SEGMENT INFORMATION (Schedule of Segment Reporting Information, by Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013 segments		Sep. 30, 2012	Dec. 31, 2012		Dec. 31, 2011
Segment Reporting Information [Line Items]
Number of reportable segments				2
Revenues	$ 23,475		$ 8,300	$ 53,517		$ 18,357
Interest expense	3,084		1,030	6,449		2,680
Total net operating income	9,328		3,301	21,330		7,716
Assets	863,002			863,002			349,384
Liabilities	448,109			448,109			137,359
Cash and cash equivalents	139,615		46,979	139,615		46,979	23,518		37,179
Real Estate Segment [Member]
Segment Reporting Information [Line Items]
Revenues	23,204		8,069	52,734		17,714
Interest expense	3,065		1,007	6,354		2,599
Total net operating income	9,083		3,094	20,625		7,143
Assets	714,665			714,665			317,133
Liabilities	444,829			444,829			135,082
Real Estate-Related Segment [Member]
Segment Reporting Information [Line Items]
Revenues	271		231	783		643
Interest expense	0		0	0		0
Total net operating income	245		207	705		573
Assets	14,801			14,801			13,811
Liabilities	8			8			2
Operating Segments [Member]
Segment Reporting Information [Line Items]
Interest expense	3,065		1,007	6,354		2,599
Assets	729,466			729,466			330,944
Liabilities	444,837			444,837			135,084
Corporate-Level [Member]
Segment Reporting Information [Line Items]
Interest expense	19		23	95		81
Assets	133,536	[1]		133,536	[1]		18,440	[1]
Liabilities	3,272	[2]		3,272	[2]		2,275	[2]
Cash and cash equivalents	$ 132,600			$ 132,600			$ 18,200

[1] Total corporate-level assets consisted primarily of proceeds from the Offering being held in the form of cash and cash equivalents of approximately $132.6 million and $18.2 million as of September 30, 2013 and December 31, 2012, respectively.

[2] As of September 30, 2013 and December 31, 2012 corporate-level liabilities consisted primarily of distributions payable and accruals for general and administrative expenses.