Loans (TDR Number Of Contracts Modified And Recorded Investment) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($) contracts	Jun. 30, 2017 USD ($) contracts	Jun. 30, 2018 USD ($) contracts	Jun. 30, 2017 USD ($) contracts
Financing Receivable, Recorded Investment [Line Items]
Additional Specific Reserves Related To Troubled Debt Restructuring	$ 0	$ 10	$ 10	$ 290
Troubled Debt Restructuring, Classification removed	$ 1,900		$ 2,200	$ 0
Number of Contracts | contracts	108	103	182	186
Total Recorded Investment	$ 2,374	$ 3,036	$ 3,767	$ 7,569
Financing Receivable, Modifications, Subsequent Default, Recorded Investment, During Period	$ 1,235	$ 2,110	$ 1,380	$ 2,326
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	0	1	0	1
Total Recorded Investment		$ 8		$ 8
Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	4	3	8	11
Total Recorded Investment	$ 149	$ 164	$ 193	$ 3,052
Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	0	4	0	5
Total Recorded Investment		$ 282		$ 282
Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	4	10	13	19
Total Recorded Investment	$ 317	$ 944	$ 961	$ 1,548
Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	2	0	2	0
Total Recorded Investment	$ 14		$ 14
Residential Real Estate Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	$ 75	$ 40	$ 121	$ 73
Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	6	9	8	12
Total Recorded Investment	$ 452	$ 208	$ 791	$ 406
Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	0	0	1	0
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	3	2	6	6
Total Recorded Investment	$ 589	$ 802	$ 720	$ 1,183
Residential Real Estate Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	4	2	9	3
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	85	72	135	129
Total Recorded Investment	$ 778	$ 588	$ 967	$ 1,017
Accruing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	1,223	1,477	1,511	1,725
Accruing [Member] | Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	0	0	0	0
Accruing [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	123		123
Accruing [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	93	438	93	438
Accruing [Member] | Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	14	0	14	0
Accruing [Member] | Residential Real Estate Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	71	40	104	73
Accruing [Member] | Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	409	160	661	359
Accruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	455	802	455	803
Accruing [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	58	37	61	52
Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	1,151	1,559	2,256	5,844
Nonaccrual [Member] | Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment		8		8
Nonaccrual [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	26	164	70	3,052
Nonaccrual [Member] | Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment		282		282
Nonaccrual [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	224	506	868	1,110
Nonaccrual [Member] | Residential Real Estate Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	4		17
Nonaccrual [Member] | Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	43	48	130	47
Nonaccrual [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	134		265	380
Nonaccrual [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	$ 720	$ 551	$ 906	$ 965