Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Cumulative effect of accounting change	[1]	Common Shares of Beneficial Interest	Paid-in Capital	Accumulated Deficit and Distributions in Excess of Net Earnings	Accumulated Deficit and Distributions in Excess of Net Earnings Cumulative effect of accounting change	[1]	Accumulated Other Comprehensive Loss	Noncontrolling Interests in Operating Partnership and Consolidated Joint Venture
Beginning balance (in shares) at Dec. 31, 2019				191,799,909
Beginning balance at Dec. 31, 2019	$ 1,833,018	$ (500)		$ 1,918	$ 2,582,087	$ (736,861)	$ (500)		$ (14,126)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	23,511					23,511
Other comprehensive loss	(29,172)								(29,172)
Distributions on common shares, restricted stock and OP units	(42,568)					(42,568)
Share-based compensation expense	4,298				4,298
Common share issuance related to share-based payment plans, net of shares withheld for employee taxes (in shares)				216,056
Common share issuance related to share-based payment plans, net of shares withheld for employee taxes	(1,506)			$ 2	(1,508)
Issuance of common shares (in shares)				8,250,000
Issuance of common shares	233,595			$ 83	233,512
Ending balance (in shares) at Mar. 31, 2020				200,265,965
Ending balance at Mar. 31, 2020	$ 2,020,676			$ 2,003	2,818,389	(756,418)			(43,298)
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Beginning balance (in shares) at Dec. 31, 2019				191,799,909
Beginning balance at Dec. 31, 2019	$ 1,833,018	$ (500)		$ 1,918	2,582,087	(736,861)	$ (500)		(14,126)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	56,173
Ending balance (in shares) at Jun. 30, 2020				203,615,707
Ending balance at Jun. 30, 2020	2,131,006			$ 2,036	2,932,040	(767,027)			(36,043)
Beginning balance (in shares) at Mar. 31, 2020				200,265,965
Beginning balance at Mar. 31, 2020	2,020,676			$ 2,003	2,818,389	(756,418)			(43,298)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	32,662					32,662
Other comprehensive loss	7,255								7,255
Distributions on common shares, restricted stock and OP units	(43,271)					(43,271)
Share-based compensation expense	4,449				4,449
Common share issuance related to share-based payment plans, net of shares withheld for employee taxes (in shares)				255,311
Common share issuance related to share-based payment plans, net of shares withheld for employee taxes	2,202			$ 2	2,200
Issuance of common shares (in shares)				3,094,431
Issuance of common shares	107,033			$ 31	107,002
Ending balance (in shares) at Jun. 30, 2020				203,615,707
Ending balance at Jun. 30, 2020	2,131,006			$ 2,036	2,932,040	(767,027)			(36,043)
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) income	(14,236)					(14,414)				178
Other comprehensive loss	(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, 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) income	(27,635)
Ending balance (in shares) at Jun. 30, 2021				261,015,053
Ending balance at Jun. 30, 2021	3,866,175			$ 2,610	4,900,398	(1,036,987)			(4,628)	4,782
Beginning balance (in shares) at Mar. 31, 2021				252,519,518
Beginning balance at Mar. 31, 2021	3,708,207			$ 2,525	4,681,809	(965,844)			(13,659)	3,376
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(13,399)					(13,370)				(29)
Other comprehensive loss	9,051								9,031	20
Distributions on common shares, restricted stock and OP units	(57,897)					(57,773)				(124)
Share-based compensation expense	5,461				3,922					1,539
Common share issuance related to share-based payment plans, net of shares withheld for employee taxes (in shares)				66,431
Common share issuance related to share-based payment plans, net of shares withheld for employee taxes	(107)			$ 1	(108)
Issuance of common shares (in shares)				8,429,104
Issuance of common shares	214,859			$ 84	214,775
Ending balance (in shares) at Jun. 30, 2021				261,015,053
Ending balance at Jun. 30, 2021	$ 3,866,175			$ 2,610	$ 4,900,398	$ (1,036,987)			$ (4,628)	$ 4,782

[1] Refer to Note 2 to the Condensed Consolidated Financial Statements for further discussion of the adoption of ASC 326.