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Other Comprehensive Income (Loss) - Summary of Components of OCI (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Net change in fair value recorded in accumulated OCI, Before-tax | $ (26,274) | $ 50,331 | $ (498,759)
Net change in fair value recorded in accumulated OCI, Tax effect | 7,768 | (14,880) | 147,451
Net realized loss on investment securities reclassified into earnings Before-tax | 28,317 | 0 | 0
Net change in fair value recorded in accumulated OCI, After-tax | (18,506) | 35,451 | (351,308)
Net realized loss on investment securities reclassified into earnings Tax effect | (8,372) | (0) | (0)
Amortization of unrealized losses on securities transferred from available-for-sale to held-to-maturity, Before-tax | 685 | 914 | 681
Net realized loss on investment securities reclassified into earnings After-tax | 19,945 | 0 | 0
Amortization of unrealized losses on securities transferred from available-for-sale to held-to-maturity, Tax effect | (203) | (270) | (201)
Amortization of unrealized losses on securities transferred from available-for-sale to held-to-maturity, After-tax | 482 | 644 | 480
Net change, Before-tax | 16,371 | 44,306 | (498,078)
Net change, Tax effect | (4,866) | (13,079) | 147,250
Net change After-tax | 11,505 | 31,227 | (350,828)
Fair Value Hedging [Member] |  |  |
Net change in fair value recorded in accumulated OCI (Derivatives designated as hedging instruments, Fair value hedges) Before - Tax | 14,160 | (6,938) | 0
Net change in fair value recorded in accumulated OCI (Derivatives designated as hedging instruments, Fair value hedges) Tax effect | (4,212) | 2,070 | 0
Net change in fair value recorded in accumulated OCI (Derivatives designated as hedging instruments, Fair value hedges) After Tax | 9,948 | (4,868) | 0
Cash Flow Hedging [Member] |  |  |
Net change in fair value recorded in accumulated OCI (Derivatives designated as hedging instruments, Cash flow hedges) Before - Tax | (517) | 0 | 0
Net change in fair value recorded in accumulated OCI (Derivatives designated as hedging instruments, Cash flow hedges) Tax Effect | 153 | 0 | 0
Net change in fair value recorded in accumulated OCI (Derivatives designated as hedging instruments, Cash flow hedges) After - Tax | $ (364) | $ 0 | $ 0

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