Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2021		Dec. 31, 2020	Dec. 31, 2019	Sep. 24, 2021
Earnings Per Share [Abstract]
Stock dividend, percent		300.00%	[1]	300.00%	300.00%	300.00%
Net Income		$ 49,857		$ 40,827	$ 37,475
Weighted Average Shares - Basic (in shares)	[2]	16,018		15,929	15,849
Earnings Per Share - Basic (in dollars per share)	[2]	$ 3.11		$ 2.56	$ 2.36
Dilutive Average Shares Attributable to Stock Options (in shares)		55		15	47
Weighted Average Shares - Diluted (in shares)	[2]	16,073		15,944	15,896
Earnings Per Share - Diluted (in dollars per share)	[2]	$ 3.10		$ 2.56	$ 2.36

[1] Included in the shares issued for the 3% stock dividend in 2021 were treasury shares of 139,237

[2] Share and Per Share Amounts have been restated for the September 24, 2021 3% stock dividend.