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Other Comprehensive Income (Loss) - Schedule of Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Before-Tax Amount |  |  |  |
Net unrealized gains/losses | $ 9,460 | $ (1,129) | $ 31,169 | $ (14,126)
Tax (Expense) Benefit |  |  |  |
Net unrealized gains/losses and Other comprehensive income (loss) | (2,365) | 275 | (7,792) | 3,461
Net of Tax |  |  |  |
Change in net unrealized (loss) gain during the period | 7,044 | (1,051) | 23,161 | (11,079)
Reclassification adjustment for net realized gains (loss) on sale of available-for-sale debt securities included in net income (loss) | 51 | 197 | 216 | 414
Other comprehensive income (loss) | 7,095 | (854) | 23,377 | (10,665)
Net unrealized gains/losses |  |  |  |
Before-Tax Amount |  |  |  |
Change in net unrealized (loss) gain during the period | 9,392 | (1,391) | 30,881 | (14,675)
Reclassification adjustment for net realized gains (loss) on sale of available-for-sale debt securities included in net income (loss) | 0 | 0 | 0 | 0
Net unrealized gains/losses | 9,392 | (1,391) | 30,881 | (14,675)
Tax (Expense) Benefit |  |  |  |
Change in net unrealized (loss) gain during the period | (2,348) | 340 | (7,720) | 3,596
Reclassification adjustment for net realized gains (loss) on sale of available-for-sale debt securities included in net income (loss) | 0 | 0 | 0 | 0
Net unrealized gains/losses and Other comprehensive income (loss) | (2,348) | 340 | (7,720) | 3,596
Net of Tax |  |  |  |
Change in net unrealized (loss) gain during the period | 7,044 | (1,051) | 23,161 | (11,079)
Reclassification adjustment for net realized gains (loss) on sale of available-for-sale debt securities included in net income (loss) | 0 | 0 | 0 | 0
Other comprehensive income (loss) | 7,044 | (1,051) | 23,161 | (11,079)
Amortization of net retirement plan actuarial gain (loss) |  |  |  |
Before-Tax Amount |  |  |  |
Reclassification adjustment for net realized gains (loss) on sale of available-for-sale debt securities included in net income (loss) | 19 | 215 | 190 | 457
Tax (Expense) Benefit |  |  |  |
Reclassification adjustment for net realized gains (loss) on sale of available-for-sale debt securities included in net income (loss) | (5) | (53) | (48) | (112)
Net of Tax |  |  |  |
Reclassification adjustment for net realized gains (loss) on sale of available-for-sale debt securities included in net income (loss) | 14 | 162 | 142 | 345
Amortization of net retirement plan prior service cost |  |  |  |
Before-Tax Amount |  |  |  |
Reclassification adjustment for net realized gains (loss) on sale of available-for-sale debt securities included in net income (loss) | 49 | 47 | 98 | 92
Tax (Expense) Benefit |  |  |  |
Reclassification adjustment for net realized gains (loss) on sale of available-for-sale debt securities included in net income (loss) | (12) | (12) | (24) | (23)
Net of Tax |  |  |  |
Reclassification adjustment for net realized gains (loss) on sale of available-for-sale debt securities included in net income (loss) | 37 | 35 | 74 | 69
Employee benefit plans |  |  |  |
Before-Tax Amount |  |  |  |
Net unrealized gains/losses | 68 | 262 | 288 | 549
Tax (Expense) Benefit |  |  |  |
Net unrealized gains/losses and Other comprehensive income (loss) | (17) | (65) | (72) | (135)
Net of Tax |  |  |  |
Other comprehensive income (loss) | $ 51 | $ 197 | $ 216 | $ 414

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