Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share [Abstract]
Net income (loss)	$ 24,791	$ 32,909	$ (10,322)	$ 11,873	$ 57,700	$ 1,551
Basic weighted average shares of Common Stock outstanding	33,100,230		32,579,549		33,025,432	32,635,322
Dilutive effect of stock options, restricted stock awards and restricted stock units	443,978				443,417	233,392
Diluted weighted average shares of Common Stock outstanding	33,544,208		32,579,549		33,468,849	32,868,714
Basic earnings per share	$ 0.75		$ (0.32)		$ 1.75	$ 0.05
Diluted earnings per share	$ 0.74		$ (0.32)		$ 1.72	$ 0.05
Anti-dilutive securities share impact			894,520			346,596