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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, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Restricted Awards Activity        
Beginning Balance (in shares)     140,606 146,755
Granted (in shares)     43,819 38,512
Vested (in shares)     (44,317) (43,135)
Ending Balance (in shares) 140,108 142,132 140,108 142,132
Average Market Price at Grant        
Outstanding at period start (in dollars per share)     $ 73.87 $ 72.16
Granted (in dollars per share)     90.56 77.21
Vested (in dollars per share)     72.84 71.89
Outstanding at period end (in dollars per share) $ 78.62 $ 73.86 $ 78.62 $ 73.86
Stock-based compensation expense associated with restricted shares $ 681 $ 738 $ 2,022 $ 2,083
Unrecognized stock-based compensation expense associated with restricted shares $ 5,679   $ 5,679  
Weighted average period (in years) in which the above amount is expected to be recognized     3 years 14 days