STOCK-BASED COMPENSATION - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 1.0	$ 0.9
Share-based compensation expense, net of tax	$ 0.8	$ 0.6
Options granted (in shares)	72,521
Options granted (in dollars per share)	$ 48.33
Award vesting period	1 year
Expiration period	7 years
Compensation not yet recognized	$ 1.3
Compensation cost not yet recognized, period for recognition	2 years 10 months 2 days
Stock Incentive Plan 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, outstanding (in shares)	2,096,535
Number of shares available for grant (in shares)	276,508
Award vesting rights	25.00%
Restricted Stock And Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 0.6
Award vesting period	4 years
Granted (in shares)	44,177
RSU granted (in dollars per share)	$ 48.40
Compensation not yet recognized, Share-based awards other than options	$ 3.8
Weighted average remaining contractual terms	2 years 10 months 28 days
Non-vested Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 0.3