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Accumulated Other Comprehensive Income (Loss) (Summary of Changes in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Beginning balance | $ (57,353,000) |
Other comprehensive income (loss) | 10,005,000 | $ (57,097,000)
Ending balance | (47,348,000) | (57,353,000)
Accumulated Other Comprehensive Income (Loss) [Member] |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Other comprehensive income (loss) | 10,005,000 | (57,097,000)
Amount Reclassified From Accumulated Other Comprehensive Income (Loss) [Member] | Unrealized Gains On Available-For-Sale Securities [Member] |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Beginning balance | (57,931,000) | (1,453,000)
Other comprehensive income (loss) before reclassification | 9,924,000 | (56,476,000)
Amount reclassified from accumulated other comprehensive loss | 165,000 | (2,000)
Other comprehensive income (loss) | 10,089,000 | (56,478,000)
Ending balance | (47,842,000) | (57,931,000)
Amount Reclassified From Accumulated Other Comprehensive Income (Loss) [Member] | Unrealized gain on pension liability [Member] |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Beginning balance | 578,000 | 1,197,000
Other comprehensive income (loss) before reclassification | (84,000) | (619,000)
Other comprehensive income (loss) | (84,000) | (619,000)
Ending balance | 494,000 | 578,000
Amount Reclassified From Accumulated Other Comprehensive Income (Loss) [Member] | Accumulated Other Comprehensive Income (Loss) [Member] |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Beginning balance | (57,353,000) | (256,000)
Other comprehensive income (loss) before reclassification | 9,840,000 | (57,095,000)
Amount reclassified from accumulated other comprehensive loss | 165,000 | (2,000)
Other comprehensive income (loss) | 10,005,000 | (57,097,000)
Ending balance | $ (47,348,000) | $ (57,353,000)

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