Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Shares of Beneficial Interest	Paid-in Capital	Accumulated Deficit and Distributions in Excess of Net Earnings	Accumulated Other Comprehensive Income	Noncontrolling Interests in Operating Partnership
Beginning balance (in shares) at Dec. 31, 2020		251,702,603
Beginning balance at Dec. 31, 2020	$ 3,792,821	$ 2,517	$ 4,687,823	$ (895,521)	$ (4,379)	$ 2,381
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(14,236)			(14,414)		178
Other comprehensive income	(9,292)				(9,280)	(12)
Distributions on common shares, restricted stock and OP units	(56,029)			(55,909)		(120)
Share-based compensation expense	5,024		4,075			949
Common share issuance related to share-based payment plans, net of shares withheld for employee taxes (in shares)		816,915
Common share issuance related to share-based payment plans, net of shares withheld for employee taxes	(10,081)	$ 8	(10,089)
Ending balance (in shares) at Mar. 31, 2021		252,519,518
Ending balance at Mar. 31, 2021	3,708,207	$ 2,525	4,681,809	(965,844)	(13,659)	3,376
Beginning balance (in shares) at Dec. 31, 2021		268,282,592
Beginning balance at Dec. 31, 2021	4,029,076	$ 2,683	5,171,690	(1,157,888)	4,522	8,069
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(17,445)			(17,407)		(38)
Other comprehensive income	11,427				11,404	23
Distributions on common shares, restricted stock and OP units	(59,760)			(59,580)		(180)
Share-based compensation expense	8,093		6,108			1,985
Common share issuance related to share-based payment plans, net of shares withheld for employee taxes (in shares)		318,729
Common share issuance related to share-based payment plans, net of shares withheld for employee taxes	(2,137)	$ 3	(2,140)
Common share issuance related to employee stock purchase plan (in shares)		71,144
Common share issuance related to employee stock purchase plan	1,985	$ 1	1,984
Ending balance (in shares) at Mar. 31, 2022		268,672,465
Ending balance at Mar. 31, 2022	$ 3,971,239	$ 2,687	$ 5,177,642	$ (1,234,875)	$ 15,926	$ 9,859