NET INCOME PER SHARE (Calculation of Net Income per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Net income	$ 10,813	$ 11,225
Basic:
Basic weighted average EPS shares	23,975	24,928
Basic net income per share	$ 0.45	$ 0.45
Diluted:
Basic weighted average EPS shares	23,975	24,928
Dilutive common stock equivalents	248	121
Dilutive EPS shares	24,223	25,049
Diluted net income per share	$ 0.45	$ 0.45
Anti-dilutive shares	7	9