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Change in Accumulated Other Comprehensive Income (Loss) (Changes To Accumulated Other Comprehensive Income (Loss) By Components) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Accumulated Other Comprehensive Income Loss [Line Items]    
Beginning balance $ 1,482 $ (1,553)
Other comprehensive income (loss) before reclassifications 2,960 3,835
Reclassifications from other comprehensive income (loss) (684) 7
Tax effect of current period changes (479) (807)
Total other comprehensive income 1,797 3,035
Ending balance 3,279 1,482
Unrealized Gains And Losses On Available For Sale Securities [Member]    
Accumulated Other Comprehensive Income Loss [Line Items]    
Beginning balance 1,438 (1,597)
Other comprehensive income (loss) before reclassifications 2,993 3,835
Reclassifications from other comprehensive income (loss) (687) 7
Tax effect of current period changes (484) (807)
Total other comprehensive income 1,822 3,035
Ending balance 3,260 1,438
Change In Benefit Obligations And Plan Assets For The Post Retirement Benefit Plan [Member]    
Accumulated Other Comprehensive Income Loss [Line Items]    
Beginning balance 44 44
Other comprehensive income (loss) before reclassifications (33)  
Reclassifications from other comprehensive income (loss) 3  
Tax effect of current period changes 5  
Total other comprehensive income (25)  
Ending balance $ 19 $ 44