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Change in Accumulated Other Comprehensive Income (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Accumulated Other Comprehensive Income Loss [Line Items]    
Reclassification adjustments $ 76  
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax 16  
Unrealized Gains And Losses On Available For Sale Securities [Member]    
Accumulated Other Comprehensive Income Loss [Line Items]    
Reclassification adjustments $ 76 $ 0