1585594,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012Q4I"},{"end":"2013-03-31","val":1562899,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":1562568,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":1552368,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":1488314,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":1488314,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":1488314,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":1488314,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":1488314,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":1488314,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":1488314,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":1488314,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":1474050,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":1474050,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":1429620,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":1429620,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":1397787,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":1332190,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":1332190,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-12-31","val":1330390,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price","description":"Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.","units":{"USD/shares":[{"end":"2009-12-31","val":29.72,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2009-12-31","val":29.72,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2009Q4I"},{"end":"2010-06-30","val":29.18,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2I"},{"end":"2010-09-30","val":29,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3I"},{"end":"2010-12-31","val":29.67,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2010-12-31","val":29.67,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010Q4I"},{"end":"2011-03-31","val":32.93,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1I"},{"end":"2011-06-30","val":32.39,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2011-06-30","val":32.39,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2I"},{"end":"2011-09-30","val":32.44,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2011-09-30","val":32.44,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3I"},{"end":"2011-12-31","val":32.46,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":32.46,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2011-12-31","val":32.46,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2011-12-31","val":32.46,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011Q4I"},{"end":"2012-03-31","val":32.56,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2012-03-31","val":32.56,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1I"},{"end":"2012-06-30","val":32.78,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":32.97,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":33.13,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":33.13,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":33.13,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2012-12-31","val":33.13,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012Q4I"},{"end":"2013-03-31","val":32.96,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":32.96,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":33.08,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":33.38,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":33.38,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":33.38,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":33.46,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":33.46,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":33.78,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":33.78,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":33.88,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":34.02,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":34.02,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-12-31","val":34.02,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015Q4I"}]}},"ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price","description":"Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.","units":{"USD/shares":[{"end":"2008-12-31","val":33.22,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2008Q4I"},{"end":"2009-12-31","val":29.72,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009Q4I"},{"end":"2010-12-31","val":29.67,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":29.67,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":29.67,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-06-30","val":32.39,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":32.44,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":32.46,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":32.46,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":32.46,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":32.46,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q4I"},{"end":"2012-03-31","val":32.56,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-12-31","val":33.13,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":33.13,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":33.13,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q4I"},{"end":"2013-12-31","val":33.38,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":33.38,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":33.38,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":33.38,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":33.38,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q4I"}]}},"ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice":{"label":"Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price","description":"Weighted average price at which option holders acquired shares when converting their stock options into shares.","units":{"USD/shares":[{"start":"2010-01-01","end":"2010-12-31","val":18.11,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":22.61,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-06-30","val":17.02,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":15.92,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":14.7,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":13.84,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":13.84,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":0,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"}]}},"ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice":{"label":"Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price","description":"Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.","units":{"USD/shares":[{"start":"2010-01-01","end":"2010-12-31","val":25.28,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":42.56,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":32.39,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"}]}},"ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions":{"label":"Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding","description":"The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.","units":{"shares":[{"end":"2016-06-08","val":105811,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09","frame":"CY2016Q2I"}]}},"SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value","description":"Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.","units":{"USD":[{"end":"2011-06-30","val":7200000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":2300000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":4200000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011Q4I"},{"end":"2012-03-31","val":5400000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":1200000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":1700000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":200000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012Q4I"},{"end":"2013-03-31","val":100000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"}]}},"SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1":{"label":"Share-based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price","description":"Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.","units":{"USD/shares":[{"end":"2016-06-08","val":23.25,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09","frame":"CY2016Q2I"}]}},"SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm1":{"label":"Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Remaining Contractual Term (Deprecated 2012-01-31)","description":"The weighted average remaining life of the exercisable stock options as of the balance sheet date for all option plans in the customized range of exercise prices.","units":{"pure":[{"end":"2011-06-30","val":6.2,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"}],"Y":[{"end":"2011-12-31","val":5.8,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011Q4I"},{"end":"2012-03-31","val":6.5,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"}],"Year":[{"end":"2011-09-30","val":6,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"}]}},"SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds":{"label":"Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds (Deprecated 2015-01-31)","description":"The value of all consideration given or received by the Entity in the significant acquisition or disposal.","units":{"USD":[{"end":"2013-05-01","val":5800000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2013-05-01","val":5800000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2013-05-01","val":6000000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2013-05-01","val":6000000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-05-01","val":5800000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-05-01","val":6000000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-05-01","val":5800000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1I"},{"end":"2014-07-15","val":175000000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2014-07-15","val":175000000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014Q2I"}]}},"StateAndLocalIncomeTaxExpenseBenefitContinuingOperations":{"label":"State and Local Income Tax Expense (Benefit), Continuing Operations","description":"Amount of state and local current and deferred income tax expense (benefit) attributable to continuing operations.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":-2000000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":600000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":-600000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":1500000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":-1500000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":-100000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"},{"start":"2019-01-01","end":"2019-06-30","val":500000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":300000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2"},{"start":"2021-01-01","end":"2021-12-31","val":186000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":186000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":-25000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":-25000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":527000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"StockAndWarrantsIssuedDuringPeriodValuePreferredStockAndWarrants":{"label":"Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants","description":"Value of preferred stock and warrants for common stock issued.","units":{"USD":[{"end":"2016-04-22","val":15000000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":15000000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":15000000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":15000000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":15000000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":15000000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":15000000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"}]}},"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":678899000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":678899000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":678899000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":678899000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":713051000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":725439000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":725439000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":880017000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":880017000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":880017000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":880017000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":880017000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":903883000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":950199000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":971493000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":996509000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":996509000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":996509000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":996509000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":996509000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2011-12-31","val":1011351000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2011Q4I"},{"end":"2012-03-31","val":1005643000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":1013687000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":1021360000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":1036860000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":1036860000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":1036860000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":1036860000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":1036860000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":1052783000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2012-12-31","val":1052783000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2012-12-31","val":1052783000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2012-12-31","val":1052783000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2012Q4I"},{"end":"2013-03-31","val":1048286000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":1059590000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":1072083000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":1033216000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":1033216000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":1033216000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":1065350000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":1065350000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":1065350000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":1065350000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":1065350000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2013-12-31","val":1065350000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2013-12-31","val":1065350000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2013-12-31","val":1065350000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2013-12-31","val":1065350000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013Q4I"},{"end":"2014-03-31","val":1043648000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":1075541000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":1054463000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":1085145000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":1090349000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":794378000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":794378000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":794378000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":794378000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":794378000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2014-12-31","val":794378000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2014Q4I"},{"end":"2015-03-31","val":319434000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":28270000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":-324810000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":-852724000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":-852724000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":-960118000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2016-12-31","val":76055000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2016-12-31","val":76055000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2016-12-31","val":76055000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2016-12-31","val":76055000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2016Q4I"},{"end":"2017-12-31","val":193458000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":193458000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":193458000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":193458000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2017-12-31","val":193458000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2017-12-31","val":193458000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2017-12-31","val":193458000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2017-12-31","val":193458000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2017Q4I"},{"end":"2018-03-31","val":203827000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2018-03-31","val":203827000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-03-31","val":203827000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-03-31","val":203827000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q1I"},{"end":"2018-06-30","val":207443000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2018-06-30","val":207441000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-06-30","val":207443000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q2I"},{"end":"2018-09-30","val":216204000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2018-09-30","val":216204000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":274827000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":274827000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":274827000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":274827000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":274827000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2018-12-31","val":274827000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2018-12-31","val":274827000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2018-12-31","val":274827000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2018-12-31","val":274827000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2018Q4I"},{"end":"2019-03-31","val":292469000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2019-03-31","val":292469000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2019-03-31","val":292469000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2019-03-31","val":292469000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-03-31","val":292469000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-03-31","val":292469000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q1I"},{"end":"2019-06-30","val":358884000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2019-06-30","val":358884000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2019-06-30","val":358884000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-06-30","val":358884000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q2I"},{"end":"2019-09-30","val":388386000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2019-09-30","val":388386000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3I"},{"end":"2019-12-31","val":395707000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":395707000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":395707000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":395707000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":395707000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2019-12-31","val":395707000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2019-12-31","val":395707000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2019-12-31","val":395707000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2019-12-31","val":395707000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2019Q4I"},{"end":"2020-03-31","val":391101000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2020-03-31","val":391101000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2020-03-31","val":391101000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2020-03-31","val":391101000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-03-31","val":391101000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-03-31","val":391101000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q1I"},{"end":"2020-06-30","val":86351000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2020-06-30","val":86351000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2020-06-30","val":86351000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-06-30","val":86351000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q2I"},{"end":"2020-09-30","val":80602000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2020-09-30","val":80602000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3I"},{"end":"2020-12-31","val":91033000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":91033000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":91033000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":91033000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":91033000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2020-12-31","val":91033000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2020-12-31","val":91033000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2020-12-31","val":91033000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2020-12-31","val":91033000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2020-12-31","val":91033000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2020Q4I"},{"end":"2021-03-31","val":120056000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2021-03-31","val":120056000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2021-03-31","val":120056000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2021-03-31","val":