CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Total Stockholders’ Equity	Preferred Stock	Common Stock	Additional Paid-in Capital	Cumulative Distributions in Excess of Net Income	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests
Beginning balance (in shares) at Dec. 31, 2017			5,750,000	178,255,843
Beginning balance at Dec. 31, 2017	$ 3,437,249	$ 3,432,807	$ 58	$ 1,783	$ 3,636,913	$ (217,236)	$ 11,289	$ 4,442
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	62,481	62,471				62,471		10
Other comprehensive income (loss)	8,729	8,729					8,729
Distributions to noncontrolling interests	(37)							(37)
Amortization of stock-based compensation	1,398	1,398			1,398
Common stock issuance, net (in shares)				26,527
Common stock issuance, net	(202)	(202)			(202)
Preferred dividends	(2,561)	(2,561)				(2,561)
Common dividends	(80,491)	(80,491)				(80,491)
Ending balance (in shares) at Mar. 31, 2018			5,750,000	178,282,370
Ending balance at Mar. 31, 2018	3,426,566	3,422,151	$ 58	$ 1,783	3,638,109	(238,612)	20,813	4,415
Beginning balance (in shares) at Dec. 31, 2018			0	178,306,528
Beginning balance at Dec. 31, 2018	3,254,747	3,250,414	$ 0	$ 1,783	3,507,925	(271,595)	12,301	4,333
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	(77,692)	(77,704)				(77,704)		12
Other comprehensive income (loss)	(14,048)	(14,048)					(14,048)
Distributions to noncontrolling interests	(36)							(36)
Amortization of stock-based compensation	3,270	3,270			3,270
Common stock issuance, net (in shares)				113,071
Common stock issuance, net	(2,207)	(2,207)		$ 1	(2,208)
Common dividends	(80,754)	(80,754)				(80,754)
Ending balance (in shares) at Mar. 31, 2019			0	178,419,599
Ending balance at Mar. 31, 2019	$ 3,050,778	$ 3,046,469	$ 0	$ 1,784	$ 3,508,987	$ (462,555)	$ (1,747)	$ 4,309