Allowance for Credit Losses - Summary by Class of Loans, Carrying Value of Collateral Dependent Nonaccrual Loans and Type of Collateral (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	$ 24,143	$ 16,679
Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	18,160	16,547
Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	5,983	132
Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Agriculture and Farmland [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	818	0
Agriculture and Farmland [Member] | Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	818	0
Agriculture and Farmland [Member] | Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Agriculture and Farmland [Member] | Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Construction [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	497	9
Construction [Member] | Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	497	9
Construction [Member] | Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Construction [Member] | Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Commercial and Industrial [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	5,983	132
Commercial and Industrial [Member] | Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Commercial and Industrial [Member] | Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	5,983	132
Commercial and Industrial [Member] | Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Multifamily [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	502	0
Multifamily [Member] | Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	502	0
Multifamily [Member] | Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Multifamily [Member] | Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Owner Occupied [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	5,632	9,752
Owner Occupied [Member] | Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	5,632	9,752
Owner Occupied [Member] | Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Owner Occupied [Member] | Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Non-owner Occupied [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	330	4,329
Non-owner Occupied [Member] | Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	330	4,329
Non-owner Occupied [Member] | Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Non-owner Occupied [Member] | Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
First Liens [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	9,920	1,975
First Liens [Member] | Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	9,920	1,975
First Liens [Member] | Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
First Liens [Member] | Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Second Liens and Lines of Credit [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	461	482
Second Liens and Lines of Credit [Member] | Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	461	482
Second Liens and Lines of Credit [Member] | Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Second Liens and Lines of Credit [Member] | Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Municipal [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Municipal [Member] | Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Municipal [Member] | Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Municipal [Member] | Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Consumer [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Consumer [Member] | Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Consumer [Member] | Business Assets [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	0	0
Consumer [Member] | Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual	$ 0	$ 0