v3.26.1
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
Mar. 31, 2026
Dec. 31, 2025
Real Estate Loan [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans individually evaluated for expected credit losses $ 12,246 $ 13,701
Other Loan [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans individually evaluated for expected credit losses 2,653 2,806
Amortized Cost Basis Of Collateral Dependent Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans individually evaluated allowance for credit losses 3,259 3,367
Commercial and Agriculture [Member] | Other Loan [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans individually evaluated for expected credit losses 2,653 2,687
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 259 248
Commercial Real Estate Owner Occupied [Member] | Real Estate Loan [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans individually evaluated for expected credit losses 1,440 2,778
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
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 8,496 9,010
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 3,000 3,000
Residential Real Estate [Member] | Real Estate Loan [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans individually evaluated for expected credit losses 1,945 1,536
Farm Real Estate [Member] | Real Estate Loan [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans individually evaluated for expected credit losses $ 365 377
Lease Financing Receivable [Member] | Other Loan [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans individually evaluated for expected credit losses   119
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   $ 119