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Allowance for Credit Losses - Changes in the Allowance for Credit Losses (Parenthetical) (Detail) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023 | Jan. 01, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Reserve for credit losses |  |  |  | $ 28,511 |
Allowance for credit losses | $ 39,669 | $ 37,160 |  | 28,511 | $ 26,641
ASU 2016-13 [Member] |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Reserve for credit losses |  |  | $ 37,861 |  |
Allowance for credit losses |  |  |  | $ 897 |
ASU 2016-13 [Member] | PCD Loans [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Reserve for credit losses |  |  | 1,668 |  |
Allowance for credit losses |  | 1,668 | $ 1,668 |  |
Loans and leases receivable allowance net of change in estimates |  | $ 771 |  |  |

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