120056000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-03-31","val":120056000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-03-31","val":120056000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q1I"},{"end":"2021-06-30","val":101238000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2021-06-30","val":101238000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2021-06-30","val":101238000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-06-30","val":101238000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q2I"},{"end":"2021-09-30","val":89316000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2021-09-30","val":89316000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3I"},{"end":"2021-12-31","val":292532000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":292532000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":292532000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":292532000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":292532000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2021-12-31","val":292532000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2021-12-31","val":292532000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2021-12-31","val":292532000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2021-12-31","val":292532000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021Q4I"},{"end":"2022-03-31","val":225782000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2022-03-31","val":225782000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2022-03-31","val":225782000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2022-03-31","val":225782000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-03-31","val":225782000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-03-31","val":225782000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q1I"},{"end":"2022-06-30","val":473257000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2022-06-30","val":473257000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2022-06-30","val":473257000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-06-30","val":473257000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q2I"},{"end":"2022-09-30","val":616985000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2022-09-30","val":616985000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3I"},{"end":"2022-12-31","val":791579000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":791579000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":791579000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":791579000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":791579000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2022-12-31","val":791579000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2022Q4I"},{"end":"2023-03-31","val":884305000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2023-03-31","val":884305000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2023-03-31","val":884305000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2023-03-31","val":884305000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1I"},{"end":"2023-06-30","val":910645000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2023-06-30","val":910645000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q2I"},{"end":"2023-09-30","val":1004542000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":1189328000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":1189328000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":1175164000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"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":"2007-12-31","val":836054000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2007Q4I"},{"end":"2008-12-31","val":600877000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2008-12-31","val":600877000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2008-12-31","val":600877000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2008-12-31","val":600877000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2008-12-31","val":600877000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2008Q4I"},{"end":"2009-12-31","val":678899000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":678899000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":678899000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":678899000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2009-12-31","val":678899000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2009-12-31","val":678899000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2009-12-31","val":678899000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2009-12-31","val":678899000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2009-12-31","val":678899000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2009Q4I"},{"end":"2010-06-30","val":713051000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":725439000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":725439000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":880017000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":880017000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":880017000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":880017000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":880017000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2010-12-31","val":880017000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2010-12-31","val":880017000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2010-12-31","val":880017000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2010-12-31","val":880017000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2010-12-31","val":880017000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2010-12-31","val":897068000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2010Q4I"},{"end":"2011-03-31","val":903883000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":950199000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":971493000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":996509000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":996509000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":996509000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":996509000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":996509000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2011-12-31","val":996509000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2011-12-31","val":996509000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2011-12-31","val":996509000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2011-12-31","val":996509000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2011-12-31","val":1011351000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011Q4I"},{"end":"2012-03-31","val":1005643000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":1013687000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":1021360000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":1036860000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":1036860000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":1036860000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":1036860000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":1036860000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":1036860000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2012-12-31","val":1036860000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2012-12-31","val":1052783000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2012-12-31","val":1052783000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2012-12-31","val":1052783000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":1048286000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":1059590000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":1072083000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":1033216000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":1033216000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":1033216000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":1065350000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":1065350000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":1065350000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q4I"},{"end":"2014-03-31","val":1043648000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":1075541000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":1054463000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":1085145000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"}]}},"StockIssuedDuringPeriodSharesAcquisitions":{"label":"Stock Issued During Period, Shares, Acquisitions","description":"Number of shares of stock issued during the period pursuant to acquisitions.","units":{"shares":[{"start":"2021-07-01","end":"2021-09-30","val":516675,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":516675,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":3210626,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":3210626,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":3210626,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":489,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":489,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-03-31","val":489,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2022-01-01","end":"2022-03-31","val":489,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-03-31","val":489,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q1"},{"start":"2022-04-01","end":"2022-06-30","val":5448472,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":5448472,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-04-01","end":"2022-06-30","val":5448472,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":5448472,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-12-31","val":5448961,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":5448961,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"}]}},"StockIssuedDuringPeriodSharesEmployeeBenefitPlan":{"label":"Stock Issued During Period, Shares, Employee Benefit Plan","description":"Number of shares issued during the period to an employee benefit plan, such as a defined contribution or defined benefit plan.","units":{"shares":[{"start":"2011-01-01","end":"2011-12-31","val":44258,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":44258,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":91895,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":91895,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":91895,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":140078,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":140078,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":139850,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":139850,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":352476,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":352476,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"}]}},"StockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan":{"label":"Stock Issued During Period, Shares, Employee Stock Ownership Plan","description":"Number of shares of capital stock issued (purchased by employees) in connection with an employee stock ownership plan.","units":{"shares":[{"start":"2008-01-01","end":"2008-12-31","val":39152,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":94023,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-12-31","val":94023,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-12-31","val":94023,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":94023,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":94023,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":59335,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-09-30","val":59335,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":59335,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-12-31","val":59335,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":59335,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2010-01-01","end":"2010-12-31","val":59335,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-12-31","val":59335,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":59335,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":59335,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":37068,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":37068,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":37068,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":37068,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":37068,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2011-01-01","end":"2011-12-31","val":37068000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-12-31","val":37068000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":37068,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":50987000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2011-01-01","end":"2011-12-31","val":37068,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":37068,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":50987,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":50987000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":50987000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":50987,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":50987000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-12-31","val":50987000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":50987,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":50987,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":50987,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":104890000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":104890000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":104890000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":104890,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":104890000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-12-31","val":104890000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-12-31","val":104890,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":104890000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":104890000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":104890,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":104890,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":104890,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":154665000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":154665000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":154665000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":154665000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":154665,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-12-31","val":154665,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":154665,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2014-01-01","end":"2014-12-31","val":154665,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-12-31","val":154665,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":154665,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":352476,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":352476,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":352476,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":352476,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"start":"2015-01-01","end":"2015-12-31","val":352476,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"}]}},"StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans":{"label":"Stock Issued During Period, Shares, Employee Stock Purchase Plans","description":"Number of shares issued during the period as a result of an employee stock purchase plan.","units":{"shares":[{"start":"2008-01-01","end":"2008-12-31","val":25645,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":50690,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-12-31","val":50690,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-12-31","val":50690,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":50690,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":50690,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":66564,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-09-30","val":66564,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":66564,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-12-31","val":66564,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":66564,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2010-01-01","end":"2010-12-31","val":66564,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-12-31","val":66564,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":66564,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":66564,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":49089,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":49089,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":49089,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":49089,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":49089,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2011-01-01","end":"2011-12-31","val":49089000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-12-31","val":49089000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":49089,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":42624000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2011-01-01","end":"2011-12-31","val":49089,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":49089,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":42624,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":42624000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":42624000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":42624,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":42624000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-12-31","val":42624000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":42624,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":42624,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":42624,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":72273000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":72273000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":72273000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":72273,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":72273000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-12-31","val":72273000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-12-31","val":72273,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":72273000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":72273000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":72273,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":72273,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":72273,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":71825000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":71825000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":71825000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":71825000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":71825,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-12-31","val":71825,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":71825,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2014-01-01","end":"2014-12-31","val":71825,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-12-31","val":71825,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":71825,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":87629,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":87629,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":87629,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":87629,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"start":"2015-01-01","end":"2015-12-31","val":87629,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":1403508,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020"}]}},"StockIssuedDuringPeriodSharesNewIssues":{"label":"Stock Issued During Period, Shares, New Issues","description":"Number of new stock issued during the period.","units":{"shares":[{"start":"2008-01-01","end":"2008-12-31","val":0,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":6210000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-12-31","val":6210000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-12-31","val":6210000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":6210000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":6210000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":0,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":0,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-12-31","val":4038270,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":4038270,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2010-01-01","end":"2010-12-31","val":4038270,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-12-31","val":4038270,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":4038270,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":4038270,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"},{"end":"2016-04-22","val":10000000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-04-22","val":10000000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-04-22","val":10000000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-04-22","val":10000000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-04-22","val":10000000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-04-22","val":10000000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"end":"2016-04-22","val":10000000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q1I"},{"start":"2017-01-01","end":"2017-12-31","val":1403508,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2017-01-01","end":"2017-12-31","val":1403508,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-12-31","val":1403508,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q1"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q2"},{"start":"2019-07-01","end":"2019-09-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3"},{"start":"2021-07-01","end":"2021-09-30","val":669600,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":669600,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":1222209,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":1222209,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":1222209,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2023-07-01","end":"2023-09-30","val":2810811,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":2810811,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"StockIssuedDuringPeriodSharesOther":{"label":"Stock