STOCK-BASED COMPENSATION - Additional Information Regarding Options Outstanding (Detail)	12 Months Ended
	Dec. 31, 2018 $ / shares shares
Standard stock options | $5.53 - $7.79
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	$ 5.53
Exercise price range, upper range limit	$ 7.79
Number Outstanding (in shares) | shares	321,144
Weighted Average Remaining Contractual Life (Years)	4 years 1 month 27 days
Weighted Average Exercise Price (in dollars per share)	$ 7.21
Number Exercisable (in shares) | shares	189,149
Weighted Average Exercise Price (in dollars per share)	$ 7.06
Standard stock options | 8.09 - 8.45
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	8.09
Exercise price range, upper range limit	$ 8.45
Number Outstanding (in shares) | shares	222,175
Weighted Average Remaining Contractual Life (Years)	4 years 4 months 17 days
Weighted Average Exercise Price (in dollars per share)	$ 8.29
Number Exercisable (in shares) | shares	143,083
Weighted Average Exercise Price (in dollars per share)	$ 8.22
Standard stock options | 8.64 - 9.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	8.64
Exercise price range, upper range limit	$ 9.00
Number Outstanding (in shares) | shares	259,173
Weighted Average Remaining Contractual Life (Years)	2 years 5 months 12 days
Weighted Average Exercise Price (in dollars per share)	$ 8.83
Number Exercisable (in shares) | shares	226,776
Weighted Average Exercise Price (in dollars per share)	$ 8.82
Standard stock options | 9.53 - 9.53
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	9.53
Exercise price range, upper range limit	$ 9.53
Number Outstanding (in shares) | shares	671,500
Weighted Average Remaining Contractual Life (Years)	11 months 12 days
Weighted Average Exercise Price (in dollars per share)	$ 9.53
Number Exercisable (in shares) | shares	671,500
Weighted Average Exercise Price (in dollars per share)	$ 9.53
Standard stock options | 9.68 - 11.84
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	9.68
Exercise price range, upper range limit	$ 11.84
Number Outstanding (in shares) | shares	205,573
Weighted Average Remaining Contractual Life (Years)	5 years 8 months 4 days
Weighted Average Exercise Price (in dollars per share)	$ 11.66
Number Exercisable (in shares) | shares	25,693
Weighted Average Exercise Price (in dollars per share)	$ 10.87
Standard stock options | 11.94 - 12.20
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	11.94
Exercise price range, upper range limit	$ 12.20
Number Outstanding (in shares) | shares	100,963
Weighted Average Remaining Contractual Life (Years)	1 year 6 months 3 days
Weighted Average Exercise Price (in dollars per share)	$ 11.94
Number Exercisable (in shares) | shares	100,963
Weighted Average Exercise Price (in dollars per share)	$ 11.94
Standard stock options | 12.26 - 12.26
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	12.26
Exercise price range, upper range limit	$ 12.26
Number Outstanding (in shares) | shares	21,675
Weighted Average Remaining Contractual Life (Years)	3 years 5 months 4 days
Weighted Average Exercise Price (in dollars per share)	$ 12.26
Number Exercisable (in shares) | shares	21,675
Weighted Average Exercise Price (in dollars per share)	$ 12.26
Standard stock options | 12.38 - 12.38
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	12.38
Exercise price range, upper range limit	$ 12.38
Number Outstanding (in shares) | shares	4,320
Weighted Average Remaining Contractual Life (Years)	3 years 10 months 13 days
Weighted Average Exercise Price (in dollars per share)	$ 12.38
Number Exercisable (in shares) | shares	3,420
Weighted Average Exercise Price (in dollars per share)	$ 12.38
Standard stock options | 12.48 - 12.48
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	12.48
Exercise price range, upper range limit	$ 12.48
Number Outstanding (in shares) | shares	15,900
Weighted Average Remaining Contractual Life (Years)	3 years 6 months 14 days
Weighted Average Exercise Price (in dollars per share)	$ 12.48
Number Exercisable (in shares) | shares	13,912
Weighted Average Exercise Price (in dollars per share)	$ 12.48
Standard stock options | 15.25 - 15.25
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	15.25
Exercise price range, upper range limit	$ 15.25
Number Outstanding (in shares) | shares	40,000
Weighted Average Remaining Contractual Life (Years)	6 years 6 months 14 days
Weighted Average Exercise Price (in dollars per share)	$ 15.25
Number Exercisable (in shares) | shares	0
Weighted Average Exercise Price (in dollars per share)	$ 0.00
Standard stock options | $5.53 - $15.25
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	5.53
Exercise price range, upper range limit	$ 15.25
Number Outstanding (in shares) | shares	1,862,423
Weighted Average Remaining Contractual Life (Years)	2 years 10 months 6 days
Weighted Average Exercise Price (in dollars per share)	$ 9.44
Number Exercisable (in shares) | shares	1,396,171
Weighted Average Exercise Price (in dollars per share)	$ 9.22
Standard stock options | $8.09 - $8.09
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	8.09
Exercise price range, upper range limit	8.09
Standard stock options | 8.65 - 8.65
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	8.65
Exercise price range, upper range limit	$ 8.65
Market condition based stock options | $8.09 - $8.09
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number Outstanding (in shares) | shares	135,000
Weighted Average Remaining Contractual Life (Years)	10 months 27 days
Weighted Average Exercise Price (in dollars per share)	$ 8.09
Number Exercisable (in shares) | shares	135,000
Weighted Average Exercise Price (in dollars per share)	$ 8.09
Market condition based stock options | 8.65 - 8.65
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number Outstanding (in shares) | shares	84,581
Weighted Average Remaining Contractual Life (Years)	10 months 27 days
Weighted Average Exercise Price (in dollars per share)	$ 8.65
Number Exercisable (in shares) | shares	84,581
Weighted Average Exercise Price (in dollars per share)	$ 8.65
Market condition based stock options | 9.00 - 9.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	9.00
Exercise price range, upper range limit	$ 9.00
Number Outstanding (in shares) | shares	52,500
Weighted Average Remaining Contractual Life (Years)	10 months 27 days
Weighted Average Exercise Price (in dollars per share)	$ 9.00
Number Exercisable (in shares) | shares	52,500
Weighted Average Exercise Price (in dollars per share)	$ 9.00
Market condition based stock options | $8.09 - $9.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	8.09
Exercise price range, upper range limit	$ 9.00
Number Outstanding (in shares) | shares	272,081
Weighted Average Remaining Contractual Life (Years)	10 months 27 days
Weighted Average Exercise Price (in dollars per share)	$ 8.44
Number Exercisable (in shares) | shares	272,081
Weighted Average Exercise Price (in dollars per share)	$ 8.44