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 Income (Loss)	Accumulated Deficit	Total 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	(95)		(95)			(95)
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	(57,757)				(57,757)	(57,757)
Contributions from non-controlling interest holders of affiliates	750						750
Issuance of OP units to affiliates	11,500						11,500
Equity-based compensation (in shares)		218,845
Equity-based compensation	4,548		1,236			1,236	3,312
Distributions to non-controlling interest holders	(414)						(414)
Other comprehensive income	254			254		254
Net loss	(66,381)				(65,698)	(65,698)	(683)
Ending Balance at Sep. 30, 2014	$ 1,207,104	$ 1,620	$ 1,400,400	$ (359)	$ (209,463)	$ 1,192,198	$ 14,906
Ending Balance (in shares) at Sep. 30, 2014		162,185,052