Issued During Period, Shares, Other","description":"Number of shares of stock issued attributable to transactions classified as other.","units":{"shares":[{"start":"2011-01-01","end":"2011-12-31","val":130902,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":130902,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":63040,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":63040,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":63040,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":1125,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":1125000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-12-31","val":1125000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-12-31","val":1125,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":1125000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":1125000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":1125,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":1125,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":1125,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":0,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":29199,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":29199,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":29199,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-03-31","val":29199,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":29199,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":29199,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":29199,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":29199,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q1"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q2"},{"start":"2019-07-01","end":"2019-09-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q1"},{"start":"2020-04-01","end":"2020-06-30","val":5,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":5,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-04-01","end":"2020-06-30","val":5,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":5,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q2"},{"start":"2020-07-01","end":"2020-09-30","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":5,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":5,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":15584,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":15584,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"}]}},"StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures":{"label":"Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures","description":"Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.","units":{"shares":[{"start":"2008-01-01","end":"2008-12-31","val":275096,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":263908,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-12-31","val":263908,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-12-31","val":263908,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":263908,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":303874,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-09-30","val":305634,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":305634,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-12-31","val":312191,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":312191,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2010-01-01","end":"2010-12-31","val":312191,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":300554,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-12-31","val":348972000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-12-31","val":348972000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":348972,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":375157000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2011-01-01","end":"2011-12-31","val":348972,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":348972,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-06-30","val":349766000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":369465000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":375157,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":375157000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-12-31","val":375157000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":375157,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":375157,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":375157,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":338372000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":366905000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":384239000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":391581,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":391581000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-12-31","val":391581000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-12-31","val":391581,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":391581000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":391581000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":391581,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":391581,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":391581,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":247648000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":247648000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":291561000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":291561000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":309075,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-12-31","val":392292,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":392292,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2014-01-01","end":"2014-12-31","val":392292,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-12-31","val":392292,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":392292,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":177618,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":237484,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":242666,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":304166,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"start":"2015-01-01","end":"2015-12-31","val":304166,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":223690,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-12-31","val":141818,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2017-01-01","end":"2017-12-31","val":141818,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-12-31","val":141818,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":141818,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":63275,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":63275,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":63275,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-03-31","val":63275,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":82452,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":19177,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":19177,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":107388,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":24936,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":107388,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":107388,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":61263,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":61263,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-03-31","val":61263,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-03-31","val":61263,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2019-01-01","end":"2019-03-31","val":61263,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-03-31","val":61263,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q1"},{"start":"2019-04-01","end":"2019-06-30","val":19162,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":19162,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-04-01","end":"2019-06-30","val":19162,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":19162,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q2"},{"start":"2019-07-01","end":"2019-09-30","val":26684,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":26684,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":137060,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":137060,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":105108,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":105108,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-03-31","val":105108,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-03-31","val":105108,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2020-01-01","end":"2020-03-31","val":105108,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-03-31","val":105108,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q1"},{"start":"2020-04-01","end":"2020-06-30","val":49665,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":49665,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-04-01","end":"2020-06-30","val":49665,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":49665,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q2"},{"start":"2020-07-01","end":"2020-09-30","val":3953,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":3953,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":158726,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":158726,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":283113,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":283113,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-03-31","val":283113,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-03-31","val":283113,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2021-01-01","end":"2021-03-31","val":283113,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-03-31","val":283113,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q1"},{"start":"2021-04-01","end":"2021-06-30","val":51332,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":51332,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-04-01","end":"2021-06-30","val":51332,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":51332,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q2"},{"start":"2021-07-01","end":"2021-09-30","val":1802,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":1802,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":336247,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":336247,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":336247,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":318390,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":318390,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-03-31","val":318390,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-03-31","val":318390,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2022-01-01","end":"2022-03-31","val":318390,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-03-31","val":318390,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q1"},{"start":"2022-04-01","end":"2022-06-30","val":57355,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":57355,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-04-01","end":"2022-06-30","val":57355,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":57355,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-12-31","val":375745,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":375745,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":418518,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":418518,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-03-31","val":418518,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-03-31","val":418518,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-04-01","end":"2023-06-30","val":21134,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":21134,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q2"},{"start":"2023-07-01","end":"2023-09-30","val":1225,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":441010,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":112147,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"StockIssuedDuringPeriodSharesStockOptionsExercised":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period","description":"Number of share options (or share units) exercised during the current period.","units":{"shares":[{"start":"2008-01-01","end":"2008-12-31","val":420721,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":26056,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-12-31","val":26056,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-12-31","val":26056,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":26056,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":26056,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":58798,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-09-30","val":63298,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":63298,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-12-31","val":136432,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":136432,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2010-01-01","end":"2010-12-31","val":136432,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-12-31","val":136432,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":136432,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":163895,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":99262,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":122852,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":128502,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":130902,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":130902,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2011-01-01","end":"2011-12-31","val":226363,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":19077,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":57107,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":70297,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":83732,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":0,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":0,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":11877,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":11877,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":0,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":0,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2022-04-01","end":"2022-06-30","val":4497,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":4497,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-04-01","end":"2022-06-30","val":4497,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":4497,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q2"},{"start":"2022-07-01","end":"2022-09-30","val":11087,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":11087,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"}]}},"StockIssuedDuringPeriodValueAcquisitions":{"label":"Stock Issued During Period, Value, Acquisitions","description":"Value of stock issued pursuant to acquisitions during the period.","units":{"USD":[{"start":"2021-07-01","end":"2021-09-30","val":10023000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":10023000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":83522000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":83522000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":83522000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":12000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":12000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-03-31","val":12000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-03-31","val":12000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2022-01-01","end":"2022-03-31","val":12000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-03-31","val":12000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q1"},{"start":"2022-04-01","end":"2022-06-30","val":157393000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":157393000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-04-01","end":"2022-06-30","val":157393000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":157393000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-12-31","val":157405000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":157405000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"}]}},"StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan":{"label":"Stock Issued During Period, Value, Employee Stock Ownership Plan","description":"Aggregate value of stock issued during the period as a result of employee stock ownership plan (ESOP).","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":1689000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":1378000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-12-31","val":1378000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-12-31","val":1378000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":1378000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":1378000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":1513000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-09-30","val":1513000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":1513000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-12-31","val":1513000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":1513000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2010-01-01","end":"2010-12-31","val":1513000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-12-31","val":1513000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":1513000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":1513000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":1612000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":1612000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":1612000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":1612000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":1612000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2011-01-01","end":"2011-12-31","val":1612000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-12-31","val":1612000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":1612000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":1654000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2011-01-01","end":"2011-12-31","val":1612000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":1612000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":1654000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":1654000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":1654000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":1654000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":1654000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-12-31","val":1654000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":1654000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":1654000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":1654000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":1622000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":1622000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":1622000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":1622000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":1622000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-12-31","val":1622000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-12-31","val":1622000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":1622000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":1622000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":1622000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":1622000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":1622000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":1909000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":1909000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":1909000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":1909000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":1909000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-12-31","val":1909000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":1909000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2014-01-01","end":"2014-12-31","val":1909000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-12-31","val":1909000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":1909000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":919000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":919000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":919000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":919000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"start":"2015-01-01","end":"2015-12-31","val":919000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015"}]}},"StockIssuedDuringPeriodValueEmployeeStockPurchasePlan":{"label":"Stock Issued During Period, Value, Employee Stock Purchase Plan","description":"Aggregate change in value for stock issued during the period as a result of employee stock purchase plan.