SEGMENT INFORMATION (Reconciliation of Net Income (Loss) to Net Operating Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Net loss	$ (11,363)	$ (1,785)	$ (6,113)	$ (2,376)	$ (1,436)	$ (1,354)	$ (2,759)	$ (2,133)	$ (21,637)	$ (7,682)	$ (2,440)
Other interest income									(62)	(28)	(15)
Real estate acquisition fees to affiliates									9,423	2,296	836
Real estate acquisition fees and expenses									5,677	1,069	432
General and administrative expenses									2,234	1,974	1,386
Depreciation and amortization									35,380	13,865	1,100
Interest expense									9,751	3,568	300
Total net operating income									31,157	11,597	1,299
Corporate-Level [Member]
Segment Reporting Information [Line Items]
Interest expense									$ 142	$ 103	$ 0