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Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Balance | $ 587,668 | $ 530,670 | $ 549,041 | $ 527,976
Balance | 622,218 | 565,951 | 622,218 | 565,951
Unrealized gains and (Losses) on available- for-sale Securities |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Balance | (113,761) | (125,561) | (127,807) | (118,000)
Change in Other comprehensive income (loss) before reclassification, Unrealized gains and Losses on available-for-sale Securities | 19,614 | 31,705 | 33,658 | 24,145
Amount reclassified from accumulated other comprehensive income, unrealized gains and losses on available for-sale-Securities | (18) | (77) | (16) | (78)
Net current period other comprehensive income (loss) | 19,596 | 31,628 | 33,642 | 24,067
Balance | (94,165) | (93,933) | (94,165) | (93,933)
Retirement plans |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Balance | (4,473) | (8,940) | (4,478) | (9,087)
Amount reclassified from accumulated other comprehensive income, unrealized gains and losses on available for-sale-Securities | 3 | 73 | 8 | 220
Net current period other comprehensive income (loss) | 3 | 73 | 8 | 220
Balance | (4,470) | (8,867) | (4,470) | (8,867)
Accumulated Other Comprehensive Income/(Loss) |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Balance | (118,234) | (134,501) | (132,285) | (127,087)
Change in Other comprehensive income (loss) before reclassification, Unrealized gains and Losses on available-for-sale Securities | 19,614 | 31,705 | 33,658 | 24,145
Amount reclassified from accumulated other comprehensive income, unrealized gains and losses on available for-sale-Securities | (15) | (4) | (8) | 142
Net current period other comprehensive income (loss) | 19,599 | 31,701 | 33,650 | 24,287
Balance | $ (98,635) | $ (102,800) | $ (98,635) | $ (102,800)

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