Loans (Recorded Investment In Financing Receivable Modified As TDR Within 12 Months) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) contracts	Mar. 31, 2016 USD ($) contracts	Dec. 31, 2016 USD ($)
Financing Receivable, Recorded Investment [Line Items]
Troubled Debt Restructuring, Classification removed	$ 0	$ 806
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	83	84
Number of Contracts | contracts	52	55
Recorded Investment	$ 1,987	$ 1,095
Financing Receivable, Modifications, Recorded Investment, During Period	8,085	$ 2,529
Troubled Debt Restructuring Included In Nonaccrual Loans	47,800		$ 46,900
Nonaccrual Trouble Debt Restructuring Current	$ 40,200		$ 38,000
Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	0	0
Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	6	7
Number of Contracts | contracts	6	1
Recorded Investment	$ 198	$ 1
Financing Receivable, Modifications, Recorded Investment, During Period	$ 4,098	$ 847
Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	3	2
Number of Contracts | contracts	3	1
Recorded Investment	$ 49	$ 90
Financing Receivable, Modifications, Recorded Investment, During Period	$ 2,140	$ 617
Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	9	5
Number of Contracts | contracts	8	8
Recorded Investment	$ 631	$ 516
Financing Receivable, Modifications, Recorded Investment, During Period	$ 608	$ 316
Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	3	6
Number of Contracts | contracts	0	0
Financing Receivable, Modifications, Recorded Investment, During Period	$ 206	$ 186
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	0	0
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	$ 34
Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	0	0
Number of Contracts | contracts	0	0
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	57	64
Financing Receivable, Modifications, Recorded Investment, During Period	$ 620	$ 563
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	4	0
Number of Contracts | contracts	5	0
Recorded Investment	$ 838
Financing Receivable, Modifications, Recorded Investment, During Period	$ 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]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	1	0
Number of Contracts | contracts	1	1
Recorded Investment	$ 3	$ 25
Consumer Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	29	44
Recorded Investment	$ 268	$ 463
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	3,585	346
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	131
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	0	99
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	200	64
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	34
Accruing Financing Receivable Modifications [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	272	52
Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	4,500	2,183
Nonaccruing Financing Receivable Modifications [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	1,019	716
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	617
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	608	217
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	6	122
Nonaccruing Financing Receivable Modifications [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	348	$ 511
Nonaccruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	$ 379