Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net income (loss)	$ 15,686	$ 24,791	$ 32,909	$ 24,146	$ (10,322)	$ 11,873	$ 73,386	$ 25,697
Basic weighted average shares of Common Stock outstanding	33,177,743			32,623,532			33,075,399	32,631,423
Dilutive effect of stock options, restricted stock awards and restricted stock units	431,341			334,907			413,501	292,590
Diluted weighted average shares of Common Stock outstanding	33,609,084			32,958,439			33,488,900	32,924,013
Basic earnings per share	$ 0.47			$ 0.74			$ 2.22	$ 0.79
Diluted earnings per share	$ 0.47			$ 0.73			$ 2.19	$ 0.78
Anti-dilutive securities share impact				12,000				179,500