v3.26.3
Credit Quality - Schedule of Amortized Cost Loans and Leases Pledged As Collateral (Detail) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral $ 168,734 $ 173,232
Commercial Real Estate [Member] | Owner-Occupied [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 25,836 22,460
Commercial Real Estate [Member] | Nonowner-Occupied [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 119,140 130,377
Other Commercial [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 14,502 12,072
Residential Real Estate [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 5,519 6,054
Construction & Land Development [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 3,737 2,269
Consumer [Member] | Bankcard [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 0
Consumer [Member] | Other Consumer [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 0
Residential Real Estate [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 12,381 13,129
Residential Real Estate [Member] | Commercial Real Estate [Member] | Owner-Occupied [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 0
Residential Real Estate [Member] | Commercial Real Estate [Member] | Nonowner-Occupied [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 5,643 6,830
Residential Real Estate [Member] | Other Commercial [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 0
Residential Real Estate [Member] | Residential Real Estate [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 5,317 6,049
Residential Real Estate [Member] | Construction & Land Development [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 1,421 250
Residential Real Estate [Member] | Consumer [Member] | Bankcard [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 0
Residential Real Estate [Member] | Consumer [Member] | Other Consumer [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 0
Business Assets [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 6,928 4,005
Business Assets [Member] | Commercial Real Estate [Member] | Owner-Occupied [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 0
Business Assets [Member] | Commercial Real Estate [Member] | Nonowner-Occupied [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 0
Business Assets [Member] | Other Commercial [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 6,928 4,005
Business Assets [Member] | Residential Real Estate [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 0
Business Assets [Member] | Construction & Land Development [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 0
Business Assets [Member] | Consumer [Member] | Bankcard [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 0
Business Assets [Member] | Consumer [Member] | Other Consumer [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 0
Land [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 2,528 849
Land [Member] | Commercial Real Estate [Member] | Owner-Occupied [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 0
Land [Member] | Commercial Real Estate [Member] | Nonowner-Occupied [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 12 0
Land [Member] | Other Commercial [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 0
Land [Member] | Residential Real Estate [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 200 0
Land [Member] | Construction & Land Development [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 2,316 849
Land [Member] | Consumer [Member] | Bankcard [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 0
Land [Member] | Consumer [Member] | Other Consumer [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 0
Commercial Real Estate [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 92,715 92,773
Commercial Real Estate [Member] | Commercial Real Estate [Member] | Owner-Occupied [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 2,690 3,094
Commercial Real Estate [Member] | Commercial Real Estate [Member] | Nonowner-Occupied [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 85,230 84,786
Commercial Real Estate [Member] | Other Commercial [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 4,795 4,893
Commercial Real Estate [Member] | Residential Real Estate [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 0
Commercial Real Estate [Member] | Construction & Land Development [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 0
Commercial Real Estate [Member] | Consumer [Member] | Bankcard [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 0
Commercial Real Estate [Member] | Consumer [Member] | Other Consumer [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 0
Other Asset [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 54,182 62,476
Other Asset [Member] | Commercial Real Estate [Member] | Owner-Occupied [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 23,146 19,366
Other Asset [Member] | Commercial Real Estate [Member] | Nonowner-Occupied [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 28,255 38,761
Other Asset [Member] | Other Commercial [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 2,779 3,174
Other Asset [Member] | Residential Real Estate [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 2 5
Other Asset [Member] | Construction & Land Development [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 1,170
Other Asset [Member] | Consumer [Member] | Bankcard [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral 0 0
Other Asset [Member] | Consumer [Member] | Other Consumer [Member]    
Amortized Cost Collateral Dependent Loans [Line Items]    
Amortized Cost Loans and Leases Pledged As Collateral $ 0 $ 0