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Other Comprehensive Income - Summary of Components of OCI (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Equity [Abstract]        
Net change in fair value recorded in accumulated OCI, Before-tax $ (2,292) $ (37,996) $ (38,148) $ 2,428
Net change in fair value recorded in accumulated OCI, Tax effect 678 11,233 11,278 (718)
Net change in fair value recorded in accumulated OCI, After-tax (1,614) (26,763) (26,870) 1,710
Amortization of net unrealized losses on securities transferred from available-for-sale to held-to-maturity, Before-tax 175 3,532 337 3,810
Amortization of net unrealized losses on securities transferred from available-for-sale to held-to-maturity, Tax effect (52) (3,364) (100) (3,446)
Amortization of net unrealized losses on securities transferred from available-for-sale to held-to-maturity, After-tax 123 168 237 364
Net change in fair value recorded in accumulated OCI (Derivatives designated as hedging instruments, Fair value hedges) Before - Tax 2,835 11,129 20,667 11,129
Net change in fair value recorded in accumulated OCI (Derivatives designated as hedging instruments, Fair value hedges) Tax effect (947) (3,283) (5,909) (3,283)
Net change in fair value recorded in accumulated OCI (Derivatives designated as hedging instruments, Fair value hedges) After Tax 1,888 7,846 14,758 7,846
Net change in fair value recorded in accumulated OCI (Derivatives designated as hedging instruments, Cash flow hedges) Before - Tax 795 0 1,584 0
Net change in fair value recorded in accumulated OCI (Derivatives designated as hedging instruments, Cash flow hedges) Tax Effect (235) 0 (468) 0
Net change in fair value recorded in accumulated OCI (Derivatives designated as hedging instruments, Cash flow hedges) After - Tax 560 0 1,116 0
Net change, Before-tax 1,513 (23,335) (15,560) 17,367
Net change, Tax effect (556) 4,586 4,801 (7,447)
Net change, After-tax $ 957 $ (18,749) $ (10,759) $ 9,920