CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive (Loss)	Accumulated Deficit	Stockholders' Equity	Non- controlling Interests
Beginning Balance at Dec. 31, 2013	$ 1,449,259	$ 1,741	$ 1,533,698	$ (613)	$ (86,008)	$ 1,448,818	$ 441
Beginning Balance (in shares) at Dec. 31, 2013		174,120,408
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)		18,908
Issuances of common stock	184		184			184
Common stock offering costs, commissions and dealer manager fees	(51)		(51)			(51)
Common stock issued through distribution reinvestment plan (in shares)		2,002,008
Common stock issued though distribution reinvestment plan	19,019	20	18,999			19,019
Commons stock repurchases (in shares)		(14,175,117)
Common stock repurchases	(153,763)	(141)	(153,622)			(153,763)
Distributions declared	(39,123)				(39,123)	(39,123)
Contributions from non-controlling interest holders	750						750
Issuance of OP units to affiliates	11,500						11,500
Equity-based compensation (in shares)		214,019
Equity-based compensation	2,074		272			272	1,802
Distributions to non-controlling interest holders	(98)						(98)
Other comprehensive loss	(833)			(833)		(833)
Net loss	(75,903)				(75,393)	(75,393)	(510)
Ending Balance at Jun. 30, 2014	$ 1,213,015	$ 1,620	$ 1,399,480	$ (1,446)	$ (200,524)	$ 1,199,130	$ 13,885
Ending Balance (in shares) at Jun. 30, 2014		162,180,226