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":944000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":725000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-12-31","val":725000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-12-31","val":725000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":725000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":725000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":951000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-09-30","val":951000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":951000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-12-31","val":951000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":951000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2010-01-01","end":"2010-12-31","val":951000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-12-31","val":951000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":951000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":951000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":1000000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":1000000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":1000000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":1000000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":1000000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2011-01-01","end":"2011-12-31","val":1000000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-12-31","val":1000000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":1000000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":1076000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2011-01-01","end":"2011-12-31","val":1000000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":1000000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":1076000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":1076000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":1076000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":1076000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":1076000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-12-31","val":1076000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":1076000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":1076000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":1076000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":946000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":946000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":946000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":946000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":946000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-12-31","val":946000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-12-31","val":946000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":946000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":946000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":946000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":946000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":946000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":824000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":824000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":824000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":824000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":824000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-12-31","val":824000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":824000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2014-01-01","end":"2014-12-31","val":824000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-12-31","val":824000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":824000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":302000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":302000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":302000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":302000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"start":"2015-01-01","end":"2015-12-31","val":302000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015"}]}},"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":"2009-01-01","end":"2009-12-31","val":108751000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-12-31","val":108751000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-12-31","val":108751000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":108751000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":108751000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":140139000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":140139000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2010-01-01","end":"2010-12-31","val":140139000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-12-31","val":140139000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":140139000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":140139000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2017-01-01","end":"2017-12-31","val":39180000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2017-01-01","end":"2017-12-31","val":39180000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-12-31","val":39180000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":39180000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2021-07-01","end":"2021-09-30","val":12756000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":12756000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":26956000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":26956000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":26956000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":27000000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-07-01","end":"2023-09-30","val":97133000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":97309000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"StockIssuedDuringPeriodValueOther":{"label":"Stock Issued During Period, Value, Other","description":"Value of shares of stock issued attributable to transactions classified as other.","units":{"USD":[{"start":"2018-01-01","end":"2018-03-31","val":708000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":708000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":708000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-03-31","val":708000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":708000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-09-30","val":709000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":709000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":709000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":426000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":426000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"}]}},"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":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":0,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":0,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"start":"2015-01-01","end":"2015-12-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":1000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-03-31","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q1"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q2"},{"start":"2019-07-01","end":"2019-09-30","val":1000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":1000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":0,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-03-31","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q1"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q2"},{"start":"2020-07-01","end":"2020-09-30","val":1000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":1000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":1000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":1000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-03-31","val":0,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q1"},{"start":"2021-04-01","end":"2021-06-30","val":0,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-04-01","end":"2021-06-30","val":0,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":0,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q2"},{"start":"2021-07-01","end":"2021-09-30","val":0,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":0,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":0,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":0,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-03-31","val":0,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-03-31","val":0,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2022-01-01","end":"2022-03-31","val":0,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-03-31","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q1"},{"start":"2022-04-01","end":"2022-06-30","val":0,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":0,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-04-01","end":"2022-06-30","val":0,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":0,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":0,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-03-31","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-03-31","val":0,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-04-01","end":"2023-06-30","val":0,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q2"},{"start":"2023-07-01","end":"2023-09-30","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":0,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"StockIssuedDuringPeriodValueStockOptionsExercised":{"label":"Stock Issued During Period, Value, Stock Options Exercised","description":"Value of stock issued as a result of the exercise of stock options.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":8299000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":326000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-12-31","val":326000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-12-31","val":326000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":326000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":326000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":824000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-09-30","val":878000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":878000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-12-31","val":2087000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":2087000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2010-01-01","end":"2010-12-31","val":2087000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-12-31","val":2087000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":2087000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":2087000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":742000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":990000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":1102000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":1151000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":1151000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2011-01-01","end":"2011-12-31","val":1151000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-12-31","val":1151000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":1151000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":636000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2011-01-01","end":"2011-12-31","val":1151000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":1151000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":253000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":375000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":523000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":636000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":636000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-12-31","val":636000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":636000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":636000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":636000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":4000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":4000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-12-31","val":4000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-12-31","val":4000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":4000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":4000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":4000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":4000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":4000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2022-04-01","end":"2022-06-30","val":39000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":39000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-04-01","end":"2022-06-30","val":39000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":39000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q2"},{"start":"2022-07-01","end":"2022-09-30","val":387000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":387000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"}]}},"SupplementalUnemploymentBenefitsSeveranceBenefits":{"label":"Supplemental Unemployment Benefits, Severance Benefits","description":"Liability for amount due employees, in addition to wages and any other money that employers owe employees, when their employment ends through a layoff or other termination. For example, a company may provide involuntarily terminated employees with a lump sum payment equal to one week's salary for every year of employment.","units":{"USD":[{"end":"2016-09-30","val":2100000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2016-09-30","val":2100000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-09-30","val":2100000,"accn":"0000351817-18-000004","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2016Q3I"}]}},"TaxBenefitFromStockOptionsExercised":{"label":"Tax Benefit from Stock Options Exercised (Deprecated 2012-01-31)","description":"Reductions in the entity's income taxes that arise when compensation cost (from non-qualified stock options) recognized on the entity's tax return exceeds compensation cost from non-qualified stock options recognized on the income statement. This element increases net cash provided by operating activities.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":100000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":200000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-09-30","val":200000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":800000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":900000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":1100000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":1100000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":1100000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":100000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"}]}},"TaxBenefitFromStockOptionsExercised1":{"label":"Tax Benefit from Stock Options Exercised (Deprecated 2013-01-31)","description":"Tax benefits realized from the exercise of stock options resulting in reductions in the entity's income taxes, which increases net cash provided by operating activities.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":800000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":1100000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":1100000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":1100000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":100000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":200000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-06-30","val":200000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":300000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-09-30","val":300000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":300000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"}]}},"TaxesOther":{"label":"Taxes, Other","description":"Amount of tax expense classified as other.","units":{"USD":[{"start":"2012-01-01","end":"2012-12-31","val":47546000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-09-30","val":32221000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":11695000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":42725000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":42725000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":9202000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":18638000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":9436000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":28829000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":28829000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":10191000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":10191000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":37038000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":37038000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":5132000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":5132000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":9556000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":4424000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":14169000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":4613000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":17090000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":2332000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":1618000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":3898000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":2280000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":6377000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":2479000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":8205000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":3031000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":3031000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":5692000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":5692000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":2662000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":2662000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":8156000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":8156000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":2464000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":2464000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":11394000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":11394000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":3316000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":3316000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":7266000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":7266000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":3950000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":3950000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":11044000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":11044000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":3778000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":3778000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":13874000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":13874000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":2964000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":2964000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":5001000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":5001000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":2037000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":2037000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":7513000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":7513000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":2512000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":2512000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":10514000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":10514000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":3489000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":3489000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":7066000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":7066000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":3577000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":3577000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":11974000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":11974000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":4908000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":4908000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":19307000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":19307000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":19307000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":7764000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":7764000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":17602000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":17602000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":9838000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":9838000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":30183000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":30183000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":12581000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":12581000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":41761000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":41761000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":9385000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":9385000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":18156000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":8771000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":28563000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":10407000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":38701000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":16212000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"TaxesPayableCurrent":{"label":"Taxes