Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net income	$ 32,909	$ 11,873
Basic weighted average shares of Common Stock outstanding	32,945,970	32,692,895
Dilutive effect of stock options, restricted stock awards and restricted stock units	443,621	176,254
Diluted weighted average shares of Common Stock outstanding	33,389,591	32,869,149
Basic earnings per share	$ 1.00	$ 0.36
Diluted earnings per share	$ 0.99	$ 0.36
Anti-dilutive securities share impact		682,741