Net Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net Earnings
Basic Earnings Per Share	$ 3,452,000	$ 4,121,000
Effect Of Dilutive Securities: Restricted Stock Units	0	0
Effect Of Dilutive Securities: Shares Held In Deferred Comp Plan	0	0
Diluted Earnings Per Share	$ 3,452,000	$ 4,121,000
Weighted Average Number Of Shares
Basic Earnings Per Share (in Shares)	5,497,107	5,631,414
Effect Of Dilutive Securities: Restricted Stock Units (in Shares)	13,159	12,169
Effect Of Dilutive Securities: Shares Held In Deferred Comp Plan	163,038	156,662
Diluted Earnings Per Share (in Shares)	5,673,304	5,800,245
Per Share Amount
Basic Earnings Per Share	$ 0.63	$ 0.73
Diluted Earnings Per Share	$ 0.61	$ 0.71