Loans (TDR Number Of Contracts Modified And Recorded Investment) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($) contracts	Sep. 30, 2020 USD ($) contracts	Sep. 30, 2021 USD ($) contracts	Sep. 30, 2020 USD ($) contracts
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	45	80	158	244
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 6,980	$ 1,506	$ 11,410	$ 7,390
Loan Modifications on Nonacrrual status	$ 4,500	$ 100	$ 6,100	$ 400
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
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		10
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		$ 152		$ 1,227
Residential Real Estate Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	2	0	5	1
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 221		$ 624	$ 8
Residential Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	3	5	13	24
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 102	$ 367	$ 525	$ 1,740
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
Residential Real Estate Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 55	$ 19	$ 120	$ 254
Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	1	1	5	6
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 33	$ 21	$ 186	$ 43
Construction Real Estate Commercial [Domain]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0	0	1	0
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification			$ 98
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	0		1
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification			$ 351
Commercial Financial Agricultural less PPP and Overdrafts
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	5		9
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 1,251		$ 1,282
Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	5	4	13	8
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 5,053	$ 359	$ 7,708	$ 3,204
Residential Real Estate Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	1	3	7	16
Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts		64		177
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		$ 588		$ 890
Consumer less GFSC and Check Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	28		104
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 265		$ 516
Accruing [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	582	435	2,606	2,449
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
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		35		117
Accruing [Member] | Residential Real Estate Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	96		96
Accruing [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	0	258	148	735
Accruing [Member] | Construction Real Estate - Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		0		0
Accruing [Member] | Residential Real Estate Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	55	12	93	191
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	33	21	80	25
Accruing [Member] | Construction Real Estate Commercial [Domain]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification			98
Accruing [Member] | GFSC loans
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification
Accruing [Member] | Check loans
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification
Accruing [Member] | Finance Leases Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification
Accruing [Member] | Commercial Financial Agricultural less PPP and Overdrafts
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	383		383
Accruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification			1,571	1,136
Accruing [Member] | Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		109		235
Accruing [Member] | Consumer less GFSC and Check Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	15		137
Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	6,398	1,071	8,804	4,941
Nonaccrual [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		117		1,110
Nonaccrual [Member] | Residential Real Estate Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	125		528	8
Nonaccrual [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	102	109	377	1,005
Nonaccrual [Member] | Construction Real Estate - Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification				14
Nonaccrual [Member] | Residential Real Estate Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		7	27	63
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	0	106	18
Nonaccrual [Member] | Finance Leases Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification			351
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	868		899
Nonaccrual [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	5,053	359	6,137	2,068
Nonaccrual [Member] | Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification		$ 479		$ 655
Nonaccrual [Member] | Consumer less GFSC and Check Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification	$ 250		$ 379