Loans and Leases - Non-Performing Loans and Leases (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Non-Performing Loans and Leases [Line Items]
Nonaccrual loans and leases	$ 20,519	$ 13,353
Loans and leases 90 days or more past due and accruing interest	534	875
Financing Receivable, Nonaccrual Including Loans Held-for-Sale	20,527	13,353
Total Nonperforming Loans and Leases	21,061	14,228
Loans Held for Sale
Non-Performing Loans and Leases [Line Items]
Nonaccrual loans and leases	8
Total Nonperforming Loans and Leases	8
Commercial, Financial and Agricultural [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual loans and leases	2,266	5,072
Loans and leases 90 days or more past due and accruing interest	285	0
Total Nonperforming Loans and Leases	2,551	5,072
Real Estate-Commercial [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual loans and leases	5,709	4,537
Loans and leases 90 days or more past due and accruing interest	0	20
Total Nonperforming Loans and Leases	5,709	4,557
Real Estate-Construction [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual loans and leases	6,067	0
Loans and leases 90 days or more past due and accruing interest	0	0
Total Nonperforming Loans and Leases	6,067	0
Real Estate-Residential Secured for Business Purpose [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual loans and leases	1,090	1,013
Loans and leases 90 days or more past due and accruing interest	0	263
Total Nonperforming Loans and Leases	1,090	1,276
Real Estate-Residential Secured for Personal Purpose [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual loans and leases	4,213	1,989
Loans and leases 90 days or more past due and accruing interest	0	319
Total Nonperforming Loans and Leases	4,213	2,308
Real Estate-Home Equity Secured for Personal Purpose [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual loans and leases	1,116	740
Loans and leases 90 days or more past due and accruing interest	0	0
Total Nonperforming Loans and Leases	1,116	740
Loans to Individuals [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual loans and leases	0	0
Loans and leases 90 days or more past due and accruing interest	37	39
Total Nonperforming Loans and Leases	37	39
Lease Financings [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual loans and leases	58	2
Loans and leases 90 days or more past due and accruing interest	212	234
Total Nonperforming Loans and Leases	$ 270	$ 236