EQUITY-BASED COMPENSATION (Details 4) - Restricted Stock Awards - Performance-Based $ / shares in Units, $ in Thousands		9 Months Ended
	Mar. 03, 2015 shares	Sep. 30, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($)
Number of Shares
Non-vested at the beginning of period (in shares)		384,558
Granted (in shares)		154,505
Vested (in shares)		(184,666)
Forfeited (in shares)		(46,030)
Non-vested at the end of period (in shares)		308,367
Weighted Average Grant Date Fair Value
Non-vested at the beginning of period (in dollars per share) | $ / shares		$ 6.75
Granted (in dollars per share) | $ / shares		18.78
Vested (in dollars per share) | $ / shares		6.86
Forfeited (in dollars per share) | $ / shares		5.10
Non-vested at the end of period (in dollars per share) | $ / shares		$ 12.95
Aggregate Current Value
Non-vested outstanding | $		$ 3,599	$ 4,784
Executive officers
Number of Shares
Granted (in shares)	154,505
Executive officers | Minimum
Equity-based compensation
Shares earned (as a percent)	0.00%
Executive officers | Maximum
Equity-based compensation
Shares earned (as a percent)	200.00%