CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect in Period of Adoption	Common Stock	Additional Paid-in Capital	Cumulative Distributions in Excess of Net Income	Cumulative Distributions in Excess of Net Income Cumulative Effect in Period of Adoption	Accumulated Other Comprehensive Income (Loss)
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 income	35,217				35,217
Other comprehensive income (loss)	(38,985)						(38,985)
Amortization of stock-based compensation	2,988			2,988
Common stock issuance, net (in shares)			351,338
Common stock issuance, net	718		$ 4	714
Common dividends	(93,018)				(93,018)
Ending balance (in shares) at Mar. 31, 2020			205,559,356
Ending balance at Mar. 31, 2020	3,395,213		$ 2,056	4,075,781	(631,251)		(51,373)
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 income	33,447				33,447
Other comprehensive income (loss)	33,538						33,538
Amortization of stock-based compensation	2,835			2,835
Common stock issuance, net (in shares)			5,369,387
Common stock issuance, net	88,124		$ 53	88,071
Common dividends	(63,768)				(63,768)
Ending balance (in shares) at Mar. 31, 2021			215,930,202
Ending balance at Mar. 31, 2021	$ 3,503,404		$ 2,159	$ 4,254,134	$ (746,516)		$ (6,373)