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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":300153000,"accn":"0001390213-18-000018","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-15"},{"end":"2016-12-31","val":300153000,"accn":"0001390213-18-000028","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2016Q4I"},{"end":"2017-03-31","val":230501000,"accn":"0001390213-18-000018","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-15","frame":"CY2017Q1I"},{"end":"2017-06-30","val":187026000,"accn":"0001390213-18-000028","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q2I"},{"end":"2017-12-31","val":145108000,"accn":"0001390213-18-000018","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-15"},{"end":"2017-12-31","val":145108000,"accn":"0001390213-18-000028","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2017Q4I"},{"end":"2018-03-31","val":129485000,"accn":"0001390213-18-000018","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-15","frame":"CY2018Q1I"},{"end":"2018-06-30","val":114962000,"accn":"0001390213-18-000028","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10","frame":"CY2018Q2I"}]}},"CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect":{"label":"Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect","description":"Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.","units":{"USD":[{"start":"2017-01-01","end":"2017-03-31","val":-69652000,"accn":"0001390213-18-000018","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-15","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":-113127000,"accn":"0001390213-18-000028","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"},{"start":"2018-01-01","end":"2018-03-31","val":-15623000,"accn":"0001390213-18-000018","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-15","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-30146000,"accn":"0001390213-18-000028","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-10"}]}},"CommitmentsAndContingencies":{"label":"Commitments and Contingencies","description":"Represents the 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to Acquire Real Estate","description":"The cash outflow from the acquisition of a piece of land, anything permanently fixed to it, including buildings, structures on it and so forth; includes real estate intended to generate income for the owner; excludes real estate acquired for use by the owner.","units":{"USD":[{"start":"2012-01-01","end":"2012-09-30","val":402594000,"accn":"0001104659-13-082339","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-07"},{"start":"2013-01-01","end":"2013-09-30","val":275156000,"accn":"0001104659-13-082339","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-07"}]}},"PaymentsToAcquireRealEstateAndRealEstateJointVentures":{"label":"Payments to Acquire Real Estate and Real Estate Joint Ventures","description":"The cash outflow associated with the purchase of real estate held-for-investment and real estate joint 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to Acquire Trading Securities Held-for-investment","description":"The cash outflow to acquire securities classified as trading securities and held for investment purposes. 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