SEGMENT DISCLOSURE - Results of Operations (Details) - USD ($) $ in Thousands	3 Months Ended								10 Months Ended	12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment disclosure
Interest										$ (22,785)	$ (19,073)	$ (17,929)
General and administrative										(8,370)	(7,332)	(2,568)
Asset management and other fees to related parties										(29,319)	(25,222)	(21,767)
Transaction costs										(1,382)	(1,563)	(5,063)
Depreciation and amortization										(72,361)	(69,047)	(68,644)
Bargain purchase gain								$ 4,918			4,918
Gain on sale of real estate	$ 3,092									3,092
INCOME FROM CONTINUING OPERATIONS	3,123	$ 233	$ 998	$ (230)	$ (3,469)	$ 975	$ 4,170	10,284		4,124	11,960	14,679
Discontinued Operations
Income from operations of assets held for sale (Note 7)									$ 12,638	15,128	12,638
Gain on disposition of assets held for sale										5,151
INCOME FROM DISCONTINUED OPERATIONS	8,325	5,008	3,984	2,962	4,056	3,305	4,344	933	$ 12,638	20,279	12,638
NET INCOME	11,448	5,241	4,982	2,732	587	4,280	8,514	11,217		24,403	24,598	14,679
Net loss (income) attributable to noncontrolling interests										(11)	(220)	(213)
NET INCOME ATTRIBUTABLE TO STOCKHOLDERS	$ 11,442	$ 5,242	$ 4,976	$ 2,732	$ 475	$ 4,285	$ 8,399	$ 11,219		24,392	24,378	14,466
Reportable segments
Segment disclosure
Total segment net operating income										133,500	127,410	129,208
Reconciliation
Segment disclosure
Interest										(22,785)	(19,073)	(17,929)
General and administrative										(6,621)	(5,463)	(1,126)
Asset management and other fees to related parties										(29,319)	(25,222)	(21,767)
Transaction costs										(1,382)	(1,563)	(5,063)
Depreciation and amortization										(72,361)	(69,047)	(68,644)
Bargain purchase gain											4,918
Gain on sale of real estate										3,092
INCOME FROM CONTINUING OPERATIONS										$ 4,124	$ 11,960	$ 14,679