Employee Benefit Plans (Restricted Shares Activity And Related Information) (Details) - Restricted Stock - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Restricted Awards Activity
Beginning Balance (in shares)			146,755	158,554
Granted (in shares)			33,159	38,036
Vested (in shares)			(41,635)	(52,050)
Ending Balance (in shares)	138,279	144,540	138,279	144,540
Average Market Price at Grant
Outstanding at period start (in dollars per share)			$ 72.16	$ 67.40
Granted (in dollars per share)			77.54	76.65
Vested (in dollars per share)			72.54	61.23
Outstanding at period end (in dollars per share)	$ 73.58	$ 71.75	$ 73.58	$ 71.75
Stock-based compensation expense associated with restricted shares	$ 683	$ 691	$ 1,345	$ 1,475
Unrecognized stock-based compensation expense associated with restricted shares	$ 5,699		$ 5,699
Weighted average period (in years) in which the above amount is expected to be recognized			3 years 1 month 6 days