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	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator:
Net income	$ 79,424	$ 37,291
Denominator:
Denominator for basic earnings per share–weighted average common shares	26,391	26,285
Dilutive effect of share-based awards	279	386
Denominator for diluted earnings per share–adjusted weighted average common shares	26,670	26,671
Basic Earnings Per Share	$ 3.01	$ 1.42
Diluted Earnings Per Share	$ 2.98	$ 1.40