EPS (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Abstract]
Net Income	$ 61,439	$ 69,014	$ 59,486
Dividends and undistributed earnings allocated to participating securities(1)	(162)	(190)	(149)
Net income available to common shareholders	$ 61,277	$ 68,824	$ 59,337
Weighted-average common shares outstanding for basic EPS	14,644,170	14,903,855	14,985,235
Dilutive effect of stock-based awards	56,840	67,723	38,532
Weighted-average common and potential common shares for diluted EPS	14,701,010	14,971,578	15,023,767
Basic EPS	$ 4.18	$ 4.62	$ 3.96
Diluted EPS	$ 4.17	$ 4.60	$ 3.95