Loans and Asset Quality Information (Schedule of Information of Loans Modified in Troubled Debt Restructuring) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($) contract	Jun. 30, 2019 USD ($) contract	Jun. 30, 2020 USD ($) contract	Jun. 30, 2019 USD ($) contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	3	3	5	5
Pre- Modification Restructured Balances	$ 142	$ 1,244	$ 285	$ 1,498
Post- Modification Restructured Balances	$ 145	$ 1,244	$ 288	$ 1,502
Commercial, financial, and agricultural | TDRs – Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	1	2	1
Pre- Modification Restructured Balances	$ 0	$ 143	$ 143	$ 143
Post- Modification Restructured Balances	$ 0	$ 143	$ 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	1	0	1	0
Pre- Modification Restructured Balances	$ 67	$ 0	$ 67	$ 0
Post- Modification Restructured Balances	$ 67	$ 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	1	0	1
Pre- Modification Restructured Balances	$ 0	$ 965	$ 0	$ 965
Post- Modification Restructured Balances	$ 0	$ 965	$ 0	$ 965
Real estate, commercial | Real estate – mortgage – commercial and other | 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 – residential (1-4 family) first mortgages | TDRs – Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	2	1	2	3
Pre- Modification Restructured Balances	$ 75	$ 136	$ 75	$ 390
Post- Modification Restructured Balances	$ 78	$ 136	$ 78	$ 394
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