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Loans and ACL - Summary of Aging Analysis of Amortized Cost of TLMs (Detail) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | $ 10,997 | $ 8,930
Commercial and Industrial [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 5,247 | 3,299
Residential [Member] | Real Estate Loan [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 826 | 694
Residential Construction [Member] | Real Estate Loan [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 154 | 155
Commercial [Member] | Real Estate Loan [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 4,761 | 4,772
Consumer loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 9 | 10
Current Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 2,844 | 2,676
Current Loans [Member] | Commercial and Industrial [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 734 | 554
Current Loans [Member] | Residential [Member] | Real Estate Loan [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 192 | 194
Current Loans [Member] | Residential Construction [Member] | Real Estate Loan [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 154 | 155
Current Loans [Member] | Commercial [Member] | Real Estate Loan [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 1,764 | 1,773
Current Loans [Member] | Consumer loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 0 | 0
30-89 Days Past Due [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 141 | 0
30-89 Days Past Due [Member] | Commercial and Industrial [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 0 | 0
30-89 Days Past Due [Member] | Residential [Member] | Real Estate Loan [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 141 | 0
30-89 Days Past Due [Member] | Residential Construction [Member] | Real Estate Loan [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 0 | 0
30-89 Days Past Due [Member] | Commercial [Member] | Real Estate Loan [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 0 | 0
30-89 Days Past Due [Member] | Consumer loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 0 | 0
Greater than 90 Days Past Due & Accruing [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 0 | 0
Greater than 90 Days Past Due & Accruing [Member] | Commercial and Industrial [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 0 | 0
Greater than 90 Days Past Due & Accruing [Member] | Residential [Member] | Real Estate Loan [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 0 | 0
Greater than 90 Days Past Due & Accruing [Member] | Residential Construction [Member] | Real Estate Loan [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 0 | 0
Greater than 90 Days Past Due & Accruing [Member] | Commercial [Member] | Real Estate Loan [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 0 | 0
Greater than 90 Days Past Due & Accruing [Member] | Consumer loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 0 | 0
Non Accrual [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 8,012 | 6,254
Non Accrual [Member] | Commercial and Industrial [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 4,513 | 2,745
Non Accrual [Member] | Residential [Member] | Real Estate Loan [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 493 | 500
Non Accrual [Member] | Residential Construction [Member] | Real Estate Loan [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 0 | 0
Non Accrual [Member] | Commercial [Member] | Real Estate Loan [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | 2,997 | 2,999
Non Accrual [Member] | Consumer loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Modified in Period, Amount | $ 9 | $ 10

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