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Schedule III - Real Estate and Accumulated Depreciation - Reconciliation of Carrying Amount of Real Estate and Accumulated Depreciation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Beginning balance $ 7,059,537 $ 6,644,249 $ 6,507,484
Acquisitions 0 505,257 255,848
Improvements, capitalized costs 395,390 364,721 330,809
Total additions during period 395,390 869,978 586,657
Disposal (fully depreciated assets and early terminations) (27,957) (27,821) (41,337)
Impairment loss (52,201) 0 0
Cost of property sold (105,641) (426,869) (408,555)
Total deductions during period (185,799) (454,690) (449,892)
Ending balance 7,269,128 7,059,537 6,644,249
Reclassification to assets associated with real estate held for sale 0 0 (424,888)
Total investment in real estate, end of year 7,269,128 7,059,537 6,219,361
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Total accumulated depreciation, beginning of year (695,631) (549,411) (423,950)
Depreciation of real estate (235,097) (203,347) (206,838)
Total additions during period (235,097) (203,347) (206,838)
Deletions 26,533 27,410 37,925
Write-offs due to sale 5,916 29,717 43,452
Total deductions during period 32,449 57,127 81,377
Ending balance, before reclassification to assets associated with real estate held for sale (898,279) (695,631) (549,411)
Reclassification to assets associated with real estate held for sale 0 0 28,041
Total accumulated depreciation, end of year $ (898,279) $ (695,631) $ (521,370)