Payable, Current","description":"Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).","units":{"USD":[{"end":"2011-12-31","val":7604000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":7604000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":7604000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-06-30","val":8610000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":8618000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":5373000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":5373000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":5373000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":5373000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":5373000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":5473000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":7285000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":8652000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":12292000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":5845000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":5845000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":5845000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":5845000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":5845000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":5845000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":5845000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":5845000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":6874000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":6874000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":7533000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":7533000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":9626000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":2957000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":2957000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":2957000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":2957000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":2957000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":3897000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":5385000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":5652000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":0,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":3022000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":3898000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":3898000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":3898000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":3898000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":4058000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":5137000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":8237000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":3583000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":3583000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":3583000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":3583000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":3583000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":2533000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":4279000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":4502000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":1413000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":1413000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":1413000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":1413000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":1413000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":2042000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":3102000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":4133000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":1819000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":1819000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":1819000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":1819000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":1819000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":2931000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":2517000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":6141000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":3314000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":3314000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":3314000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":3314000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":3314000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":6003000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":12687000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":16352000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":4849000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":4849000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":4849000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":4849000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":4849000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":5836000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":8957000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":13303000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":3870000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":3870000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":10447000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"TreasuryStockAcquiredAverageCostPerShare":{"label":"Treasury Stock Acquired, Average Cost Per Share","description":"Total cost of shares repurchased divided by the total number of shares repurchased.","units":{"USD/shares":[{"start":"1999-06-01","end":"1999-06-30","val":14.34,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"}]}},"TreasuryStockCarryingBasis":{"label":"Treasury Stock, Carrying Basis","description":"Cost basis for treasury stock acquired for purposes other than retirement.","units":{"USD":[{"end":"2011-12-31","val":12400000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011Q4I"}]}},"TreasuryStockNumberOfSharesHeld":{"label":"Treasury Stock, Number of Shares Held (Deprecated 2016-01-31)","description":"Number of shares held for each class of treasury stock.","units":{"shares":[{"end":"2011-12-31","val":484471,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2011Q4I"}]}},"TreasuryStockReissuedAtLowerThanRepurchasePrice":{"label":"Treasury Stock Reissued at Lower than Repurchase Price","description":"In cases when treasury stock is reissued at a price lower than the cost to repurchase, the excess difference between the selling price and cost to repurchase is charged against retained earnings (assuming that all APIC arising from treasury stock transactions has first been exhausted).","units":{"USD":[{"start":"2015-01-01","end":"2015-03-31","val":4900000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":4900000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":4900000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":4900000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"}]}},"TreasuryStockShares":{"label":"Treasury Stock, Shares","description":"Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.","units":{"shares":[{"end":"2009-12-31","val":430523,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":430523,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":430523,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":430523,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":439469,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":439936,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":439936,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":441525,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":441525,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":441525,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":441525,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":441525,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":480109,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":480843,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":481819,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":484471,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":484471,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":484471,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":484471,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":484471,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":512242,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":514136,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":518787,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":520296,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":520296,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":520296,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":520296,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":520296,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":520296,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":504972,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":506836,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":511968,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":513426,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":513426,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":513426,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":513426,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":513426,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":513426,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":513426,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":513426,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":429873,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":429873,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":433399,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":433399,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":438481,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":461434,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":461434,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":461434,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":461434,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":461434,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":158269,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":160600,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":162277,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":179395,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":179395,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":242606,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2017-12-31","val":50764,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":50764,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":50764,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":50764,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":61222,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":65871,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":65871,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":65871,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":65871,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":65871,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":65871,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":65871,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":76947,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":80824,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":81235,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":88353,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":88353,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":88353,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":88353,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":88353,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":115028,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":116126,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":117084,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":117084,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":117084,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":117084,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":117084,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":117084,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":177261,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":191230,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":191670,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":191670,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":328873,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":191670,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":191670,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":191670,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":191670,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":345358,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":353395,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":353395,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2022Q4I"}]}},"TreasuryStockSharesAcquired":{"label":"Treasury Stock, Shares, Acquired","description":"Number of shares that have been repurchased during the period and are being held in treasury.","units":{"shares":[{"start":"1999-06-01","end":"1999-06-30","val":927774,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2008-01-01","end":"2008-12-31","val":70622,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":56662,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-12-31","val":56662,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-12-31","val":56662,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":56662,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":56662,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":68281,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-09-30","val":68748,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":68748,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-12-31","val":70337,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":70337,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2010-01-01","end":"2010-12-31","val":70337,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-12-31","val":70337,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":70337,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":70337,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":75652,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":76386,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":77362,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":80014,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":80014,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2011-01-01","end":"2011-12-31","val":80014000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-12-31","val":80014000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":80014,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":86812000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2011-01-01","end":"2011-12-31","val":80014,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":80014,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":78758,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":80652000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":85302000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":86812,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":86812000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-12-31","val":86812000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":86812,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":86812,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":86812,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":89566000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":91430000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":96562000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":98020,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":98020000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-12-31","val":98020000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-12-31","val":98020,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":98020000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":98020000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":98020,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":98020,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":98020,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":71112000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":71112000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":74638000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":74638000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":79720,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-12-31","val":102673,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":102673,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2014-01-01","end":"2014-12-31","val":102673,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-12-31","val":102673,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":102673,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":49311,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":51642,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":53319,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":70437,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"start":"2015-01-01","end":"2015-12-31","val":70437,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":63211,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-12-31","val":28279,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2017-01-01","end":"2017-12-31","val":28279,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-12-31","val":28279,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":28279,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":10458,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":10458,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":10458,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-03-31","val":10458,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":15107,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":4649,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":4649,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":15107,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":0,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":15107,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":15107,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":11076,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":11076,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-03-31","val":11076,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-03-31","val":11076,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2019-01-01","end":"2019-03-31","val":11076,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-03-31","val":11076,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":14953,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":3877,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":3877,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-04-01","end":"2019-06-30","val":3877,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":3877,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":15364,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":411,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":411,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":22482,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":22482,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":26675,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":26675,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-03-31","val":26675,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-03-31","val":26675,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2020-01-01","end":"2020-03-31","val":26675,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-03-31","val":26675,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":27773,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":27773,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":1098,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":1098,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-04-01","end":"2020-06-30","val":1098,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":1098,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":28731,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":28731,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":958,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":958,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":28731,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":28731,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":60177,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":60177,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-03-31","val":60177,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-03-31","val":60177,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2021-01-01","end":"2021-03-31","val":60177,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-03-31","val":60177,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":74146,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":74146,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":13969,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":13969,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-04-01","end":"2021-06-30","val":13969,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":13969,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":74586,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":74586,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":440,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":440,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":74586,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":74586,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":74586,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":96012,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":96012,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-03-31","val":96012,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-03-31","val":96012,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2022-01-01","end":"2022-03-31","val":96012,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-03-31","val":96012,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":112497,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":112497,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":16485,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":16485,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-04-01","end":"2022-06-30","val":16485,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":16485,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":120350,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":120350,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":7853,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":7853,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":120350,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":120350,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":126240,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":126240,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-03-31","val":126240,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-03-31","val":126240,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":131550,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":5310,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":5310,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":131911,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":361,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":131951,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":17949,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"TreasuryStockValue":{"label":"Treasury