Computation of Earnings Per Share - Calculation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Numerator
Net income	$ 10,524	$ 11,517
Determination of shares (in thousands)
Weighted-average common shares outstanding (in shares)	4,906	4,928
Dilutive effect – share-based awards (in shares)	21	22
Diluted weighted-average common shares outstanding (in shares)	4,927	4,950
Earnings per common share
Basic (in dollars per share)	$ 2.15	$ 2.34
Diluted (in dollars per share)	$ 2.14	$ 2.33