SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION - Schedule of Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Real Estate and Equipment
Balance at the end of the period	$ 7,523,787
Accumulated Depreciation
Balance at the end of the period	1,703,187
Continuing Operations
Real Estate and Equipment
Balance at the beginning of the period	7,461,586	$ 7,876,300	$ 7,824,763
Additions	192,124	277,350	242,270
Disposals	(145,430)	(250,996)	(17,923)
Impairment	(106,972)	(114,786)	(46,797)
Cost basis adjustment	(126,127)	(77,642)	(122,711)
Reclassification of assets held for sale, net	135,549	(248,640)	(3,302)
Balance at the end of the period	7,410,730	7,461,586	7,876,300
Accumulated Depreciation
Balance at the beginning of the period	1,570,801	1,534,392	1,454,477
Additions	216,418	221,165	205,117
Disposals	(10,228)	(54,816)	(1,101)
Impairment	0	0	0
Cost basis adjustment	(126,127)	(77,642)	(122,711)
Reclassification of assets held for sale, net	44,037	(52,298)	(1,390)
Balance at the end of the period	$ 1,694,901	$ 1,570,801	$ 1,534,392