Loans (Recorded Investment In Financing Receivable Modified As TDR Within 12 Months) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($) contracts	Jun. 30, 2016 USD ($) contracts	Jun. 30, 2017 USD ($) contracts	Jun. 30, 2016 USD ($) contracts	Dec. 31, 2016 USD ($)
Financing Receivable, Recorded Investment [Line Items]
Troubled Debt Restructuring, Classification removed		$ 917	$ 0	$ 1,700
Financing Receivable, Modifications, Number of Contracts, During Period \| contracts	103	110	186	194
Number of Contracts \| contracts	70	46	79	49
Recorded Investment	$ 2,110	$ 1,747	$ 2,326	$ 1,775
Financing Receivable, Modifications, Recorded Investment, During Period	3,036	$ 8,827	7,569	$ 10,794
Troubled Debt Restructuring Included In Nonaccrual Loans	43,900		43,900		$ 46,900
Nonaccrual Trouble Debt Restructuring Current	$ 36,700		$ 36,700		$ 38,000
Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period \| contracts	0	1	0	1
Financing Receivable, Modifications, Recorded Investment, During Period		$ 10	$ 0	$ 10
Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period \| contracts	3	10	11	17
Number of Contracts \| contracts	4	0	4	0
Recorded Investment	$ 109		$ 109
Financing Receivable, Modifications, Recorded Investment, During Period	$ 164	$ 3,299	$ 3,052	$ 3,996
Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period \| contracts	4	1	5	3
Number of Contracts \| contracts	1	2	1	2
Recorded Investment	$ 29	$ 563	$ 29	$ 563
Financing Receivable, Modifications, Recorded Investment, During Period	$ 282	$ 132	$ 282	$ 695
Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period \| contracts	10	4	19	9
Number of Contracts \| contracts	10	3	10	3
Recorded Investment	$ 724	$ 288	$ 724	$ 288
Financing Receivable, Modifications, Recorded Investment, During Period	$ 944	$ 441	$ 1,548	$ 752
Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period \| contracts	9	2	12	8
Number of Contracts \| contracts	2	0	2	0
Recorded Investment	$ 10		$ 10
Financing Receivable, Modifications, Recorded Investment, During Period	$ 208	$ 55	$ 406	$ 237
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period \| contracts	1	0	1	0
Financing Receivable, Modifications, Recorded Investment, During Period	$ 8		$ 8
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	$ 40	$ 42	$ 73	$ 42
Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period \| contracts	0	1	0	1
Number of Contracts \| contracts	0	0	0	0
Financing Receivable, Modifications, Recorded Investment, During Period		$ 196	$ 0	$ 196
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period \| contracts	72	85	129	149
Financing Receivable, Modifications, Recorded Investment, During Period	$ 588	$ 745	$ 1,017	$ 958
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period \| contracts	2	4	6	4
Number of Contracts \| contracts	4	1	5	1
Recorded Investment	$ 657	$ 582	$ 834	$ 582
Financing Receivable, Modifications, Recorded Investment, During Period	$ 802	$ 3,907	$ 1,183	$ 3,908
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts \| contracts	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0
Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts \| contracts	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period \| contracts	2	2	3	2
Number of Contracts \| contracts	1	1	1	1
Recorded Investment	$ 2	$ 3	$ 2	$ 3
Consumer Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts \| contracts	48	39	56	42
Recorded Investment	$ 579	$ 311	$ 618	$ 339
Finance Leases Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts \| contracts	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0
Accruing Financing Receivable Modifications [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	1,477	3,555	1,725	3,729
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	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		51	0	51
Accruing Financing Receivable Modifications [Member] \| Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period			0
Accruing Financing Receivable Modifications [Member] \| Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	438	0	438	98
Accruing Financing Receivable Modifications [Member] \| Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	160	17	359	80
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	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	40	39	73	39
Accruing Financing Receivable Modifications [Member] \| Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period			0
Accruing Financing Receivable Modifications [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	37	122	52	134
Accruing Financing Receivable Modifications [Member] \| Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	802	3,326	803	3,327
Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	1,559	5,272	5,844	7,065
Nonaccruing Financing Receivable Modifications [Member] \| Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		10	0	10
Nonaccruing Financing Receivable Modifications [Member] \| Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	164	3,248	3,052	3,945
Nonaccruing Financing Receivable Modifications [Member] \| Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	282	132	282	695
Nonaccruing Financing Receivable Modifications [Member] \| Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	506	441	1,110	654
Nonaccruing Financing Receivable Modifications [Member] \| Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	48	38	47	157
Nonaccruing Financing Receivable Modifications [Member] \| Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	8		8
Nonaccruing Financing Receivable Modifications [Member] \| Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		3	0	3
Nonaccruing Financing Receivable Modifications [Member] \| Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		196	0	196
Nonaccruing Financing Receivable Modifications [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	$ 551	623	965	824
Nonaccruing Financing Receivable Modifications [Member] \| Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		$ 581	$ 380	$ 581