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) income	(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, 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) income	(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
Common stock issuance costs in excess of proceeds from distribution reinvestment plan (in shares)		21,249
Common stock issuance costs in excess of 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)