Computation Of Basic And Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Net income	$ 9,315	$ 7,084	$ 22,711	$ 15,850
Weighted average common shares outstanding - Basic	1,884	1,891	1,885	1,894
Incremental shares outstanding assuming the exercise of dilutive stock options and SARs (share settled)	9	0	4	0
Weighted average common shares outstanding - Diluted	1,893	1,891	1,889	1,894
Basic Earnings per Common Share	$ 4.94	$ 3.75	$ 12.05	$ 8.37
Diluted Earnings per Common Share	$ 4.92	$ 3.75	$ 12.02	$ 8.37