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, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Schedule of Equity Method Investments [Line Items]
Earnings (loss) from investment in unconsolidated joint ventures	$ (141)	$ (25)	$ 485	$ 580
Ladder Capital Realty Income Partnership I LP
Schedule of Equity Method Investments [Line Items]
Earnings (loss) from investment in unconsolidated joint ventures	0	0	892	116
Grace Lake JV, LLC
Schedule of Equity Method Investments [Line Items]
Earnings (loss) from investment in unconsolidated joint ventures	230	196	690	685
24 Second Avenue Holdings LLC
Schedule of Equity Method Investments [Line Items]
Earnings (loss) from investment in unconsolidated joint ventures	$ (371)	$ (221)	$ (1,097)	$ (221)