Stock, Value","description":"The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.","units":{"USD":[{"end":"2009-12-31","val":9221000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"end":"2009-12-31","val":9221000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2009-12-31","val":9221000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"end":"2009-12-31","val":9221000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2009Q4I"},{"end":"2010-06-30","val":9713000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"},{"end":"2010-09-30","val":9725000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"end":"2010-09-30","val":9725000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":9778000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"end":"2010-12-31","val":9778000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":9778000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":9778000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":9778000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-03-31","val":12219000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":12246000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":12276000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":12350000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":12350000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":12350000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":12350000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":12350000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":13686000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":13736000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":13831000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":13855000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":13855000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":13855000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":13855000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":13855000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":13855000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":12471000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":12495000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":12556000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":12575000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":12575000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":12575000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":12575000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":12575000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":12575000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":12575000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":12575000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":9645000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":9645000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":9686000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":9686000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":9744000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":9855000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":9855000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":9855000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":9855000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":9855000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":2491000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":2487000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":2487000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":2491000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":2491000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":2495000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2016-06-30","val":0,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09","frame":"CY2016Q2I"},{"end":"2016-09-30","val":0,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03","frame":"CY2016Q3I"},{"end":"2017-12-31","val":1452000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"end":"2017-12-31","val":1452000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"end":"2017-12-31","val":1452000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"end":"2017-12-31","val":1452000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017Q4I"},{"end":"2018-03-31","val":1742000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":1870000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":1870000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2018Q3I"},{"end":"2018-12-31","val":1870000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"end":"2018-12-31","val":1870000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":1870000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"end":"2018-12-31","val":1870000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":1870000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018Q4I"},{"end":"2019-03-31","val":2130000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2019Q1I"},{"end":"2019-06-30","val":2188000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2019Q2I"},{"end":"2019-09-30","val":2193000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":2282000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"end":"2019-12-31","val":2282000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":2282000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"end":"2019-12-31","val":2282000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":2282000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":2365000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":2368000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2020Q2I"},{"end":"2020-09-30","val":2372000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":2372000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"end":"2020-12-31","val":2372000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"end":"2020-12-31","val":2372000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"end":"2020-12-31","val":2372000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"end":"2020-12-31","val":2372000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-03-31","val":2860000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2021Q1I"},{"end":"2021-06-30","val":2975000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":2984000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2021Q3I"},{"end":"2021-12-31","val":2984000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":2984000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"end":"2021-12-31","val":2984000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"end":"2021-12-31","val":2984000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"end":"2021-12-31","val":2984000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":6592000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2022Q1I"},{"end":"2022-06-30","val":7095000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2022Q2I"},{"end":"2022-09-30","val":7534000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2022Q3I"},{"end":"2022-12-31","val":7534000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":7534000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":7534000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":7534000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":7534000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":10479000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":10600000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":10616000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":10617000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":10617000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":11151000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"TreasuryStockValueAcquiredCostMethod":{"label":"Treasury Stock, Value, Acquired, Cost Method","description":"Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.","units":{"USD":[{"start":"1999-06-01","end":"1999-06-30","val":13300000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2012-01-01","end":"2012-12-31","val":2805000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":-1513000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":1513000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":1513000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-09-30","val":-954000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-12-31","val":1065000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":-1065000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2014-01-01","end":"2014-12-31","val":-1065000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-01-01","end":"2014-12-31","val":-1065000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-01-01","end":"2014-12-31","val":1065000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":-154000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-150000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":-150000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-12-31","val":154000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"start":"2015-01-01","end":"2015-12-31","val":-154000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-4000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-12-31","val":777000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2017-01-01","end":"2017-12-31","val":777000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-12-31","val":777000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":777000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":290000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":290000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":-290000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-03-31","val":290000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":418000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":-128000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":128000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":418000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":418000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":418000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":260000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":-260000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-03-31","val":260000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-03-31","val":260000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2019-01-01","end":"2019-03-31","val":260000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-03-31","val":260000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q1"},{"start":"2019-04-01","end":"2019-06-30","val":-58000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":58000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-04-01","end":"2019-06-30","val":58000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":58000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q2"},{"start":"2019-07-01","end":"2019-09-30","val":5000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":5000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":412000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":412000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":83000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":83000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-03-31","val":83000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-03-31","val":83000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2020-01-01","end":"2020-03-31","val":83000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-03-31","val":83000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q1"},{"start":"2020-04-01","end":"2020-06-30","val":3000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":3000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-04-01","end":"2020-06-30","val":3000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":3000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q2"},{"start":"2020-07-01","end":"2020-09-30","val":4000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":4000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":90000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":90000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":488000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":488000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-03-31","val":488000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-03-31","val":488000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2021-01-01","end":"2021-03-31","val":488000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-03-31","val":488000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q1"},{"start":"2021-04-01","end":"2021-06-30","val":115000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":115000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-04-01","end":"2021-06-30","val":115000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":115000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q2"},{"start":"2021-07-01","end":"2021-09-30","val":9000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":9000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":612000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":612000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":612000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":2462000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":2462000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-03-31","val":2462000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-03-31","val":2462000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2022-01-01","end":"2022-03-31","val":2462000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-03-31","val":2462000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q1"},{"start":"2022-04-01","end":"2022-06-30","val":503000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":503000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-04-01","end":"2022-06-30","val":503000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":503000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q2"},{"start":"2022-07-01","end":"2022-09-30","val":432000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":432000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":3397000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":3397000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":2945000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":2945000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-03-31","val":2945000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-03-31","val":2945000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-04-01","end":"2023-06-30","val":121000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":121000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q2"},{"start":"2023-07-01","end":"2023-09-30","val":16000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":3083000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":534000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"TreasuryStockValueAcquiredParValueMethod":{"label":"Treasury Stock, Value, Acquired, Par Value Method","description":"Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the par value method.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":-3622000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":-884000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-01-01","end":"2009-12-31","val":-884000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-12-31","val":-884000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":-884000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":884000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":-1763000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-09-30","val":-1775000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":-1775000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-12-31","val":-1828000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":-1828000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2010-01-01","end":"2010-12-31","val":-1828000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-01-01","end":"2010-12-31","val":1828000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":1828000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":1828000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":-3262000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-3289000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":3319000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":3393000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":3393000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2011-01-01","end":"2011-12-31","val":3393000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-12-31","val":3393000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":3393000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":2805000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2011-01-01","end":"2011-12-31","val":3393000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":3393000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":2636000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":2686000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-09-30","val":2781000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-12-31","val":2805000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":2805000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-01-01","end":"2012-12-31","val":2805000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-01-01","end":"2012-12-31","val":2805000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":2805000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":1409000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":1433000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-09-30","val":1494000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-12-31","val":1513000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":1513000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-12-31","val":1513000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-12-31","val":1513000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":1513000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":1513000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":855000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":855000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":896000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":896000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"}]}},"UnamortizedDebtIssuanceExpense":{"label":"Unamortized Debt Issuance Expense","description":"The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.","units":{"USD":[{"end":"2010-12-31","val":3600000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q4I"},{"end":"2011-06-30","val":700000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":700000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"}]}},"UndistributedEarningsAllocatedToParticipatingSecurities":{"label":"Undistributed Earnings Allocated to Participating Securities (Deprecated 2014-01-31)","description":"Earnings allocated (not distributed) to participating securities under the two-class method to the extent that participating securities may share in earnings as if all of the earnings for the period had been distributed.","units":{"USD":[{"start":"2010-01-01","end":"2010-06-30","val":512000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":242000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":693000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":179000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":879000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2010-01-01","end":"2010-12-31","val":879000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-03-31","val":370000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":807000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-06-30","val":807000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":456000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-04-01","end":"2011-06-30","val":456000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-09-30","val":1195000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-09-30","val":1195000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":326000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-07-01","end":"2011-09-30","val":326000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":1598000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2011-01-01","end":"2011-12-31","val":1598000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2012-01-01","end":"2012-03-31","val":74000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-03-31","val":74000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-06-30","val":142000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":68000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":210000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":68000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":448000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":165000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1"}]}},"UnrealizedGainLossOnDerivatives":{"label":"Unrealized Gain (Loss) on Derivatives","description":"The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.","units":{"USD":[{"start":"2013-01-01","end":"2013-06-30","val":1800000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":1800000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":100000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":-700000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":-100000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":-100000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-3400000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":-3400000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1"},{"start":"2014-04-01","end":"2014-06-30","val":-1200000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":-1200000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2"},{"start":"2014-07-01","end":"2014-09-30","val":1200000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3"}]}},"UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations":{"label":"Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations","description":"Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":-977000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"}]}},"UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate":{"label":"Unrecognized