Net Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net Earnings Per Share
Basic Earnings Per Share	$ 4,127	$ 5,307	$ 12,106	$ 11,976
Net Earnings
Diluted Earnings Per Share	$ 4,127	$ 5,307	$ 12,106	$ 11,976
Weighted Average Number Of Shares
Basic Earnings Per Share (in Shares)	5,402,048	5,473,443	5,442,788	5,484,063
Effect Of Dilutive Securities: Restricted Stock Units - unvested	19,070	17,188	18,899	15,090
Effect Of Dilutive Securities: Shares Held In Deferred Comp Plan By Deferred Compensation Trust	166,168	166,937	168,099	165,041
Diluted Earnings Per Share (in Shares)	5,587,286	5,657,568	5,629,786	5,664,194
Per Share Amount
Basic Earnings Per Share	$ 0.76	$ 0.96	$ 2.22	$ 2.18
Diluted Earnings Per Share	$ 0.74	$ 0.93	$ 2.15	$ 2.11