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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Before and After Tax Amounts by Component (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Change in unrealized gain (loss) on securities: |  |  |
Change in net unrealized gain (loss) during the period | $ 23,218 | $ 10,355 | $ (138,630)
Reclassification adjustment for net losses included in net loss on sale of securities and other assets | 42,810 | 1,447 |
Accretion of net unrealized loss on securities transferred to held-to-maturity | 3,028 | 3,142 | 2,953
Net change | 69,056 | 14,944 | (135,677)
Tax expense (benefit) | 22,581 | 4,316 | (42,671)
Net change in unrealized gain (loss) on securities, net of reclassification adjustments and tax | 46,475 | 10,628 | (93,006)
Change in pension and other postretirement obligations: |  |  |
Reclassification adjustment for expense included in other expense | 26 | (1,547) | (3,715)
Change in the net actuarial gain | (1,426) | (190) | (2,062)
Net change | (1,400) | (1,737) | (5,777)
Tax benefit | (331) | (573) | (1,817)
Net change in pension and other postretirement obligations | (1,069) | (1,164) | (3,960)
Change in unrealized gain (loss) on derivatives: |  |  |
Change in net unrealized (loss) gain during the period | (8,453) | (11,782) | 14,412
Reclassification adjustment for expense included in interest expense | 10,008 | 2,092 | (1,621)
Net change | 1,555 | (9,690) | 12,791
Tax expense (benefit) | 400 | (3,026) | 4,023
Net change in unrealized gain (loss) on derivatives, net of reclassification adjustments and tax | 1,155 | (6,664) | 8,768
Total other comprehensive income (loss), net of tax | $ 46,561 | $ 2,800 | $ (88,198)

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