Computation of Earnings Per Share - Summary of Calculation of Basic Earnings Per Common Share and Diluted Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net income	$ 253,235	$ 138,340	$ 113,719
Denominator:
Denominator for basic earnings per share–weighted average common shares	26,322	26,140	25,952
Dilutive effect of share-based awards	385	452	483
Denominator for diluted earnings per share–adjusted weighted average common shares	26,707	26,592	26,435
Basic Earnings Per Share	$ 9.62	$ 5.29	$ 4.38
Diluted Earnings Per Share	$ 9.48	$ 5.20	$ 4.30