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Loans and Allowance for Credit Losses - Additional Information (Detail) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) Contract | Dec. 31, 2021 USD ($) Contract | Dec. 31, 2020 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Non Accrual Status Of Loans After Number Of Days Past Due | 90 days |  |  |
Loans Receivable Held-for-sale, Amount | $ 29,820 | $ 11,869 |  |
Provision for credit losses | 17,759 | 17,521 | $ (377) |
Charge-offs | (33,267) | (9,845) | $ (13,058) |
Recorded Investment | $ 39,472 | $ 35,487 |  |
Number of loans modified | Contract |  | 5 | 30 |
Total amount of loan modified |  | $ 676 | $ 1,690 |
Total gains or losses included in earnings |  | 0 |  |
Loans with modification to rate and payment due to amortization |  | 10 | 400 |
Minimum days required for conversion of trouble debt to be in default | 90 days |  |  |
Unearned Deferred (Fees) Costs on Loans | $ 8,200 | 5,900 |  |
Unearned Premiums | (25,700) | (5,400) |  |
Loans | 8,968,761 | 7,642,143 |  |
Loans and Leases Receivable, Gross | $ 8,968,761 | 7,642,143 |  |
Forecasted Value, National Unemployment, Percent | 3.79% |  |  |
Financing Receivable, Allowance for Credit Loss | $ 117,718 | 102,906 | 92,522 | $ 101,309
Weighted Average [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Forecasted Value, National Unemployment, Percent | 4.55% |  |  |
Maximum [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Forecasted Value, National Unemployment, Percent | 4.82% |  |  |
Impaired Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Unfunded commitments related to nonperforming loans | $ 100 | 200 |  |
Loans To Individuals [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Non Accrual Status Of Loans After Number Of Days Past Due | 150 days |  |  |
Nonaccrual Commercial Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans Receivable Held-for-sale, Amount | $ 0 | 0 |  |
Gain (loss) on sale of impaired loans | 0 | 0 | $ 400 |
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Impaired Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Off-Balance-Sheet, Credit Loss, Liability | 0 | 0 |  |
Commercial Loan [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 1,543,349 | 1,211,706 |  |
Loans and Leases Receivable, Gross | 1,543,349 | 1,211,706 |  |
Commercial Loan [Member] | Payroll Protection Program Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 200 | $ 4,300 |  |
Financing Receivable, Allowance for Credit Loss | $ 0 |  |  |

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