Loans (TDR Number Of Contracts Modified And Recorded Investment) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($) contracts	Jun. 30, 2020 USD ($) contracts	Jun. 30, 2021 USD ($) contracts	Jun. 30, 2020 USD ($) contracts
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	62	82	113	164
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 3,796,000	$ 4,215,000	$ 5,125,000	$ 7,120,000
Loan Modifications on Nonacrrual status	$ 600,000	$ 43,000	$ 1,600,000	$ 300,000
Construction Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts		0		1
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification				$ 10,000
Construction Real Estate Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0		0
Commercial Financial And Agricultural [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts		3		7
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		$ 84,000		$ 1,156,000
Residential Real Estate Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	3	1	3	1
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 406,000	$ 16,000	$ 406,000	$ 16,000
Residential Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	4	13	10	19
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 253,000	$ 1,790,000	$ 493,000	$ 2,103,000
Construction Real Estate - Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts		0		1
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification				$ 14,000
Residential Real Estate Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 2,000	$ 140,000	$ 70,000	$ 262,000
Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	4	2	4	5
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 167,000	$ 28,000	$ 167,000	$ 40,000
Construction Real Estate Commercial [Domain]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	1	0	1	0
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 98,000		$ 98,000
PPP loans receivable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0		0
Bank Overdrafts
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0		0
GFSC loans
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0		0
Check loans
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0		0
Finance Leases Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	1		1
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 362,000		$ 362,000
Commercial Financial Agricultural less PPP and Overdrafts
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	3		4
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 334,000		$ 334,000
Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	3	2	8	4
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 1,808,000	$ 1,643,000	$ 2,700,000	$ 2,844,000
Residential Real Estate Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	1	5	6	13
Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts		56		113
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		$ 514,000		$ 675,000
Consumer less GFSC and Check Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	42		76
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 366,000		$ 495,000
Accruing [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	1,970,000	1,146,000	2,195,000	2,579,000
Accruing [Member] | Construction Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		0		10,000
Accruing [Member] | Construction Real Estate Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	0		0
Accruing [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		82,000		82,000
Accruing [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	58,000	868,000	193,000	980,000
Accruing [Member] | Construction Real Estate - Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		0		14,000
Accruing [Member] | Residential Real Estate Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	2,000	108,000	42,000	213,000
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	134,000	0	134,000	3,000
Accruing [Member] | Construction Real Estate Commercial [Domain]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	98,000		98,000
Accruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	1,601,000		1,601,000	1,141,000
Accruing [Member] | Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		88,000		136,000
Accruing [Member] | Consumer less GFSC and Check Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	77,000		127,000
Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	1,826,000	3,069,000	2,930,000	4,541,000
Nonaccrual [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		2,000		1,074,000
Nonaccrual [Member] | Residential Real Estate Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	406,000	16,000	406,000	16,000
Nonaccrual [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	195,000	922,000	300,000	1,123,000
Nonaccrual [Member] | Residential Real Estate Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		32,000	28,000	49,000
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	33,000	28,000	33,000	37,000
Nonaccrual [Member] | Finance Leases Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	362,000		362,000
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	334,000		334,000
Nonaccrual [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	207,000	1,643,000	1,099,000	1,703,000
Nonaccrual [Member] | Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		$ 426,000		$ 539,000
Nonaccrual [Member] | Consumer less GFSC and Check Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 289,000		$ 368,000