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Loans and Asset Quality Information (Schedule of Information of Loans Modified in Troubled Debt Restructuring) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) contract	Dec. 31, 2018 USD ($) contract	Dec. 31, 2017 USD ($) contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	6	6	10
Pre- Modification Restructured Balances	$ 1,056	$ 655	$ 4,452
Post- Modification Restructured Balances	$ 1,060	$ 684	$ 4,414
Commercial, financial, and agricultural | TDRs – Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	2	0	0
Pre- Modification Restructured Balances	$ 395	$ 0	$ 0
Post- Modification Restructured Balances	$ 395	$ 0	$ 0
Commercial, financial, and agricultural | TDRs – Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	0	1
Pre- Modification Restructured Balances	$ 0	$ 0	$ 38
Post- Modification Restructured Balances	$ 0	$ 0	$ 25
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
Pre- Modification Restructured Balances	$ 0	$ 0	$ 0
Post- Modification Restructured Balances	$ 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	1	1
Pre- Modification Restructured Balances	$ 0	$ 61	$ 32
Post- Modification Restructured Balances	$ 0	$ 61	$ 32
Real estate, commercial | Real estate – mortgage – commercial and other | TDRs – Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	1	0	6
Pre- Modification Restructured Balances	$ 274	$ 0	$ 4,120
Post- Modification Restructured Balances	$ 274	$ 0	$ 4,095
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
Pre- Modification Restructured Balances	$ 0	$ 0	$ 0
Post- Modification Restructured Balances	$ 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	3	2	0
Pre- Modification Restructured Balances	$ 387	$ 254	$ 0
Post- Modification Restructured Balances	$ 391	$ 273	$ 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	3	2
Pre- Modification Restructured Balances	$ 0	$ 340	$ 262
Post- Modification Restructured Balances	$ 0	$ 350	$ 262
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
Pre- Modification Restructured Balances	$ 0	$ 0	$ 0
Post- Modification Restructured Balances	$ 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
Pre- Modification Restructured Balances	$ 0	$ 0	$ 0
Post- Modification Restructured Balances	$ 0	$ 0	$ 0
Installment loans to individuals | TDRs – Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	0	0
Pre- Modification Restructured Balances	$ 0	$ 0	$ 0
Post- Modification Restructured Balances	$ 0	$ 0	$ 0
Installment loans to individuals | TDRs – Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	0	0
Pre- Modification Restructured Balances	$ 0	$ 0	$ 0
Post- Modification Restructured Balances	$ 0	$ 0	$ 0

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Topic 310
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-Section 50
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-Name Accounting Standards Codification
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