SEGMENT DISCLOSURE - Reconciliation Of Segment Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Segment disclosure
Asset management and other fees to related parties	$ (8,700)	$ (8,631)
Interest expense	(9,773)	(6,815)
General and administrative	(1,679)	(1,942)
Transaction costs	(13)	(149)
Depreciation and amortization	(17,231)	(18,058)
Gain on sale of real estate	187,734	24,739
INCOME FROM CONTINUING OPERATIONS BEFORE PROVISION FOR INCOME TAXES	194,327	26,483
Provision for income taxes	(392)	(190)
NET INCOME FROM CONTINUING OPERATIONS	193,935	26,293
Discontinued Operations
Income from operations of assets held for sale	0	690
NET INCOME FROM DISCONTINUED OPERATIONS	0	690
NET INCOME	193,935	26,983
Net income attributable to noncontrolling interests	(5)	(3)
NET INCOME ATTRIBUTABLE TO THE COMPANY	193,930	26,980
Reportable segments
Segment disclosure
INCOME FROM CONTINUING OPERATIONS BEFORE PROVISION FOR INCOME TAXES	42,115	35,342
Corporate and Reconciling Items
Segment disclosure
Asset management and other fees to related parties	(7,856)	(7,701)
Interest expense	(9,631)	(6,626)
General and administrative	(791)	(1,064)
Transaction costs	(13)	(149)
Depreciation and amortization	(17,231)	(18,058)
Gain on sale of real estate	$ 187,734	$ 24,739