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Accumulated Other Comprehensive Loss (Schedule Of Changes In Accumulated Other Comprehensive Loss) (Details) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Accumulated Other Comprehensive Loss [Line Items] |  |
Accumulated other comprehensive loss, beginning of period | $ (2,290,000) |
Net current-period other comprehensive gain (loss) | 9,000 | $ (216,000)
Accumulated other comprehensive loss, end of period | (2,281,000) |
Unrealized Gains and Losses on Available-for-Sale Securities [Member] |  |
Accumulated Other Comprehensive Loss [Line Items] |  |
Accumulated other comprehensive loss, beginning of period | (2,290,000) | (2,037,000)
Other comprehensive gain (loss) before reclassifications | 9,000 | (216,000)
Net current-period other comprehensive gain (loss) | 9,000 | (216,000)
Accumulated other comprehensive loss, end of period | (2,281,000) | (2,253,000)
Accumulated other comprehensive loss, end of period | $ 0 | $ 0

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