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v3.25.3

Loans and ACL - Additional Information (Detail) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) Loan | Sep. 30, 2024 USD ($) | Dec. 31, 2024 USD ($)
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Interest income from nonaccrual loans | $ 289,000 | $ 275,000 | $ 437,000 | $ 463,000 |
Accrued interest excluded from ACL | 9,000,000 |  | 9,000,000 |  | $ 10,700,000
Loans pledged | 1,911,528,000 |  | 1,911,528,000 |  | 2,110,755,000
Recorded investment of PCD Loans |  |  | 30,000,000 |  | 43,800,000
Recorded investment, estimated allowance for credit loss |  |  | 200,000 |  | 300,000
Recorded investment, PCD Discount (Premium) |  |  | 2,200,000 |  | 3,000,000
Granted TLM | 523,000 | 1,555,000 | $ 2,602,000 | 1,973,000 |
Number of residential mortgage loans in the process of foreclosure | Loan |  |  | 6 |  |
Mortgage loans with total amortized cost |  |  | $ 2,700,000 |  |
Unfunded commitments | 0 |  | 0 |  | 0
Extension and Principal Forbearance [Member] |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Granted TLM | 0 | 229,000 | 0 | 229,000 |
Extended Maturity [Member] |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Granted TLM | 523,000 | 632,000 | 2,463,000 | 670,000 |
Commercial and Residential Mortgages Loans [Member] | Asset Pledged as Collateral without Right [Member] | Federal Home Loan Bank Advances [Member] |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loans pledged | 736,000,000 |  | 736,000,000 |  | 797,700,000
Commercial and Industrial [Member] |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loans pledged | 276,609,000 |  | 276,609,000 |  | 354,904,000
Commercial and Industrial [Member] | Extension and Principal Forbearance [Member] |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Granted TLM | 0 | 229,000 | 0 | 229,000 |
Commercial and Industrial [Member] | Extended Maturity [Member] |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Granted TLM | 0 | $ 560,000 | 1,940,000 | $ 560,000 |
Commercial and Industrial [Member] | Asset Pledged as Collateral without Right [Member] | FRB [Member] |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loans pledged | $ 75,400,000 |  | $ 75,400,000 |  | $ 91,600,000

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