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Earnings Per Common Share (Computation Of Earnings Per Share) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
May 28, 2020
Basic        
Net income $ 18,164 $ 18,453 $ 29,608  
Earnings allocated to participating securities (Series C preferred stock)     (2,280)  
Net income attributable to common stockholders $ 18,164 $ 18,453 $ 27,328  
Weighted average common shares outstanding including unvested share-based payment awards 6,508,064 6,605,278 6,072,829  
Less: Unvested share-based payment awards-2019 Plan (111,011) (97,122) (43,732)  
Average shares 6,397,053 6,508,156 6,029,097  
Basic earnings per common share $ 2.84 $ 2.84 $ 4.53  
Diluted        
Net earnings allocated to common stockholders $ 18,164 $ 18,453 $ 27,328  
Weighted average common shares outstanding for basic earnings per common share 6,397,053 6,508,156 6,029,097  
Add: Dilutive effects of assumed exercises of stock options 27,096 45,169 34,158  
Add: Dilutive effects of unvested share-based payment awards-2019 Plan 111,011 97,122 43,732  
Average shares and dilutive potential common shares 6,535,160 6,650,447 6,106,987  
Diluted earnings per common share $ 2.78 $ 2.77 $ 4.47  
Series C Preferred Stock [Member]        
Diluted        
Number of outstanding shares 0     12,607
Non-Voting Common Stock [Member]        
Diluted        
Shares authorized 1,260,700 1,260,700   1,260,700