Loans, Allowance for Credit Losses, and Asset Quality Information - Accrued Interest Receivable Written Off (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest receivable written off	$ 324	$ 699
Commercial, financial, and agricultural
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest receivable written off	102	195
Real estate, commercial | Real estate – construction, land development & other land loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest receivable written off	16	6
Real estate, commercial | Real estate mortgage – commercial and other
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest receivable written off	139	453
Real estate, mortgage | Real estate mortgage – residential (1-4 family) first mortgages
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest receivable written off	45	31
Real estate, mortgage | Real estate mortgage – home equity loans/lines of credit
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest receivable written off	20	14
Consumer loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest receivable written off	$ 2	$ 0