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, 2019 USD ($) contract	Sep. 30, 2018 USD ($) contract	Sep. 30, 2019 USD ($) contract	Sep. 30, 2018 USD ($) contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	1	0	4	4
Pre- Modification Restructured Balances	$ 133	$ 0	$ 530	$ 333
Post- Modification Restructured Balances	$ 133	$ 0	$ 534	$ 343
Commercial, financial, and agricultural | TDRs – Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	0	1	0
Pre- Modification Restructured Balances	$ 0	$ 0	$ 143	$ 0
Post- Modification Restructured Balances	$ 0	$ 0	$ 143	$ 0
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	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 – Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	0	0	1
Pre- Modification Restructured Balances	$ 0	$ 0	$ 0	$ 61
Post- Modification Restructured Balances	$ 0	$ 0	$ 0	$ 61
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	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 – 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	1	0	3	1
Pre- Modification Restructured Balances	$ 133	$ 0	$ 387	$ 18
Post- Modification Restructured Balances	$ 133	$ 0	$ 391	$ 18
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	2
Pre- Modification Restructured Balances	$ 0	$ 0	$ 0	$ 254
Post- Modification Restructured Balances	$ 0	$ 0	$ 0	$ 264
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
Installment loans to individuals | 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
Installment loans to individuals | 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