Schedule III - Real Estate and Accumulated Depreciation - Reconciliation of Land, Buildings and Improvements, and Reconciliation of Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
ASSET BASIS
Balance at beginning of period	$ 2,553,428	$ 2,406,269	$ 2,355,723
Additions to land, buildings and improvements	19,918	336,480	151,829
Disposition of land, buildings and improvements	(2,578)	(186,800)	(100,208)
Impairment loss	0	(2,521)	(1,075)
Balance at end of period	2,570,768	2,553,428	2,406,269
ACCUMULATED DEPRECIATION
Balance at beginning of period	383,763	351,821	290,066
Depreciation	109,159	99,013	100,545
Depreciation on assets sold or disposed	(2,596)	(67,071)	(38,790)
Balance at end of period	490,326	$ 383,763	$ 351,821
Aggregate cost of land, buildings, furniture and equipment for federal income tax purposes	$ 2,390,000
Hotel buildings and improvements | Minimum
ACCUMULATED DEPRECIATION
Useful lives	6 years
Hotel buildings and improvements | Maximum
ACCUMULATED DEPRECIATION
Useful lives	40 years
Furniture and equipment | Minimum
ACCUMULATED DEPRECIATION
Useful lives	2 years
Furniture and equipment | Maximum
ACCUMULATED DEPRECIATION
Useful lives	15 years