Loans and Asset Quality Information (Schedule of Information of Loans Modified in Troubled Debt Restructuring) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) contract	Sep. 30, 2019 USD ($) contract	Sep. 30, 2020 USD ($) contract	Sep. 30, 2019 USD ($) contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	1	1	6	6
Pre- Modification Restructured Balances	$ 2,344	$ 133	$ 2,629	$ 1,631
Post- Modification Restructured Balances	$ 2,344	$ 133	$ 2,632	$ 1,635
Commercial, financial, and agricultural | TDRs – Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	0	2	1
Pre- Modification Restructured Balances	$ 0	$ 0	$ 143	$ 143
Post- Modification Restructured Balances	$ 0	$ 0	$ 143	$ 143
Commercial, financial, and agricultural | TDRs – Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	0	0	0
Pre- Modification Restructured Balances	$ 0	$ 0	$ 0	$ 0
Post- Modification Restructured Balances	$ 0	$ 0	$ 0	$ 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	1	0
Pre- Modification Restructured Balances	$ 0	$ 0	$ 67	$ 0
Post- Modification Restructured Balances	$ 0	$ 0	$ 67	$ 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	0	0
Pre- Modification Restructured Balances	$ 0	$ 0	$ 0	$ 0
Post- Modification Restructured Balances	$ 0	$ 0	$ 0	$ 0
Real estate, commercial | Real estate – mortgage – commercial and other | TDRs – Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	0	0	1
Pre- Modification Restructured Balances	$ 0	$ 0	$ 0	$ 965
Post- Modification Restructured Balances	$ 0	$ 0	$ 0	$ 965
Real estate, commercial | Real estate – mortgage – commercial and other | TDRs – Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	1	0	1	0
Pre- Modification Restructured Balances	$ 2,344	$ 0	$ 2,344	$ 0
Post- Modification Restructured Balances	$ 2,344	$ 0	$ 2,344	$ 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	1	2	4
Pre- Modification Restructured Balances	$ 0	$ 133	$ 75	$ 523
Post- Modification Restructured Balances	$ 0	$ 133	$ 78	$ 527
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	0	0
Pre- Modification Restructured Balances	$ 0	$ 0	$ 0	$ 0
Post- Modification Restructured Balances	$ 0	$ 0	$ 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	0	0
Pre- Modification Restructured Balances	$ 0	$ 0	$ 0	$ 0
Post- Modification Restructured Balances	$ 0	$ 0	$ 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	0	0
Pre- Modification Restructured Balances	$ 0	$ 0	$ 0	$ 0
Post- Modification Restructured Balances	$ 0	$ 0	$ 0	$ 0
Consumer loans | TDRs – Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	0	0	0
Pre- Modification Restructured Balances	$ 0	$ 0	$ 0	$ 0
Post- Modification Restructured Balances	$ 0	$ 0	$ 0	$ 0
Consumer loans | TDRs – Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	0	0	0
Pre- Modification Restructured Balances	$ 0	$ 0	$ 0	$ 0
Post- Modification Restructured Balances	$ 0	$ 0	$ 0	$ 0