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Change in Accumulated Other Comprehensive Income (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Reclassification adjustments |  | $ 158 | $ 24 | $ 687
Unrealized Gains And Losses On Available For Sale Securities [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Reclassification adjustments | $ 0 | 158 | 24 | 687
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax | $ 0 | $ 33 | $ 5 | $ 144

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