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Accumulated Other Comprehensive Income (Loss) (Summary Of Changes In Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning balance |  |  | $ (57,353) |
Other comprehensive loss | $ (10,733) | $ (20,335) | (7,629) | $ (60,309)
Ending balance | (64,982) |  | (64,982) |
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Other comprehensive loss | (10,733) | (20,335) | (7,629) | (60,309)
Amount Reclassified From Accumulated Other Comprehensive Income (Loss) [Member] | Unrealized Gains (Losses) On Available-For-Sale Securities [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning balance | (54,249) | (40,230) | (57,353) | (256)
Other comprehensive loss before reclassification | (10,733) | (20,335) | (7,794) | (60,309)
Amount reclassified from accumulated other comprehensive (income) loss |  |  | 165 |
Other comprehensive loss | (10,733) | (20,335) | (7,629) | (60,309)
Ending balance | $ (64,982) | $ (60,565) | $ (64,982) | $ (60,565)

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