Loans and Leases - Nonperforming Loans and Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Nonperforming Loans And Leases [Line Items]
Nonaccrual loans and lease	$ 11,362	$ 13,353
Loans and lease 90 days or more past due and accruing interest	1,996	875
Total nonperforming loans and leases	13,358	14,228
Commercial Financial And Agricultural [Member]
Nonperforming Loans And Leases [Line Items]
Nonaccrual loans and lease	3,423	5,072
Loans and lease 90 days or more past due and accruing interest	0	0
Total nonperforming loans and leases	3,423	5,072
Real-Estate Commercial [Member]
Nonperforming Loans And Leases [Line Items]
Nonaccrual loans and lease	4,288	4,537
Loans and lease 90 days or more past due and accruing interest	1,195	20
Total nonperforming loans and leases	5,483	4,557
Real-Estate Construction [Member]
Nonperforming Loans And Leases [Line Items]
Nonaccrual loans and lease	383	0
Loans and lease 90 days or more past due and accruing interest	0	0
Total nonperforming loans and leases	383	0
Real Estate Residential Secured For Business Purpose [Member]
Nonperforming Loans And Leases [Line Items]
Nonaccrual loans and lease	759	1,013
Loans and lease 90 days or more past due and accruing interest	0	263
Total nonperforming loans and leases	759	1,276
Real Estate-Residential Secured For Personal Purpose [Member]
Nonperforming Loans And Leases [Line Items]
Nonaccrual loans and lease	1,500	1,989
Loans and lease 90 days or more past due and accruing interest	0	319
Total nonperforming loans and leases	1,500	2,308
Real Estate Home Equity Secured For Personal Purpose [Member]
Nonperforming Loans And Leases [Line Items]
Nonaccrual loans and lease	948	740
Loans and lease 90 days or more past due and accruing interest	0	0
Total nonperforming loans and leases	948	740
Loans to Individuals [Member]
Nonperforming Loans And Leases [Line Items]
Nonaccrual loans and lease	0	0
Loans and lease 90 days or more past due and accruing interest	47	39
Total nonperforming loans and leases	47	39
Lease Financings [Member]
Nonperforming Loans And Leases [Line Items]
Nonaccrual loans and lease	61	2
Loans and lease 90 days or more past due and accruing interest	754	234
Total nonperforming loans and leases	$ 815	$ 236