STOCK-BASED COMPENSATION - SCHEDULE OF INFORMATION REGARDING STANDARD AND MARKET CONDITION BASED STOCK OPTIONS OUTSTANDING (Detail) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Standard Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock options outstanding (in shares)	3,533,204	3,421,121
Options vested and expected to vest using estimated forfeiture rates, number (in shares)	3,358,207
Options exercisable, number (in shares)	2,388,508
Options outstanding, Weighted Average Exercise Price (in dollars per share)	$ 8.47
Options vested and expected to vest using estimated forfeiture rates, Weighted Average Exercise Price (in dollars per share)	8.45
Options exercisable, Weighted Average Exercise Price (in dollars per share)	$ 8.31
Options outstanding, Weighted Average Remaining Contractual Life (years)	3 years 8 months 23 days
Options vested and expected to vest using estimated forfeiture rates, Weighted Average Remaining Contractual Life (years)	3 years 7 months 13 days
Options exercisable, weighted average remaining contractual (years)	2 years 10 months 2 days
Options outstanding, aggregate intrinsic value (in dollars)	$ 4.8
Options vested and expected to vest using estimated forfeiture rates, Aggregate Intrinsic Value (in dollars)	4.7
Options exercisable, aggregate intrinsic value (in dollars)	$ 4.0
Market Condition Based Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock options outstanding (in shares)	345,830	225,000
Options vested and expected to vest using estimated forfeiture rates, number (in shares)	318,584
Options exercisable, number (in shares)	84,375
Options outstanding, Weighted Average Exercise Price (in dollars per share)	$ 8.48
Options vested and expected to vest using estimated forfeiture rates, Weighted Average Exercise Price (in dollars per share)	8.47
Options exercisable, Weighted Average Exercise Price (in dollars per share)	$ 8.09
Options outstanding, Weighted Average Remaining Contractual Life (years)	5 years 8 months 1 day
Options vested and expected to vest using estimated forfeiture rates, Weighted Average Remaining Contractual Life (years)	5 years 7 months 13 days
Options exercisable, weighted average remaining contractual (years)	4 years 8 months 1 day
Options outstanding, aggregate intrinsic value (in dollars)	$ 0.0
Options vested and expected to vest using estimated forfeiture rates, Aggregate Intrinsic Value (in dollars)	0.0
Options exercisable, aggregate intrinsic value (in dollars)	$ 0.0