Tax Benefits that Would Impact Effective Tax Rate","description":"The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.","units":{"USD":[{"end":"2011-06-30","val":1000000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":1000000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"}]}},"ValuationAllowanceAmount":{"label":"Valuation Allowance, Amount (Deprecated 2013-01-31)","description":"The amount of the valuation allowance recorded as of the balance sheet date pertaining to the specified deferred tax asset for which an assessment was made that it is more likely than not that all or a portion of such deferred tax asset will not be realized through related deductions on future tax returns.","units":{"USD":[{"end":"2011-12-31","val":3901000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-12-31","val":6318000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012Q4I"}]}},"ValuationAllowanceDeferredTaxAssetChangeInAmount":{"label":"Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount","description":"Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.","units":{"USD":[{"start":"2012-01-01","end":"2012-12-31","val":2400000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"}]}},"WeightedAverageCostInventoryAmount":{"label":"Weighted Average Cost Inventory Amount","description":"The amount of weighted average cost inventory present at the reporting date when inventory is valued using different valuation methods.","units":{"USD":[{"end":"2010-12-31","val":12800000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"end":"2010-12-31","val":12800000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":12800000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4I"},{"end":"2011-06-30","val":8700000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2011Q2I"},{"end":"2011-09-30","val":6300000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":3600000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"end":"2011-12-31","val":3600000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":3600000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":3600000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":3600000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2011Q4I"},{"end":"2012-03-31","val":3200000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":5000000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":2700000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":5600000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"end":"2012-12-31","val":5600000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":5600000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":5600000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"end":"2012-12-31","val":5600000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":5600000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":2500000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":2800000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":2900000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2013Q3I"},{"end":"2013-12-31","val":3500000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":3500000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":3500000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":3500000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"end":"2013-12-31","val":3500000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":3500000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"end":"2013-12-31","val":3500000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"end":"2013-12-31","val":3500000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":3300000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2014-03-31","val":3300000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q1I"},{"end":"2014-06-30","val":3000000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2014-06-30","val":3000000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2014Q2I"},{"end":"2014-09-30","val":3100000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2014Q3I"},{"end":"2014-12-31","val":3100000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":3100000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":3100000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"end":"2014-12-31","val":3100000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"end":"2014-12-31","val":3100000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014Q4I"},{"end":"2015-03-31","val":3100000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":800000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":900000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3I"},{"end":"2015-12-31","val":600000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04"},{"end":"2015-12-31","val":600000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10"},{"end":"2015-12-31","val":600000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2015-12-31","val":600000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"},{"end":"2015-12-31","val":600000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28","frame":"CY2015Q4I"},{"end":"2016-03-31","val":400000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2016-06-30","val":400000,"accn":"0000351817-16-000077","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09","frame":"CY2016Q2I"},{"end":"2016-09-30","val":400000,"accn":"0000351817-16-000089","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03","frame":"CY2016Q3I"},{"end":"2016-12-31","val":400000,"accn":"0000351817-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-12-31","val":400000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08"},{"end":"2016-12-31","val":400000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-12-31","val":400000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07","frame":"CY2016Q4I"},{"end":"2017-03-31","val":400000,"accn":"0000351817-17-000039","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-08","frame":"CY2017Q1I"},{"end":"2017-06-30","val":700000,"accn":"0000351817-17-000048","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09","frame":"CY2017Q2I"},{"end":"2017-09-30","val":600000,"accn":"0000351817-17-000058","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07","frame":"CY2017Q3I"}]}},"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":33594000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":37979000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":38103000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":37995000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":38058000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":38524000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":38524000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":42509000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":42532000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":42532000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":42665000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":42665000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":42619000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":42619000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":42678000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":42678000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":42629000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":42629000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":42896000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":42896000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":42874000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":42874000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":42926000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":43133000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":42954000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":43111000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":42945000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":43158000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":42971000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":43239000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":42930000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":43174000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":43174000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":43174000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":43323000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":43603000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":43603000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":43599000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":43599000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":43599000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":43612000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":43612000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":43612000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":43624000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":43624000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":43704000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":43704000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":43331000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":43331000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":43331000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":43331000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":44118000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":44118000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":44118000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":44215000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":44215000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":44215000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":44312000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":44312000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":44312000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":44299000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":44299000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":44473000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":44473000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":43795000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":43795000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":44232000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":44232000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":44374000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":44516000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":44431000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":44546000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":44463000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":44672000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":11323000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":11445000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":11554000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":11479000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":11545000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":11514000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":11727000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":11727000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":11742000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":11742000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":11757000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":11757000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":11759000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":11759000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":11792000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":11792000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":11764000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":11764000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":11788000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":11788000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":11786000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":11786000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":11780000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":11780000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":11776000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":11776000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":11780000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":11780000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":11778000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":11778000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":11825000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":11825000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":11868000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":11868000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":11910000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":11910000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":11890000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":11890000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":11935000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":11935000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":11902000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":11902000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":12294000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":12294000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":12379000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":12379000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":12190000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":12190000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":12283000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":12283000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":12629000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":12629000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":13520000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":13520000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":13520000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":16719000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":16719000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":17506000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":17506000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":17938000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":17938000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":19237000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":19237000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":22669000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":22669000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":20097000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":20097000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":22634000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":22634000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":22654000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":22674000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":22852000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":22985000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":23571000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":25445000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"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":"2008-01-01","end":"2008-12-31","val":30661000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":31103000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2009-04-01","end":"2009-06-30","val":31175000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q2"},{"start":"2009-01-01","end":"2009-09-30","val":32310000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-01-01","end":"2009-09-30","val":32310000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2009-07-01","end":"2009-09-30","val":34723000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2009-07-01","end":"2009-09-30","val":34723000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05","frame":"CY2009Q3"},{"start":"2009-01-01","end":"2009-12-31","val":33594000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":33594000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":37652000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":37749000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-01-01","end":"2010-06-30","val":37749000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2010-04-01","end":"2010-06-30","val":37845000,"accn":"0000351817-10-000031","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05"},{"start":"2010-04-01","end":"2010-06-30","val":37845000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":37792000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":37792000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-09-30","val":37792000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-07-01","end":"2010-09-30","val":37880000,"accn":"0000351817-10-000044","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":37880000,"accn":"0000351817-10-000048","fy":2010,"fp":"Q3","form":"10-Q/A","filed":"2010-11-05"},{"start":"2010-07-01","end":"2010-09-30","val":37880000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":38300000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":38300000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":38300000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":42190000,"accn":"0000351817-11-000021","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"start":"2011-01-01","end":"2011-03-31","val":42190000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":42313000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-01-01","end":"2011-06-30","val":42313000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-04-01","end":"2011-06-30","val":42436000,"accn":"0000351817-11-000030","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-04"},{"start":"2011-04-01","end":"2011-06-30","val":42436000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":42365000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":42365000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":42470000,"accn":"0000351817-11-000042","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-07-01","end":"2011-09-30","val":42470000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":42394000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":42394000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2011-01-01","end":"2011-12-31","val":42394000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2011-01-01","end":"2011-12-31","val":42394000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":42674000,"accn":"0000351817-12-000017","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"start":"2012-01-01","end":"2012-03-31","val":42674000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":42768000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":42768000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2012-04-01","end":"2012-06-30","val":42862000,"accn":"0000351817-12-000028","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-04-01","end":"2012-06-30","val":42862000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":42812000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":42812000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2012-07-01","end":"2012-09-30","val":42901000,"accn":"0000351817-12-000042","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":42901000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":42840000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22"},{"start":"2012-01-01","end":"2012-12-31","val":42840000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":42840000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2012-01-01","end":"2012-12-31","val":42840000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":43167000,"accn":"0000351817-13-000016","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":43167000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2013-01-01","end":"2013-03-31","val":43167000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":43268000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":43268000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-01-01","end":"2013-06-30","val":43268000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2013-04-01","end":"2013-06-30","val":43369000,"accn":"0000351817-13-000023","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":43369000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":43369000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":43308000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-01-01","end":"2013-09-30","val":43308000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2013-07-01","end":"2013-09-30","val":43389000,"accn":"0000351817-13-000037","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-31"},{"start":"2013-07-01","end":"2013-09-30","val":43389000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":43331000,"accn":"0000351817-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":43331000,"accn":"0000351817-14-000052","fy":2013,"fp":"FY","form":"10-K/A","filed":"2014-11-17"},{"start":"2013-01-01","end":"2013-12-31","val":43331000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-01-01","end":"2013-12-31","val":43331000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":43628000,"accn":"0000351817-14-000016","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"start":"2014-01-01","end":"2014-03-31","val":43628000,"accn":"0000351817-14-000053","fy":2014,"fp":"Q1","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-03-31","val":43628000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":43727000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-06-30","val":43727000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-06-30","val":43727000