EARNINGS PER SHARE - Schedule of Calculation of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Numerator:
Net income (loss) attributable to Class A common shareholders	$ 2,802	$ 34,210	$ (2,737)	$ 43,384
Denominator:
Weighted average number of shares of Class A common stock outstanding (in shares)	61,170,006	50,335,095	60,383,447	50,161,553
Add - dilutive effect of:
Diluted weighted average number of shares of Class A common stock outstanding (in shares)	61,976,962	50,929,538	60,383,447	98,148,577
Diluted net income per share of Class A common stock (in dollars per share)	$ 0.05	$ 0.67	$ (0.05)	$ 0.85
Numerator:
Net income (loss) attributable to Class A common shareholders	$ 2,802	$ 34,210	$ (2,737)	$ 43,384
Denominator:
Weighted average number of shares of Class A common stock outstanding (in shares)	61,170,006	50,335,095	60,383,447	50,161,553
Basic net income per share of Class A common stock (in dollars per share)	$ 0.05	$ 0.68	$ (0.05)	$ 0.86
Class A common stock
Numerator:
Net income (loss) attributable to Class A common shareholders	$ 2,802	$ 34,210	$ (2,737)	$ 43,384
Add (deduct) - dilutive effect of:
Amounts attributable to operating partnership’s share of Ladder Capital Corp net income (loss)	0	0	0	43,768
Additional corporate tax (expense) benefit	0	0	0	(4,087)
Diluted Net income (loss) available for Class A common shareholders	$ 2,802	$ 34,210	$ (2,737)	$ 83,065
Denominator:
Weighted average number of shares of Class A common stock outstanding (in shares)	61,170,006	50,335,095	60,383,447	50,161,553
Add - dilutive effect of:
Shares issuable relating to converted Class B common shareholders (in shares)	0	0	0	47,459,814
Incremental shares of unvested Class A restricted stock (in shares)	806,956	594,443	0	527,210
Diluted weighted average number of shares of Class A common stock outstanding (in shares)	61,976,962	50,929,538	60,383,447	98,148,577
Diluted net income per share of Class A common stock (in dollars per share)	$ 0.05	$ 0.67	$ (0.05)	$ 0.85
Numerator:
Net income (loss) attributable to Class A common shareholders	$ 2,802	$ 34,210	$ (2,737)	$ 43,384
Denominator:
Weighted average number of shares of Class A common stock outstanding (in shares)	61,170,006	50,335,095	60,383,447	50,161,553
Basic net income per share of Class A common stock (in dollars per share)	$ 0.05	$ 0.68	$ (0.05)	$ 0.86