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Schedule III - Real Estate and Accumulated Depreciation - Accumulated Depreciation Reconciliation (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Balance at January 1 $ (247,998) $ (318,724) $ (366,265)
Additions (44,270) (45,615) (48,376)
Other 0 44,200 0
Dispositions 9,427 72,141 95,917
Balance at December 31 $ (282,841) $ (247,998) $ (318,724)