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Commitments and Contingencies - Summary of Bank's Commitments and Contingent Liabilities (Detail) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
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Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Commitments to extend credit |  |
Real estate construction loans |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Commitments to extend credit | 233,251 | 272,308
Real estate mortgage loans |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Commitments to extend credit | 428,338 | 419,172
Standby letters of credit |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Commitments to extend credit | 32,512 | 39,804
Commercial loans |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Commitments to extend credit | 846,628 | 788,491
Consumer loans |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Commitments to extend credit | 626,521 | 627,681
Deposit account overdraft privilege |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Commitments to extend credit | $ 128,101 | $ 121,006

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