Earnings per Common Share (Calculation of Earnings per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net income	$ 12,812	$ 16,483
Less dividends and undistributed earnings allocated to participating securities	(29)	(54)
Net income available to common shareholders	$ 12,783	$ 16,429
Weighted average common shares outstanding - basic	17,074,000	17,331,000
Dilutive effect of common stock equivalents	96,000	151,000
Weighted average common shares outstanding - diluted	17,170,000	17,482,000
Basic earnings per common share	$ 0.75	$ 0.95
Diluted earnings per common share	$ 0.74	$ 0.94
Antidilutive common stock equivalents	303,982	94,175