INVESTMENT IN UNCONSOLIDATED JOINT VENTURES - Summary of Allocated Earning from Investment in Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Schedule of Equity Method Investments [Line Items]
Earnings (loss) from investment in unconsolidated joint ventures	$ (25)	$ 326	$ 580	$ 1,662
Ladder Capital Realty Income Partnership I LP
Schedule of Equity Method Investments [Line Items]
Earnings (loss) from investment in unconsolidated joint ventures	0	101	116	987
Grace Lake JV, LLC
Schedule of Equity Method Investments [Line Items]
Earnings (loss) from investment in unconsolidated joint ventures	196	225	685	675
24 Second Avenue Holdings LLC
Schedule of Equity Method Investments [Line Items]
Earnings (loss) from investment in unconsolidated joint ventures	$ (221)	$ 0	$ (221)	$ 0