Loans (Recorded Investment In Financing Receivable Modified As TDR Within 12 Months) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) contracts	Jun. 30, 2018 USD ($) contracts	Jun. 30, 2019 USD ($) contracts	Jun. 30, 2018 USD ($) contracts	Dec. 31, 2018 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
Troubled Debt Restructuring, Classification removed	$ 0	$ 1,900,000	$ 23,000	$ 2,200,000
Number of Contracts | contracts	79	52	90	58
Recorded Investment	$ 1,244,000	$ 1,235,000	$ 1,396,000	$ 1,380,000
Financing Receivable, Modifications, Recorded Investment, During Period	5,244,000	2,374,000	9,182,000	3,767,000
Troubled Debt Restructuring Included In Nonaccrual Loans	24,100,000		24,100,000		$ 24,600,000
Nonaccrual Trouble Debt Restructuring Current	$ 12,100,000		12,100,000		$ 19,200,000
Construction Real Estate - Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		$ 14,000	$ 0	$ 14,000
Commercial Financial And Agricultural [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	6	3	7	3
Recorded Investment	$ 91,000	$ 144,000	$ 160,000	$ 144,000
Financing Receivable, Modifications, Recorded Investment, During Period	$ 2,444,000	$ 149,000	$ 2,900,000	$ 193,000
Residential Real Estate Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0	0	0	0
Financing Receivable, Modifications, Recorded Investment, During Period	$ 36,000		$ 36,000	$ 0
Residential Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	5	6	7	7
Recorded Investment	$ 345,000	$ 600,000	$ 382,000	$ 703,000
Financing Receivable, Modifications, Recorded Investment, During Period	$ 374,000	$ 317,000	$ 673,000	$ 961,000
Residential Real Estate - HELOC [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	5	1	5	1
Recorded Investment	$ 67,000	$ 88,000	$ 67,000	$ 88,000
Financing Receivable, Modifications, Recorded Investment, During Period	166,000	452,000	236,000	791,000
Construction Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	71,000		71,000	0
Residential Real Estate - Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	$ 410,000	$ 75,000	$ 596,000	$ 121,000
Construction Real Estate Commercial [Domain]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0	0	0	0
Financing Receivable, Modifications, Recorded Investment, During Period			$ 456,000	$ 0
Consumer Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	$ 963,000	$ 778,000	$ 1,219,000	$ 967,000
Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0	0	0	0
Financing Receivable, Modifications, Recorded Investment, During Period	$ 780,000	$ 589,000	$ 2,995,000	$ 720,000
Construction Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0
Construction Real Estate - Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0
Residential Real Estate - Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	2	0	2	0
Recorded Investment	$ 67,000	$ 0	$ 67,000	$ 0
Consumer Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	61	42	69	47
Recorded Investment	$ 674,000	$ 403,000	$ 720,000	$ 445,000
Finance Leases Financing Receivable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0
Accruing Financing Receivable Modifications [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	2,397,000	1,223,000	3,092,000	1,511,000
Accruing Financing Receivable Modifications [Member] | Construction Real Estate - Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	0	14,000	0	14,000
Accruing Financing Receivable Modifications [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	1,802,000	123,000	1,801,000	123,000
Accruing Financing Receivable Modifications [Member] | Residential Real Estate Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period			0	0
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	0	93,000	54,000	93,000
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	99,000	409,000	100,000	661,000
Accruing Financing Receivable Modifications [Member] | Construction Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	71,000	0	71,000	0
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	365,000	71,000	550,000	104,000
Accruing Financing Receivable Modifications [Member] | Construction Real Estate Commercial [Domain]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period			456,000	0
Accruing Financing Receivable Modifications [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	60,000	58,000	60,000	61,000
Accruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		455,000	0	455,000
Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	2,847,000	1,151,000	6,090,000	2,256,000
Nonaccruing Financing Receivable Modifications [Member] | Construction Real Estate - Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period			0	0
Nonaccruing Financing Receivable Modifications [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	642,000	26,000	1,099,000	70,000
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	36,000		36,000	0
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	374,000	224,000	619,000	868,000
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	67,000	43,000	136,000	130,000
Nonaccruing Financing Receivable Modifications [Member] | Construction Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period			0	0
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	45,000	4,000	46,000	17,000
Nonaccruing Financing Receivable Modifications [Member] | Construction Real Estate Commercial [Domain]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period			0	0
Nonaccruing Financing Receivable Modifications [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	903,000	720,000	1,159,000	906,000
Nonaccruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	$ 780,000	$ 134,000	$ 2,995,000	$ 265,000