Loans (Recorded Investment In Financing Receivable Modified As TDR Within 12 Months) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) contracts	Mar. 31, 2017 USD ($) contracts	Dec. 31, 2017 USD ($)
Financing Receivable, Recorded Investment [Line Items]
Troubled Debt Restructuring, Classification removed	$ 324	$ 0
Number of Contracts | contracts	56	52
Recorded Investment	$ 1,377	$ 1,987
Financing Receivable, Modifications, Recorded Investment, During Period	1,835	$ 8,085
Troubled Debt Restructuring Included In Nonaccrual Loans	24,000		$ 38,500
Nonaccrual Trouble Debt Restructuring Current	$ 18,500		$ 32,400
Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	3	6
Recorded Investment	$ 207	$ 198
Financing Receivable, Modifications, Recorded Investment, During Period	$ 55	$ 4,098
Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	1	3
Recorded Investment	$ 17	$ 49
Financing Receivable, Modifications, Recorded Investment, During Period		$ 2,140
Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	7	8
Recorded Investment	$ 536	$ 631
Financing Receivable, Modifications, Recorded Investment, During Period	$ 650	$ 608
Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	3	0
Recorded Investment	$ 174
Financing Receivable, Modifications, Recorded Investment, During Period	339	$ 206
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	$ 115	$ 34
Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	0	0
Financing Receivable, Modifications, Recorded Investment, During Period	$ 63
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	$ 364	$ 620
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	1	5
Recorded Investment	$ 114	$ 838
Financing Receivable, Modifications, Recorded Investment, During Period	$ 249	$ 379
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	0	0
Recorded Investment	$ 0	$ 0
Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	0	0
Recorded Investment	$ 0	$ 0
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	0	1
Recorded Investment	$ 0	$ 3
Consumer Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	41	29
Recorded Investment	$ 329	$ 268
Finance Leases Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	0	0
Recorded Investment	$ 0	$ 0
Accruing Financing Receivable Modifications [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	429	3,585
Accruing Financing Receivable Modifications [Member] | Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	0	0
Accruing Financing Receivable Modifications [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		3,079
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	0	0
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	251	200
Accruing Financing Receivable Modifications [Member] | Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	0	0
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	102	34
Accruing Financing Receivable Modifications [Member] | Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	63
Accruing Financing Receivable Modifications [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	13	272
Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	1,406	4,500
Nonaccruing Financing Receivable Modifications [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	55	1,019
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		2,140
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	650	608
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	88	6
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	13
Nonaccruing Financing Receivable Modifications [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	351	348
Nonaccruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	$ 249	$ 379