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2014-04-01","end":"2014-06-30","val":43826000,"accn":"0000351817-14-000033","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":43826000,"accn":"0000351817-14-000054","fy":2014,"fp":"Q2","form":"10-Q/A","filed":"2014-11-17"},{"start":"2014-04-01","end":"2014-06-30","val":43826000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":43768000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-01-01","end":"2014-09-30","val":43768000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2014-07-01","end":"2014-09-30","val":43850000,"accn":"0000351817-14-000055","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-17"},{"start":"2014-07-01","end":"2014-09-30","val":43850000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":43795000,"accn":"0000351817-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2014-01-01","end":"2014-12-31","val":43795000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":44232000,"accn":"0000351817-15-000010","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":44232000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":44374000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-04-01","end":"2015-06-30","val":44516000,"accn":"0000351817-15-000017","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2"},{"start":"2015-01-01","end":"2015-09-30","val":44431000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-07-01","end":"2015-09-30","val":44546000,"accn":"0000351817-15-000023","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05","frame":"CY2015Q3"},{"start":"2015-01-01","end":"2015-12-31","val":44463000,"accn":"0000351817-16-000042","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-04","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":44672000,"accn":"0000351817-16-000064","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1"},{"start":"2017-01-01","end":"2017-03-31","val":11232000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":11360000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-01","end":"2017-06-30","val":11487000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":11417000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-07-01","end":"2017-09-30","val":11531000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":11453000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":11602000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09"},{"start":"2018-01-01","end":"2018-03-31","val":11602000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":11629000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-06-30","val":11629000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-04-01","end":"2018-06-30","val":11655000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":11655000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":11643000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-09-30","val":11643000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":11671000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-07-01","end":"2018-09-30","val":11671000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":11655000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":11655000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":11708000,"accn":"0000351817-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":11708000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":11727000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":11727000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-04-01","end":"2019-06-30","val":11746000,"accn":"0000351817-19-000016","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-04-01","end":"2019-06-30","val":11746000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":11739000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-09-30","val":11739000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":11762000,"accn":"0000351817-19-000024","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-07-01","end":"2019-09-30","val":11762000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":11753000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":11753000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":11825000,"accn":"0000351817-20-000014","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"start":"2020-01-01","end":"2020-03-31","val":11825000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":11868000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":11868000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":11910000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-04-01","end":"2020-06-30","val":11910000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":11890000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":11890000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-07-01","end":"2020-09-30","val":11935000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-07-01","end":"2020-09-30","val":11935000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":11902000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":11902000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":12029000,"accn":"0000351817-21-000014","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-06"},{"start":"2021-01-01","end":"2021-03-31","val":12029000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":12110000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":12110000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-04-01","end":"2021-06-30","val":12190000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-04-01","end":"2021-06-30","val":12190000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":12283000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":12283000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-07-01","end":"2021-09-30","val":12629000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-07-01","end":"2021-09-30","val":12629000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":13118000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":13118000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":13118000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":16719000,"accn":"0000351817-22-000025","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":16719000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":17146000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":17146000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-04-01","end":"2022-06-30","val":17581000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-04-01","end":"2022-06-30","val":17581000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":18885000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":18885000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-07-01","end":"2022-09-30","val":22308000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-07-01","end":"2022-09-30","val":22308000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":19748000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":19748000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":22440000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":22440000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":22527000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":22615000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":22677000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-07-01","end":"2023-09-30","val":22985000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3"},{"start":"2023-01-01","end":"2023-12-31","val":23371000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":25445000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"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":"2008-01-01","end":"2008-12-31","val":0,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":3961000,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24"},{"start":"2009-01-01","end":"2009-12-31","val":3961000,"accn":"0000351817-12-000006","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000351817-11-000012","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-24","frame":"CY2010"},{"start":"2012-01-01","end":"2012-12-31","val":700000,"accn":"0000351817-13-000007","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-22","frame":"CY2012"},{"start":"2017-01-01","end":"2017-03-31","val":450000,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":2401000,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":2401000,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":2676000,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0000351817-18-000012","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":0,"accn":"0000351817-18-000018","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08"},{"start":"2018-01-01","end":"2018-09-30","val":0,"accn":"0000351817-18-000023","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0000351817-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-28"},{"start":"2018-01-01","end":"2018-12-31","val":0,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05","frame":"CY2018"},{"start":"2019-01-01","end":"2019-06-30","val":0,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2019-01-01","end":"2019-09-30","val":0,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2019-01-01","end":"2019-12-31","val":82000,"accn":"0000351817-20-000004","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-05"},{"start":"2019-01-01","end":"2019-12-31","val":82000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019"},{"start":"2020-01-01","end":"2020-06-30","val":459000,"accn":"0000351817-20-000039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-05"},{"start":"2020-01-01","end":"2020-06-30","val":459000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2020-01-01","end":"2020-09-30","val":459000,"accn":"0000351817-20-000044","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"start":"2020-01-01","end":"2020-09-30","val":459000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2020-01-01","end":"2020-12-31","val":557000,"accn":"0000351817-21-000005","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04"},{"start":"2020-01-01","end":"2020-12-31","val":557000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-06-30","val":229000,"accn":"0000351817-21-000019","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-05"},{"start":"2021-01-01","end":"2021-06-30","val":229000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2021-01-01","end":"2021-09-30","val":229000,"accn":"0000351817-21-000027","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-04"},{"start":"2021-01-01","end":"2021-09-30","val":229000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":229000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":229000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":229000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-06-30","val":350000,"accn":"0000351817-22-000052","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-04"},{"start":"2022-01-01","end":"2022-06-30","val":350000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":350000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":350000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":350000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":350000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-06-30","val":0,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":1239000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"DeferredTaxAssetsDerivativeInstruments":{"label":"Deferred Tax Assets, Derivative Instruments","description":"Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from derivative instruments.","units":{"USD":[{"end":"2020-12-31","val":0,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020Q4I"},{"end":"2021-12-31","val":11451000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-12-31","val":11451000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-12-31","val":0,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2022Q4I"}]}},"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":-288471000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":93157000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":93157000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":93157000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":350037000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":350037000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":381329000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths":{"label":"Lessee, Operating Lease, Liability, to be Paid, Year One","description":"Amount of lessee's undiscounted obligation for lease payment for operating 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":"2021-12-31","val":7757000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2021Q4I"},{"end":"2022-12-31","val":8939000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2022Q4I"},{"end":"2023-12-31","val":4860000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"}]}},"ProfessionalFees":{"label":"Professional Fees","description":"A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer.","units":{"USD":[{"end":"2021-11-12","val":100000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-11-12","val":100000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q3I"}]}},"RepaymentsOfLongTermDebt":{"label":"Repayments of Long-term Debt","description":"The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.","units":{"USD":[{"start":"2020-01-01","end":"2020-12-31","val":0,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03","frame":"CY2020"},{"end":"2021-11-29","val":50000000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"end":"2021-11-29","val":50000000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"start":"2021-01-01","end":"2021-12-31","val":50000000,"accn":"0000351817-22-000009","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-03"},{"start":"2021-01-01","end":"2021-12-31","val":50000000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":50000000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":14250000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"IncreaseDecreaseInCommodityContractAssetsAndLiabilities":{"label":"Increase (Decrease) in Commodity Contract Assets and Liabilities","description":"The increase (decrease) during the reporting period in the assets (liabilities) created through trading commodity-based derivative instruments.","units":{"USD":[{"start":"2021-01-01","end":"2021-09-30","val":-28976000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":-182058000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"}]}},"PaymentsToAcquireProductiveAssets":{"label":"Payments to Acquire Productive Assets","description":"The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.","units":{"USD":[{"start":"2021-01-01","end":"2021-09-30","val":98219000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2021-01-01","end":"2021-12-31","val":133638000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":133638000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":35228000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":93746000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":163567000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-09-30","val":163567000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":272443000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":272443000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":111285000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":111285000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":221464000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":316003000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":421273000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":80225000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"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":"2021-01-01","end":"2021-09-30","val":-152879000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2022-01-01","end":"2022-03-31","val":-140242000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":-162648000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":-157816000,"accn":"0000351817-22-000062","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-03"},{"start":"2023-01-01","end":"2023-03-31","val":92249000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":112243000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"}]}},"CurrentFederalTaxExpenseBenefit":{"label":"Current Federal Tax Expense (Benefit)","description":"Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.","units":{"USD":[{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":0,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"DeferredFederalIncomeTaxExpenseBenefit":{"label":"Deferred Federal Income Tax Expense (Benefit)","description":"Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.","units":{"USD":[{"start":"2021-01-01","end":"2021-12-31","val":5500000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":5500000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":7188000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":7188000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":80634000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"DeferredFederalStateAndLocalTaxExpenseBenefit":{"label":"Deferred Federal, State and Local, Tax Expense (Benefit)","description":"Amount of deferred state, local, and federal tax expense (benefit) pertaining to income (loss) from continuing operations.","units":{"USD":[{"start":"2022-01-01","end":"2022-12-31","val":75800000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":82900000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"DeferredStateAndLocalIncomeTaxExpenseBenefit":{"label":"Deferred State and Local Income Tax Expense (Benefit)","description":"Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.","units":{"USD":[{"start":"2021-01-01","end":"2021-12-31","val":712000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":712000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":2437000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":2437000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":2452000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"}]}},"DeferredTaxAssetInterestCarryforward":{"label":"Deferred Tax Asset, Interest Carryforward","description":"Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible interest carryforward.","units":{"USD":[{"end":"2021-12-31","val":0,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02","frame":"CY2021Q4I"},{"end":"2022-12-31","val":8798000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"end":"2022-12-31","val":8798000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-12-31","val":21528000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023Q4I"}]}},"PaymentsToAcquireBusinessesGross":{"label":"Payments to Acquire Businesses, Gross","description":"The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.","units":{"USD":[{"start":"2021-01-01","end":"2021-12-31","val":51734000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2021-01-01","end":"2021-12-31","val":51734000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":-436000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":272225000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":293880000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":367024000,"accn":"0000351817-23-000032","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-02"},{"start":"2022-01-01","end":"2022-12-31","val":367024000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":1090000,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"start":"2023-01-01","end":"2023-03-31","val":1090000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":248000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":382000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":604955000,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-11821000,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}},"TreasuryStockCommonShares":{"label":"Treasury Stock, Common, Shares","description":"Number of previously issued common shares repurchased by the issuing entity and held in treasury.","units":{"shares":[{"end":"2022-12-31","val":353395,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-12-31","val":353395,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"end":"2022-12-31","val":353395,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"end":"2022-12-31","val":353395,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":479635,"accn":"0000351817-23-000056","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-04","frame":"CY2023Q1I"},{"end":"2023-06-30","val":484945,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2023Q2I"},{"end":"2023-09-30","val":485306,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"},{"end":"2023-12-31","val":485346,"accn":"0000351817-24-000016","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"end":"2023-12-31","val":485346,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q4I"},{"end":"2024-03-31","val":503295,"accn":"0000351817-24-000084","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1I"}]}},"OilAndGasDeliveryCommitmentsAndContractsDailyProduction":{"label":"Oil and Gas Delivery Commitments and Contracts, Daily Production","description":"Amount of daily production of the applicable energy source.","units":{"MMBTU":[{"start":"2023-04-01","end":"2023-06-30","val":116000,"accn":"0000351817-23-000084","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-04-01","end":"2023-06-30","val":116000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q2"}]}},"DepositAssets":{"label":"Deposit Assets","description":"The carrying amount of the asset transferred to a third party to serve as a deposit, which typically serves as security against failure by the transferor to perform under terms of an agreement.","units":{"USD":[{"end":"2022-12-31","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2022Q4I"},{"end":"2023-09-30","val":52564000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02","frame":"CY2023Q3I"}]}},"OtherPaymentsToAcquireBusinesses":{"label":"Other Payments to Acquire Businesses","description":"The cash outflow associated with other payments to acquire businesses including deposit on pending acquisitions and preacquisition costs.","units":{"USD":[{"start":"2022-01-01","end":"2022-09-30","val":0,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-09-30","val":51163000,"accn":"0000351817-23-000095","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"}]}}}}}