Employee Benefit Plans (Restricted Shares Activity And Related Information) (Details) - Restricted Stock - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Restricted Awards Activity
Beginning Balance (in shares)	140,606	146,755
Granted (in shares)	17,728	19,034
Vested (in shares)	(25,451)	(25,330)
Ending Balance (in shares)	132,883	140,459
Average Market Price at Grant
Outstanding at period start (in dollars per share)	$ 73.87	$ 72.16
Granted (in dollars per share)	95.64	75.69
Vested (in dollars per share)	74.57	78.77
Outstanding at period end (in dollars per share)	$ 75.48	$ 71.75
Stock-based compensation expense associated with restricted shares	$ 708	$ 662
Unrecognized stock-based compensation expense associated with restricted shares	$ 4,819
Weighted average period (in years) in which the above amount is expected to be recognized	2 years 8 months 12 days