Credit Quality - Schedule of Amortized Cost Loans and Leases Pledged As Collateral (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Amortized Cost Collateral Dependent Loans [Line Items]
Amortized Cost Loans and Leases Pledged As Collateral	$ 58,726	$ 130,460
Commercial Real Estate [Member] | Owner-Occupied [Member]
Amortized Cost Collateral Dependent Loans [Line Items]
Amortized Cost Loans and Leases Pledged As Collateral	17,086	21,036
Commercial Real Estate [Member] | Nonowner-Occupied [Member]
Amortized Cost Collateral Dependent Loans [Line Items]
Amortized Cost Loans and Leases Pledged As Collateral	14,156	68,752
Other Commercial [Member]
Amortized Cost Collateral Dependent Loans [Line Items]
Amortized Cost Loans and Leases Pledged As Collateral	12,471	18,050
Residential Real Estate [Member]
Amortized Cost Collateral Dependent Loans [Line Items]
Amortized Cost Loans and Leases Pledged As Collateral	12,839	16,749
Construction & Land Development [Member]
Amortized Cost Collateral Dependent Loans [Line Items]
Amortized Cost Loans and Leases Pledged As Collateral	2,174	5,873
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	17,769	25,927
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	51	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	3,286	7,085
Residential Real Estate [Member] | Other Commercial [Member]
Amortized Cost Collateral Dependent Loans [Line Items]
Amortized Cost Loans and Leases Pledged As Collateral	1,593	2,093
Residential Real Estate [Member] | Residential Real Estate [Member]
Amortized Cost Collateral Dependent Loans [Line Items]
Amortized Cost Loans and Leases Pledged As Collateral	12,839	16,749
Residential Real Estate [Member] | Construction & Land Development [Member]
Amortized Cost Collateral Dependent Loans [Line Items]
Amortized Cost Loans and Leases Pledged As Collateral	0	0
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	9,733	15,263
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	28	38
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	9,705	15,225
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	1,419	5,473
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	0	703
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	0	0
Land [Member] | Construction & Land Development [Member]
Amortized Cost Collateral Dependent Loans [Line Items]
Amortized Cost Loans and Leases Pledged As Collateral	1,419	4,770
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	10,139	18,440
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	7,343	9,775
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	2,796	8,665
Commercial Real Estate [Member] | Other Commercial [Member]
Amortized Cost Collateral Dependent Loans [Line Items]
Amortized Cost Loans and Leases Pledged As Collateral	0	0
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 Assets [Member]
Amortized Cost Collateral Dependent Loans [Line Items]
Amortized Cost Loans and Leases Pledged As Collateral	19,666	65,357
Other Assets [Member] | Commercial Real Estate [Member] | Owner-Occupied [Member]
Amortized Cost Collateral Dependent Loans [Line Items]
Amortized Cost Loans and Leases Pledged As Collateral	9,664	11,223
Other Assets [Member] | Commercial Real Estate [Member] | Nonowner-Occupied [Member]
Amortized Cost Collateral Dependent Loans [Line Items]
Amortized Cost Loans and Leases Pledged As Collateral	8,074	52,299
Other Assets [Member] | Other Commercial [Member]
Amortized Cost Collateral Dependent Loans [Line Items]
Amortized Cost Loans and Leases Pledged As Collateral	1,173	732
Other Assets [Member] | Residential Real Estate [Member]
Amortized Cost Collateral Dependent Loans [Line Items]
Amortized Cost Loans and Leases Pledged As Collateral	0	0
Other Assets [Member] | Construction & Land Development [Member]
Amortized Cost Collateral Dependent Loans [Line Items]
Amortized Cost Loans and Leases Pledged As Collateral	755	1,103
Other Assets [Member] | Consumer [Member] | Bankcard [Member]
Amortized Cost Collateral Dependent Loans [Line Items]
Amortized Cost Loans and Leases Pledged As Collateral	0	0
Other Assets [Member] | Consumer [Member] | Other Consumer [Member]
Amortized Cost Collateral Dependent Loans [Line Items]
Amortized Cost Loans and Leases Pledged As Collateral	$ 0	$ 0