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Allowance for Credit Losses - Ending Allocation of Allowance for Loan Losses and Loan Balances Outstanding (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses, Total			$ 28,511
Total loans	$ 3,081,230	$ 2,861,727
Commercial and Agriculture [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses, Total			3,011
Total loans	328,488	304,793
Commercial Real Estate Owner Occupied [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses, Total			4,565
Total loans	374,367	377,321
Commercial Real Estate Non Owner Occupied [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses, Total			14,138
Total loans	1,225,991	1,161,894
Residential Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses, Total			3,145
Total loans	763,869	659,841
Real Estate Construction [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses, Total			2,293
Total loans	305,992	260,409
Farm Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses, Total			291
Total loans	23,035	24,771
Lease Financing Receivable [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	46,900	54,642
Consumer and Other [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses, Total			98
Total loans	$ 12,588	$ 18,056
Unallocated [Member]
Accounts Notes And Loans Receivable [Line Items]
Allowance for loan losses, Total			$ 541

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