NET INCOME PER SHARE (Calculation of Net Income per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Net income	$ 29,234	$ 15,089	$ 75,298	$ 44,942
Basic:
Basic weighted average EPS shares	35,723	24,200	35,699	24,171
Basic net income per share	$ 0.82	$ 0.62	$ 2.11	$ 1.86
Diluted:
Basic weighted average EPS shares	35,723	24,200	35,699	24,171
Dilutive common stock equivalents	21	23	23	30
Dilutive EPS shares	35,744	24,223	35,722	24,201
Diluted net income per share	$ 0.82	$ 0.62	$ 2.11	$ 1.86
Anti-dilutive shares	6	5	6	3