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Loans, Allowance for Credit Losses, and Asset Quality Information (Schedule of Information of Loans Modified in Troubled Debt Restructuring) (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2021
USD ($)
contract
Mar. 31, 2020
USD ($)
contract
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Contracts | contract 2 2
Pre- Modification Restructured Balances $ 271 $ 143
Post- Modification Restructured Balances $ 268 $ 143
Commercial, financial, and agricultural | TDRs – Accruing    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Contracts | contract 0 2
Pre- Modification Restructured Balances $ 0 $ 143
Post- Modification Restructured Balances $ 0 $ 143
Commercial, financial, and agricultural | TDRs – Nonaccrual    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Contracts | contract 1 0
Pre- Modification Restructured Balances $ 111 $ 0
Post- Modification Restructured Balances $ 108 $ 0
Real estate, commercial | Real estate – construction, land development & other land loans | TDRs – Accruing    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Contracts | contract 0 0
Pre- Modification Restructured Balances $ 0 $ 0
Post- Modification Restructured Balances $ 0 $ 0
Real estate, commercial | Real estate – construction, land development & other land loans | TDRs – Nonaccrual    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Contracts | contract 0 0
Pre- Modification Restructured Balances $ 0 $ 0
Post- Modification Restructured Balances $ 0 $ 0
Real estate, commercial | Real estate – mortgage – commercial and other | TDRs – Accruing    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Contracts | contract 1 0
Pre- Modification Restructured Balances $ 160 $ 0
Post- Modification Restructured Balances $ 160 $ 0
Real estate, commercial | Real estate – mortgage – commercial and other | TDRs – Nonaccrual    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Contracts | contract 0 0
Pre- Modification Restructured Balances $ 0 $ 0
Post- Modification Restructured Balances $ 0 $ 0
Real estate, mortgage | Real estate – mortgage – residential (1-4 family) first mortgages | TDRs – Accruing    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Contracts | contract 0 0
Pre- Modification Restructured Balances $ 0 $ 0
Post- Modification Restructured Balances $ 0 $ 0
Real estate, mortgage | Real estate – mortgage – residential (1-4 family) first mortgages | TDRs – Nonaccrual    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Contracts | contract 0 0
Pre- Modification Restructured Balances $ 0 $ 0
Post- Modification Restructured Balances $ 0 $ 0
Real estate, mortgage | Real estate – mortgage – home equity loans / lines of credit | TDRs – Accruing    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Contracts | contract 0 0
Pre- Modification Restructured Balances $ 0 $ 0
Post- Modification Restructured Balances $ 0 $ 0
Real estate, mortgage | Real estate – mortgage – home equity loans / lines of credit | TDRs – Nonaccrual    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Contracts | contract 0 0
Pre- Modification Restructured Balances $ 0 $ 0
Post- Modification Restructured Balances $ 0 $ 0
Consumer loans | TDRs – Accruing    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Contracts | contract 0 0
Pre- Modification Restructured Balances $ 0 $ 0
Post- Modification Restructured Balances $ 0 $ 0
Consumer loans | TDRs – Nonaccrual    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Contracts | contract 0 0
Pre- Modification Restructured Balances $ 0 $ 0
Post- Modification Restructured Balances $ 0 $ 0