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Loans and ACL - Additional Information (Detail) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($) | Jun. 30, 2024 USD ($) Loan | Jun. 30, 2023 USD ($) | Dec. 31, 2023 USD ($)
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Interest income from nonaccrual loans | $ 122 | $ 0 | $ 187 | $ 89 |
Current period net charge-offs | 12,610 | 9,020 | 15,312 | 10,329 |
Accrued interest excluded from ACL | 12,500 |  | 12,500 |  | $ 13,200
Loans pledged | 2,258,443 |  | 2,258,443 |  | 2,430,117
Carrying value after charge off | 14,400 |  | 14,400 |  |
Recorded investment of PCD Loans |  |  | 49,000 |  | 51,000
Recorded investment, estimated allowance for credit loss |  |  | 486 |  | 529
Recorded investment, PCD Discount (Premium) |  |  | 3,200 |  | 3,800
Mortgage loans with amortized cost |  |  | $ 710 |  |
Number of residential mortgage loans in the process of foreclosure | Loan |  |  | 5 |  |
Default on payments for loans modified |  |  | $ 0 |  |
Cash payments received |  |  | 9,000 |  |
Loans Held For Sale [Member] | Commercial Loan [Member] |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Current period net charge-offs | 9,400 |  |  |  |
Commercial and Residential Mortgages [Member] | Asset Pledged as Collateral without Right [Member] | Federal Home Loan Bank Advances [Member] |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loans pledged | 829,200 |  | 829,200 |  | 767,100
Commercial and Industrial [Member] |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Current period net charge-offs | 11,982 | $ 7,326 | 13,939 | $ 8,125 |
Loans pledged | 401,589 |  | 401,589 |  | 508,944
Commercial and Industrial [Member] | Asset Pledged as Collateral without Right [Member] | Federal Reserve Bank Borrowings [Member] |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loans pledged | $ 81,200 |  | $ 81,200 |  | $ 161,000

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