Allowance for Credit Losses - Summary by Class of Loans, Carrying Value of Collateral Dependent Nonaccrual Loans and Type of Collateral (Detail) $ in Thousands	Dec. 31, 2023 USD ($)
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	$ 7,037
Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	6,969
Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	61
Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	7
Agriculture and Farmland [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Agriculture and Farmland [Member] | Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Agriculture and Farmland [Member] | Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Agriculture and Farmland [Member] | Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Construction [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	191
Construction [Member] | Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	191
Construction [Member] | Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Construction [Member] | Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Commercial and Industrial [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	61
Commercial and Industrial [Member] | Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Commercial and Industrial [Member] | Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	61
Commercial and Industrial [Member] | Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Multifamily [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Multifamily [Member] | Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Multifamily [Member] | Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Multifamily [Member] | Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Owner Occupied [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	2,548
Owner Occupied [Member] | Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	2,548
Owner Occupied [Member] | Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Owner Occupied [Member] | Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Non-owner Occupied [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	1,229
Non-owner Occupied [Member] | Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	1,229
Non-owner Occupied [Member] | Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Non-owner Occupied [Member] | Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
First Liens [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	2,707
First Liens [Member] | Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	2,707
First Liens [Member] | Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
First Liens [Member] | Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Second Liens and Lines of Credit [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	294
Second Liens and Lines of Credit [Member] | Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	294
Second Liens and Lines of Credit [Member] | Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Second Liens and Lines of Credit [Member] | Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Municipal [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Municipal [Member] | Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Municipal [Member] | Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Municipal [Member] | Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Consumer [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	7
Consumer [Member] | Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Consumer [Member] | Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0
Consumer [Member] | Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	$ 7