Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Total Stockholders' Equity	Noncontrolling Interests
Beginning balance (in shares) at Dec. 31, 2018		204,536,485
Beginning Balance at Dec. 31, 2018	$ 1,890,593	$ 2,045	$ 2,126,472	$ (245,620)	$ 1,882,897	$ 7,696
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation (in shares)		55,916
Share-based compensation	1,157	$ 1	1,073		1,074	83
Common stock repurchased and retired (in shares)		(3,143,922)
Common stock repurchased and retired	(29,998)	$ (31)	(29,967)		(29,998)
Net loss	8,980			8,945	8,945	35
Distributions on common stock/units	(25,504)		113	(25,483)	(25,370)	(134)
Ending balance (in shares) at Mar. 31, 2019		201,448,479
Ending Balance at Mar. 31, 2019	1,829,942	$ 2,015	2,097,691	(277,444)	1,822,262	7,680
Beginning balance (in shares) at Dec. 31, 2019		200,207,795
Beginning Balance at Dec. 31, 2019	1,921,062	$ 2,002	2,089,349	(178,861)	1,912,490	8,572
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation (in shares)		154,981
Share-based compensation	428	$ 1	189		190	238
Redemption of Operating Partnership units	$ (201)		(15)		(15)	(186)
Common stock repurchased and retired (in shares)	(1,119,438)	(1,119,438)
Common stock repurchased and retired	$ (10,000)	$ (11)	(9,989)		(10,000)
Net loss	(34,692)			(34,559)	(34,559)	(133)
Ending balance (in shares) at Mar. 31, 2020		199,243,338
Ending Balance at Mar. 31, 2020	$ 1,876,597	$ 1,992	$ 2,079,534	$ (213,420)	$ 1,868,106	$ 8,491