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Allowance for Loan 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 | Jun. 30, 2023 | Dec. 31, 2022
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Financing Receivable Recorded Investment [Line Items] |  |
Loans individually evaluated for expected credit losses |  | $ 624
Loans individually evaluated allowance for credit losses |  | 7
Real Estate Loan [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans individually evaluated for expected credit losses | $ 659 |
Other Loan [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans individually evaluated for expected credit losses | 1,063 |
Amortized Cost Basis Of Collateral Dependent Loans [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans individually evaluated allowance for credit losses | 523 |
Commercial and Agriculture [Member] | Real Estate Loan [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans individually evaluated for expected credit losses | 49 |
Commercial and Agriculture [Member] | Other Loan [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans individually evaluated for expected credit losses | 632 |
Commercial and Agriculture [Member] | Amortized Cost Basis Of Collateral Dependent Loans [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans individually evaluated allowance for credit losses | 307 |
Commercial Real Estate Owner Occupied [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans individually evaluated for expected credit losses |  | 232
Loans individually evaluated allowance for credit losses |  | 6
Residential Real Estate [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans individually evaluated for expected credit losses |  | 392
Loans individually evaluated allowance for credit losses |  | $ 1
Residential Real Estate [Member] | Real Estate Loan [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans individually evaluated for expected credit losses | 610 |
Lease Financing Receivable [Member] | Other Loan [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans individually evaluated for expected credit losses | 431 |
Lease Financing Receivable [Member] | Amortized Cost Basis Of Collateral Dependent Loans [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans individually evaluated allowance for credit losses | $ 216 |

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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (g) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B + Details
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- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11C -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11C Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L(5)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480418/310-10-S99-4 + Details
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