CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Cumulative effect of Topic 326 adoption	Common Stock	Additional Paid-in Capital	Cumulative Distributions in Excess of Net Income	Cumulative Distributions in Excess of Net Income Cumulative effect of Topic 326 adoption	Accumulated Other Comprehensive (Loss) Income
Beginning balance (in shares) at Dec. 31, 2019			205,208,018
Beginning balance at Dec. 31, 2019	$ 3,488,460	$ (167)	$ 2,052	$ 4,072,079	$ (573,283)	$ (167)	$ (12,388)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	64,840				64,840
Other comprehensive (loss) income	(43,253)						(43,253)
Amortization of stock-based compensation	5,957			5,957
Common stock issuance, net (in shares)			352,662
Common stock issuance, net	705		$ 4	701
Common dividends	(155,291)				(155,291)
Ending balance (in shares) at Jun. 30, 2020			205,560,680
Ending balance at Jun. 30, 2020	3,361,251		$ 2,056	4,078,737	(663,901)		(55,641)
Beginning balance (in shares) at Mar. 31, 2020			205,559,356
Beginning balance at Mar. 31, 2020	3,395,213		$ 2,056	4,075,781	(631,251)		(51,373)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	29,623				29,623
Other comprehensive (loss) income	(4,268)						(4,268)
Amortization of stock-based compensation	2,969			2,969
Common stock issuance, net (in shares)			1,324
Common stock issuance, net	(13)		$ 0	(13)
Common dividends	(62,273)				(62,273)
Ending balance (in shares) at Jun. 30, 2020			205,560,680
Ending balance at Jun. 30, 2020	3,361,251		$ 2,056	4,078,737	(663,901)		(55,641)
Beginning balance (in shares) at Dec. 31, 2020			210,560,815
Beginning balance at Dec. 31, 2020	3,409,228		$ 2,106	4,163,228	(716,195)		(39,911)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(99,126)				(99,126)
Other comprehensive (loss) income	23,737						23,737
Amortization of stock-based compensation	5,692			5,692
Common stock issuance, net (in shares)			10,263,289
Common stock issuance, net	172,715		$ 102	172,613
Common dividends	(129,183)				(129,183)
Ending balance (in shares) at Jun. 30, 2021			220,824,104
Ending balance at Jun. 30, 2021	3,383,063		$ 2,208	4,341,533	(944,504)		(16,174)
Beginning balance (in shares) at Mar. 31, 2021			215,930,202
Beginning balance at Mar. 31, 2021	3,503,404		$ 2,159	4,254,134	(746,516)		(6,373)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(132,573)				(132,573)
Other comprehensive (loss) income	(9,801)						(9,801)
Amortization of stock-based compensation	2,857			2,857
Common stock issuance, net (in shares)			4,893,902
Common stock issuance, net	84,591		$ 49	84,542
Common dividends	(65,415)				(65,415)
Ending balance (in shares) at Jun. 30, 2021			220,824,104
Ending balance at Jun. 30, 2021	$ 3,383,063		$ 2,208	$ 4,341,533	$ (944,504)		$ (16,174)