STOCKHOLDERS' EQUITY - Summary of Stock Option Activity (Detail) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) $ / shares shares
Stock Options
Beginning balance, outstanding (in shares)	1,115
Granted (in shares)	0
Exercised (in shares)	(33)
Forfeited (in shares)	(2)
Ending balance, outstanding (in shares)	1,080
Exercisable at end of period (in shares)	747
Unvested at end of period (in shares)	373
Weighted Average Exercise Price
Beginning balance, Outstanding (in USD per share) | $ / shares	$ 6.13
Granted (in USD per share) | $ / shares	0.00
Exercised (in USD per share) | $ / shares	11.01
Forfeited (in USD per share) | $ / shares	4.06
Ending balance, Outstanding (in USD per share) | $ / shares	5.98
Exercisable at end of period (in USD per share) | $ / shares	5.51
Unvested at end of period (in USD per share) | $ / shares	$ 7.62
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted Average Remaining Contractual Term, Outstanding	5 years 8 months 12 days
Weighted Average Remaining Contractual Term, Exercisable	4 years 6 months
Weighted Average Remaining Contractual Term, Unvested	8 years 4 months 24 days
Aggregate Intrinsic Value, Outstanding at end of period | $	$ 8,787
Aggregate Intrinsic Value, Exercisable at end of period | $	6,431
Aggregate Intrinsic Value, Unvested at end of period | $	$ 2,421
Market-based Performance Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Percentage of vesting of share-based compensation awards	100.00%
Issuance of additional shares (in shares)	40