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Loans and ACL - Summary of Modified Loans (Parenthetical) (Detail) - USD ($) $ in Thousands | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2024 | Jun. 30, 2023 | Dec. 31, 2023 | Mar. 31, 2023 | Dec. 31, 2022
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Recorded Investment | $ 35,009 |  |  |  |  |
Allowance for loan losses | 35,025 |  | $ 35,893 | [1] | $ 35,961 | $ 30,740
Cash payments received | 1,500 |  |  |  |  |
Collateral Pledged |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Allowance for loan losses | 9,600 |  |  |  |  |
Commercial and Industrial [Member] |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Recorded Investment | 34,162 |  |  |  |  |
Allowance for loan losses | 27,065 |  | $ 27,491 |  | $ 27,266 | $ 27,070
Term extension and Forbearance [Member] | Commercial and Industrial [Member] |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Recorded Investment | $ 33,979 | $ 29,800 |  |  |  |
[1] | Derived from audited December 31, 2023 Consolidated Financial Statements.

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