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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