STOCK-BASED COMPENSATION - SCHEDULE OF INFORMATION REGARDING RESTRICTED STOCK UNITS OUTSTANDING (Detail) - RSUs outstanding - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs outstanding, number (in shares)	1,204,971	508,880
RSUs vested and expected to vest using estimated forfeiture rates, number (in shares)	981,270
RSUs outstanding, weighted average remaining contractual life (years)	1 year 1 month 6 days
RSUs vested and expected to vest using estimated forfeiture rates, Weighted Average Remaining Contractual Life (years)	1 year
RSUs outstanding, aggregate intrinsic value (in dollars)	$ 18.6
RSUs vested and expected to vest using estimated forfeiture rates, aggregate intrinsic value (in dollars)	$ 15.2