SEGMENT DISCLOSURE - Results of Operations (Details) - USD ($) $ in Thousands	3 Months Ended								10 Months Ended	12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment disclosure
Asset management and other fees to related parties										$ (33,882)	$ (33,169)	$ (25,222)
Interest expense										(34,385)	(23,630)	(20,250)
General and administrative										(7,961)	(9,402)	(11,042)
Transaction costs										(340)	(1,382)	(1,563)
Depreciation and amortization										(71,968)	(72,361)	(69,047)
Bargain purchase gain										0	0	4,918
Gain on sale of real estate	$ 0	$ 14,927	$ 0	$ 24,739	$ 3,092	$ 0	$ 0	$ 0		39,666	3,092	0
INCOME FROM CONTINUING OPERATIONS BEFORE PROVISION FOR INCOME TAXES										32,358	6,918	13,747
Provision for income taxes										(1,646)	(806)	(604)
Net income from continuing operations	(3,153)	8,382	(810)	26,293	3,697	601	1,802	12		30,712	6,112	13,143
Discontinued operations:
Income from operations of assets held for sale (Note 8)									$ 11,455	3,853	13,140	11,455
Gain on disposition of assets held for sale									0	0	5,151	0
NET INCOME FROM DISCONTINUED OPERATIONS	792	703	1,668	690	7,751	4,640	3,180	2,720	$ 11,455	3,853	18,291	11,455
NET INCOME	(2,361)	9,085	858	26,983	11,448	5,241	4,982	2,732		34,565	24,403	24,598
Net income attributable to noncontrolling interests										(18)	(11)	(220)
NET INCOME ATTRIBUTABLE TO THE COMPANY	$ (2,370)	$ 9,088	$ 849	$ 26,980	$ 11,442	$ 5,242	$ 4,976	$ 2,732		34,547	24,392	24,378
Reportable segments
Segment disclosure
Total segment net operating income										133,406	136,294	129,197
Reconciliation
Segment disclosure
Asset management and other fees to related parties										(30,327)	(29,319)	(25,222)
Interest expense										(33,848)	(22,785)	(19,073)
General and administrative										(4,231)	(6,621)	(5,463)
Transaction costs										(340)	(1,382)	(1,563)
Depreciation and amortization										(71,968)	(72,361)	(69,047)
Bargain purchase gain										0	0	4,918
Gain on sale of real estate										39,666	3,092	0
INCOME FROM CONTINUING OPERATIONS BEFORE PROVISION FOR INCOME TAXES										$ 32,358	$ 6,918	$ 13,747