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Other Comprehensive Income (Loss) - Schedule of Reclassifications (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Before-Tax Amount |  |  |  |
Net unrealized gains/losses / Other comprehensive income (loss) | $ (56,977) | $ 12,011 | $ (162,787) | $ (20,940)
Tax (Expense) Benefit |  |  |  |
Net unrealized gains/losses / Other comprehensive income (loss) | 13,957 | (2,943) | 39,868 | 5,132
Net of Tax |  |  |  |
Change in net unrealized gain/loss during the period | (43,449) | 8,489 | (123,854) | (16,757)
Reclassification adjustment for net realized loss on sale of available-for-sale debt securities included in net income | 429 | 579 | 935 | 949
Other comprehensive (loss) income | (43,020) | 9,068 | (122,919) | (15,808)
Net unrealized gain/loss |  |  |  |
Before-Tax Amount |  |  |  |
Change in net unrealized gain/loss during the period | (57,544) | 11,244 | (164,025) | (22,197)
Reclassification adjustment for net realized loss on sale of available-for-sale debt securities included in net income | 0 | 0 | 0 | (330)
Net unrealized gains/losses / Other comprehensive income (loss) | (57,544) | 11,244 | (164,025) | (22,527)
Tax (Expense) Benefit |  |  |  |
Change in net unrealized gain/loss during the period | 14,095 | (2,755) | 40,171 | 5,440
Reclassification adjustment for net realized loss on sale of available-for-sale debt securities included in net income | 0 | 0 | 0 | 81
Net unrealized gains/losses / Other comprehensive income (loss) | 14,095 | (2,755) | 40,171 | 5,521
Net of Tax |  |  |  |
Change in net unrealized gain/loss during the period | (43,449) | 8,489 | (123,854) | (16,757)
Reclassification adjustment for net realized loss on sale of available-for-sale debt securities included in net income | 0 | 0 | 0 | (249)
Other comprehensive (loss) income | (43,449) | 8,489 | (123,854) | (17,006)
Amortization of net retirement plan actuarial gain/loss |  |  |  |
Before-Tax Amount |  |  |  |
Reclassification adjustment for net realized loss on sale of available-for-sale debt securities included in net income | 514 | 712 | 1,129 | 1,476
Tax (Expense) Benefit |  |  |  |
Reclassification adjustment for net realized loss on sale of available-for-sale debt securities included in net income | (125) | (175) | (276) | (362)
Net of Tax |  |  |  |
Reclassification adjustment for net realized loss on sale of available-for-sale debt securities included in net income | 389 | 537 | 853 | 1,114
Amortization of net retirement plan prior service cost |  |  |  |
Before-Tax Amount |  |  |  |
Reclassification adjustment for net realized loss on sale of available-for-sale debt securities included in net income | 53 | 55 | 109 | 111
Tax (Expense) Benefit |  |  |  |
Reclassification adjustment for net realized loss on sale of available-for-sale debt securities included in net income | (13) | (13) | (27) | (27)
Net of Tax |  |  |  |
Reclassification adjustment for net realized loss on sale of available-for-sale debt securities included in net income | 40 | 42 | 82 | 84
Employee benefit plans |  |  |  |
Before-Tax Amount |  |  |  |
Net unrealized gains/losses / Other comprehensive income (loss) | 567 | 767 | 1,238 | 1,587
Tax (Expense) Benefit |  |  |  |
Net unrealized gains/losses / Other comprehensive income (loss) | (138) | (188) | (303) | (389)
Net of Tax |  |  |  |
Other comprehensive (loss) income | $ 429 | $ 579 | $ 935 | $ 1,198

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