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Allowance for Credit Losses - Schedule of Amortized Cost Basis of Collateral Dependent Loans Individually Evaluated Expected Credit Losses and Related Allowance for Credit Losses (Detail) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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Real Estate Loan [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans individually evaluated for expected credit losses | $ 13,058 | $ 1,624
Other Loan [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans individually evaluated for expected credit losses | 5,195 | 4,735
Amortized Cost Basis Of Collateral Dependent Loans [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans individually evaluated allowance for credit losses | 2,980 | 1,265
Commercial and Agriculture [Member] | Other Loan [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans individually evaluated for expected credit losses | 4,530 | 4,674
Commercial and Agriculture [Member] | Amortized Cost Basis Of Collateral Dependent Loans [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans individually evaluated allowance for credit losses | 1,756 | 945
Commercial Real Estate Owner Occupied [Member] | Real Estate Loan [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans individually evaluated for expected credit losses | 8,000 | 308
Commercial Real Estate Owner Occupied [Member] | Amortized Cost Basis Of Collateral Dependent Loans [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans individually evaluated allowance for credit losses | 0 | 37
Commercial Real Estate Non Owner Occupied [Member] | Real Estate Loan [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans individually evaluated for expected credit losses | 3,013 | 1,167
Commercial Real Estate Non Owner Occupied [Member] | Amortized Cost Basis Of Collateral Dependent Loans [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans individually evaluated allowance for credit losses | 1,059 | 268
Residential Real Estate [Member] | Real Estate Loan [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans individually evaluated for expected credit losses | 2,045 | 149
Lease Financing Receivable [Member] | Other Loan [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans individually evaluated for expected credit losses | 665 | 61
Lease Financing Receivable [Member] | Amortized Cost Basis Of Collateral Dependent Loans [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans individually evaluated allowance for credit losses | $ 165 | $ 15

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