Computation of Earnings Per Share - Calculation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Numerator
Net income	$ 35,283	$ 37,094	$ 63,332
Determination of shares (in thousands)
Weighted-average common shares outstanding (in shares)	4,918	4,908	4,920
Dilutive effect - share-based awards (in shares)	24	39	77
Diluted weighted-average common shares outstanding (in shares)	4,942	4,947	4,997
Earnings per common share
Basic (in dollars per share)	$ 7.17	$ 7.56	$ 12.87
Diluted (in dollars per share)	$ 7.14	$ 7.50	$ 12.68