Loans (TDR Number Of Contracts Modified And Recorded Investment) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) contracts	Mar. 31, 2020 USD ($) contracts
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	51	82
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 2,606	$ 3,408
Loan Modifications on Nonacrrual status	$ 1,700	$ 300
Construction Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts		1
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		$ 11
Construction Real Estate Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0
Commercial Financial And Agricultural [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts		4
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		$ 1,094
Residential Real Estate Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0	0
Residential Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	6	6
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 276	$ 391
Construction Real Estate - Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts		1
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		$ 15
Residential Real Estate Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 146	$ 127
Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0	3
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 0	$ 110
Construction Real Estate Commercial [Domain]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0	0
PPP loans receivable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0
Bank Overdrafts
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0
GFSC loans
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0
Check loans
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0
Finance Leases Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0
Commercial Financial Agricultural less PPP and Overdrafts
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	1
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 200
Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	5	2
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 1,625	$ 1,196
Residential Real Estate Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	5	8
Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts		57
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		$ 464
Consumer less GFSC and Check Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	34
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 359
Accruing [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	599	1,596
Accruing [Member] | Construction Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		11
Accruing [Member] | Construction Real Estate Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	0
Accruing [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	137	111
Accruing [Member] | Construction Real Estate - Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		15
Accruing [Member] | Residential Real Estate Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	118	110
Accruing [Member] | Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	0	101
Accruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	272	1,136
Accruing [Member] | Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		112
Accruing [Member] | Consumer less GFSC and Check Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	72
Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	2,007	1,812
Nonaccrual [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		1,094
Nonaccrual [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	139	280
Nonaccrual [Member] | Residential Real Estate Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	28	17
Nonaccrual [Member] | Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	0	9
Nonaccrual [Member] | Commercial Financial Agricultural less PPP and Overdrafts
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	200
Nonaccrual [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	1,353	60
Nonaccrual [Member] | Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		$ 352
Nonaccrual [Member] | Consumer less GFSC and Check Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 287