STOCK INCENTIVE PLANS - Stock Options Awards Activity (Detail) - $ / shares	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Shares, Options outstanding at beginning of period	892,532	435,340
Shares, Assumed from acquisitions	207,645	1,707,036
Shares, Exercised	(163,455)	(352,094)
Shares, Forfeited/expired	(56,687)	(93,628)
Shares, Options outstanding and exercisable at end of period	880,035	1,696,654
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price, Options outstanding at beginning of period (in USD per share)	$ 8.95	$ 8.86
Weighted Average Exercise Price, Assumed from acquisitions (in USD per share)	8.92	7.83
Weighted Average Exercise Price, Exercised (in USD per share)	9.41	6.89
Weighted Average Exercise Price, Forfeited/expired (in USD per share)	11.16	6.74
Weighted Average Exercise Price, Options outstanding and exercisable at end of period (in USD per share)	$ 8.72	$ 8.35