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, 2024	Dec. 31, 2023
Real Estate Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans individually evaluated for expected credit losses	$ 1,349	$ 1,624
Other Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans individually evaluated for expected credit losses	9,353	4,735
Amortized Cost Basis Of Collateral Dependent Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans individually evaluated allowance for credit losses	2,658	1,265
Commercial and Agriculture [Member] | Other Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans individually evaluated for expected credit losses	3,899	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	982	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		308
Commercial Real Estate Owner Occupied [Member] | Other Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans individually evaluated for expected credit losses	299
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	32	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		1,167
Commercial Real Estate Non Owner Occupied [Member] | Other Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans individually evaluated for expected credit losses	3,013
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	1,349	149
Lease Financing Receivable [Member] | Other Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans individually evaluated for expected credit losses	2,142	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	$ 585	$ 15