CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	Stockholders' Equity	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Non- controlling Interests
Beginning Balance (in shares) at Dec. 31, 2012			19,930,772
Beginning Balance at Dec. 31, 2012	$ 142,431	$ 141,140	$ 199	$ 164,972	$ (1,693)	$ (22,338)	$ 1,291
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)			152,371,933
Issuances of common stock	1,502,527	1,502,527	$ 1,524	1,501,003
Common stock offering costs, commissions and dealer manager fees	(149,210)	(149,210)		(149,210)
Common stock issued through distribution reinvestment plan (in shares)			1,984,370
Common stock issued though distribution reinvestment plan	$ 18,852	18,852	$ 20	18,832
Common stock repurchases, inclusive of fees and expenses (in shares)	(195,395)		(195,395)
Common stock repurchases, inclusive of fees and expenses	$ (1,886)	(1,886)	$ (2)	(1,884)
Equity-based compensation (in shares)			28,728
Equity-based compensation	232	232	$ 0	232
Redemption of OP units by affiliates	(1,000)	(247)		(247)			(753)
Distributions to non-controlling interest holders	(65)						(65)
Dividends declared	(44,391)	(44,391)				(44,391)
Net loss	(19,311)	(19,279)				(19,279)	(32)
Other comprehensive income	1,080	1,080			1,080
Ending Balance (in shares) at Dec. 31, 2013			174,120,408
Ending Balance at Dec. 31, 2013	1,449,259	1,448,818	$ 1,741	1,533,698	(613)	(86,008)	441
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)			18,908
Issuances of common stock	184	184	$ 0	184
Common stock offering costs, commissions and dealer manager fees	(95)	(95)		(95)
Common stock issued through distribution reinvestment plan (in shares)			2,002,008
Common stock issued though distribution reinvestment plan	$ 19,019	19,019	$ 20	18,999
Common stock repurchases, inclusive of fees and expenses (in shares)	(5,000)		(14,175,115)
Common stock repurchases, inclusive of fees and expenses		(153,763)	$ (141)	(153,622)
Equity-based compensation (in shares)			215,730
Equity-based compensation	$ 7,752	2,457	$ 2	2,455			5,295
Redemption of OP units by affiliates	(698)						(698)
Distributions to non-controlling interest holders	(780)	0					(780)
Dividends declared	(76,442)	(76,442)				(76,442)
Net loss	(94,285)	(93,028)				(93,028)	(1,257)
Other comprehensive income	(203)	(203)			(203)
Contributions from non-controlling interest holders of affiliates	750						750
Issuance of OP units to affiliates	44,979						44,979
Ending Balance (in shares) at Dec. 31, 2014			162,181,939
Ending Balance at Dec. 31, 2014	1,195,677	1,146,947	$ 1,622	1,401,619	(816)	(255,478)	48,730
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued though distribution reinvestment plan	0
Equity-based compensation (in shares)			255,121
Equity-based compensation	15,180	1,035	$ 3	1,032			14,145
Redemption of OP units by affiliates	0	974	$ 1	973			(974)
Distributions to non-controlling interest holders	(3,184)	0					(3,184)
Dividends declared	(74,714)	(74,714)				(74,714)
Net loss	(40,269)	(39,081)				(39,081)	(1,188)
Other comprehensive income	(421)	(421)			(421)
OP units converted to common stock (in shares)			92,751
Ending Balance (in shares) at Dec. 31, 2015			162,529,811
Ending Balance at Dec. 31, 2015	$ 1,092,269	$ 1,034,740	$ 1,626	$ 1,403,624	$ (1,237)	$ (369,273)	$ 57,529