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Other Comprehensive Income - Summary of Components of OCI (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Equity [Abstract]        
Net change in fair value recorded in accumulated OCI, Before-tax $ (37,996) $ (142,883) $ 2,428 $ (344,955)
Net change in fair value recorded in accumulated OCI, Tax effect 11,233 42,241 (718) 101,981
Net change in fair value recorded in accumulated OCI, After-tax (26,763) (100,642) 1,710 (242,974)
Amortization of unrealized losses on securities transferred from available-for-sale to held-to-maturity, Before-tax 3,532 93 3,810 147
Amortization of unrealized gains (losses) on securities transferred from available-for-sale to held-to-maturity, Tax effect (3,364) (28) (3,446) (44)
Amortization of unrealized losses on securities transferred from available-for-sale to held-to-maturity, After-tax 168 65 364 103
Net change in fair value recorded in accumulated OCI (Derivatives designated as hedging instruments) Before Tax 11,129 0 11,129 0
Net change in fair value recorded in accumulated OCI (Derivatives designated as hedging instruments) Tax Effect (3,283) 0 (3,283) 0
Net change in fair value recorded in accumulated OCI (Derivatives designated as hedging instruments) After Tax 7,846 0 7,846 0
Net change, Before-tax (23,335) (142,790) 17,367 (344,809)
Net change, Tax effect 4,586 42,213 (7,447) 101,938
Net change, After-tax $ (18,749) $ (100,577) $ 9,920 $ (242,871)