Condensed Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Distributions in Excess of Accumulated Net Income	Accumulated Comprehensive Income
Balance at the beginning (in shares) at Dec. 31, 2018		728,558,989
Balance at the beginning, value at Dec. 31, 2018	$ 1,852,314	$ 729	$ 5,585,758	$ (3,735,810)	$ 1,637
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(9,499)			(9,499)
Unrealized loss on derivatives	(112)				(112)
Reclassification to interest expense, net	(432)				(432)
Distributions declared	(13,405)			(13,405)
Stock-based compensation, net	397		397
Balance at the end (in shares) at Mar. 31, 2019		728,558,989
Balance at the end, value at Mar. 31, 2019	1,829,263	$ 729	5,586,155	(3,758,714)	1,093
Balance at the beginning (in shares) at Dec. 31, 2018		728,558,989
Balance at the beginning, value at Dec. 31, 2018	1,852,314	$ 729	5,585,758	(3,735,810)	1,637
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(15,221)
Unrealized loss on derivatives	(316)
Reclassification to interest expense, net	(859)
Balance at the end (in shares) at Jun. 30, 2019		728,722,763
Balance at the end, value at Jun. 30, 2019	1,810,697	$ 729	5,587,350	(3,777,844)	462
Balance at the beginning (in shares) at Mar. 31, 2019		728,558,989
Balance at the beginning, value at Mar. 31, 2019	1,829,263	$ 729	5,586,155	(3,758,714)	1,093
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(5,722)			(5,722)
Unrealized loss on derivatives	(204)				(204)
Reclassification to interest expense, net	(427)				(427)
Distributions declared	(13,408)			(13,408)
Stock-based compensation, net (in shares)		163,774
Stock-based compensation, net	1,195		1,195
Balance at the end (in shares) at Jun. 30, 2019		728,722,763
Balance at the end, value at Jun. 30, 2019	1,810,697	$ 729	5,587,350	(3,777,844)	462
Balance at the beginning (in shares) at Dec. 31, 2019		720,807,884
Balance at the beginning, value at Dec. 31, 2019	1,819,601	$ 721	5,568,707	(3,750,884)	1,057
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(3,486)			(3,486)
Unrealized loss on derivatives	(14,141)				(14,141)
Reclassification to interest expense, net	(145)				(145)
Distributions declared	(13,678)			(13,678)
Stock-based compensation, net	201		201
Proceeds from distribution reinvestment plan (in shares)		21,249
Proceeds from distribution reinvestment plan	(229)		(229)
Balance at the end (in shares) at Mar. 31, 2020		720,829,133
Balance at the end, value at Mar. 31, 2020	1,788,123	$ 721	5,568,679	(3,768,048)	(13,229)
Balance at the beginning (in shares) at Dec. 31, 2019		720,807,884
Balance at the beginning, value at Dec. 31, 2019	1,819,601	$ 721	5,568,707	(3,750,884)	1,057
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(13,097)
Unrealized loss on derivatives	(16,473)
Reclassification to interest expense, net	600
Repurchase of common stock under share repurchase plan (in shares)		(2,136,119)
Proceeds from distribution reinvestment plan (in shares)		79,040
Balance at the end (in shares) at Jun. 30, 2020		718,934,723
Balance at the end, value at Jun. 30, 2020	1,759,532	$ 719	5,564,930	(3,791,301)	(14,816)
Balance at the beginning (in shares) at Mar. 31, 2020		720,829,133
Balance at the beginning, value at Mar. 31, 2020	1,788,123	$ 721	5,568,679	(3,768,048)	(13,229)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(9,611)			(9,611)
Unrealized loss on derivatives	(2,332)				(2,332)
Reclassification to interest expense, net	742				742
Reclassification to interest expense, net	745
Reclassification to equity in (losses) earnings of unconsolidated entities	3				3
Distributions declared	(13,642)			(13,642)
Stock-based compensation, net (in shares)		183,918
Stock-based compensation, net	1,314		1,314
Repurchase of common stock under share repurchase plan (in shares)		(2,136,119)
Repurchase of common stock under share repurchase plan	(5,201)	$ (2)	(5,199)
Proceeds from distribution reinvestment plan (in shares)		57,791
Proceeds from distribution reinvestment plan	136		136
Balance at the end (in shares) at Jun. 30, 2020		718,934,723
Balance at the end, value at Jun. 30, 2020	$ 1,759,532	$ 719	$ 5,564,930	$ (3,791,301)	$ (14,816)