INVESTMENT IN UNCONSOLIDATED JOINT VENTURES - Summary of Allocated Earning from Investment in Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Schedule of Equity Method Investments [Line Items]
Earnings from investment in unconsolidated joint ventures	$ (168)	$ 164	$ 626	$ 605
Ladder Capital Realty Income Partnership I LP
Schedule of Equity Method Investments [Line Items]
Earnings from investment in unconsolidated joint ventures	0	14	892	116
Grace Lake JV, LLC
Schedule of Equity Method Investments [Line Items]
Earnings from investment in unconsolidated joint ventures	235	150	460	489
24 Second Avenue Holdings LLC
Schedule of Equity Method Investments [Line Items]
Earnings from investment in unconsolidated joint ventures	$ (403)	$ 0	$ (726)	$ 0