Employee Benefit Plans (Restricted Shares Activity And Related Information) (Details) - Restricted Stock - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Restricted Awards Activity
Beginning Balance (in shares)			146,755	158,554
Granted (in shares)			38,512	43,451
Vested (in shares)			(43,135)	(54,400)
Ending Balance (in shares)	142,132	147,605	142,132	147,605
Average Market Price at Grant
Outstanding at period start (in dollars per share)			$ 72.16	$ 67.40
Granted (in dollars per share)			77.21	76.37
Vested (in dollars per share)			71.89	60.69
Outstanding at period end (in dollars per share)	$ 73.86	$ 72.23	$ 73.86	$ 72.23
Stock-based compensation expense associated with restricted shares	$ 738	$ 717	$ 2,083	$ 2,192
Unrecognized stock-based compensation expense associated with restricted shares	$ 5,365		$ 5,365
Weighted average period (in years) in which the above amount is expected to be recognized			2 years 10 months 24 days