Employee Benefits (Summary Of Activity In Stock Option Plans) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SARs/Options
Outstanding Options, Exercised	(10,604)	(499)	(17,366)
Employee Stock Option and Stock Appreciation Rights (SARs) [Member]
SARs/Options
Outstanding Options, Beginning Balance	329,203	330,703	232,091
Outstanding Options, Granted	177,489	0	138,125
Outstanding Options, Exercised	(14,900)	(1,400)	(31,613)
Outstanding Options, Forfeited	0	0	0
Outstanding Options, Expired	0	(100)	(7,900)
Outstanding Options, Ending Balance	491,792	329,203	330,703
Exercise Price
Outstanding, Weighted-Average Exercise Price, Beginning Balance	$ 20.47	$ 20.44	$ 17.36
Outstanding, Weighted-Average Exercise Price, Granted	21.85	0	23.94
Outstanding, Weighted-Average Exercise Price, Exercised	8.92	12.01	11.83
Outstanding, Weighted-Average Exercise Price, Forfeited	0	0	0
Outstanding, Weighted-Average Exercise Price, Expired	0	18.26	25.83
Outstanding, Weighted-Average Exercise Price, Ending Balance	$ 21.32	$ 20.47	$ 20.44
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$ 3,014
Options Outstanding, Wted. Avg. Remaining Contractual Life (yrs)	6 years 11 months 8 days
Exercisable Options, Ending Balance	204,116	177,875	104,889
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 1,683	$ 1,118	$ 1,203
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Remaining Contractual Term	4 years 9 months 21 days	5 years 3 months 7 days	5 years 8 months 26 days
Exercisable Options, Weighted-Average Exercise Price, Ending Balance	$ 19.20	$ 17.07	$ 15.62