Computation of Earnings Per Share - Calculation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Numerator
Net income	$ 9,596	$ 21,398
Determination of shares (in thousands)
Weighted-average common shares outstanding	4,915	4,937
Dilutive effect - share-based awards	29	60
Diluted weighted-average common shares outstanding	4,944	4,997
Earnings per common share
Basic	$ 1.95	$ 4.33
Diluted	$ 1.94	$ 4.28