SHARE-BASED COMPENSATION - Summary of Restricted Stock Unit Activity (Detail) - Restricted Stock Units (RSUs) - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Balance beginning of period (units)		409,362
Granted (units)		262,555
Vested (units)		(247,528)
Forfeited (units)		(60,241)
Balance end of period (units)		409,362	364,148
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Weighted Average Grant Date Fair Value, beginning of period (in USD per share)		$ 13.87
Weighted Average Grant Date Fair Value, Awards Granted (in USD per share)		28.26
Weighted Average Grant Date Fair Value, Awards Vested (in USD per share)		10.53
Weighted Average Grant Date Fair Value, Awards Forfeited (in USD per share)		10.57
Weighted Average Grant Date Fair Value, end of period (in USD per share)		$ 28.57
Unamortized Compensation Expense	[1]		$ 8,053

[1] Expected to be recognized over the next three years.