Loans (Recorded Investment In Financing Receivable Modified As TDR Within 12 Months) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($) contracts	Sep. 30, 2018 USD ($) contracts	Sep. 30, 2019 USD ($) contracts	Sep. 30, 2018 USD ($) contracts	Dec. 31, 2018 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
Troubled Debt Restructuring, Classification removed	$ 15,000	$ 200,000	$ 38,000	$ 2,400,000
Number of Contracts | contracts	64	52	78	63
Recorded Investment	$ 937,000	$ 1,112,000	$ 1,209,000	$ 1,290,000
Financing Receivable, Modifications, Recorded Investment, During Period	7,866,000	$ 3,704,000	16,229,000	6,566,000
Troubled Debt Restructuring Included In Nonaccrual Loans	29,100,000		29,100,000		$ 24,600,000
Nonaccrual Trouble Debt Restructuring Current	$ 17,200,000		17,200,000		$ 19,200,000
Construction Real Estate - Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period			$ 0	$ 12,000
Commercial Financial And Agricultural [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	2	1	3	1
Recorded Investment	$ 2,000	$ 1,000	$ 65,000	$ 1,000
Financing Receivable, Modifications, Recorded Investment, During Period	$ 5,754,000	$ 574,000	$ 9,296,000	$ 800,000
Residential Real Estate Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	0	0	1	0
Recorded Investment			$ 13,000
Financing Receivable, Modifications, Recorded Investment, During Period	$ 13,000	$ 304,000	$ 49,000	$ 304,000
Residential Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	4	8	7	9
Recorded Investment	$ 257,000	$ 688,000	$ 370,000	$ 789,000
Financing Receivable, Modifications, Recorded Investment, During Period	$ 501,000	$ 246,000	$ 1,013,000	$ 1,062,000
Residential Real Estate - HELOC [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	5	3	7	3
Recorded Investment	$ 135,000	$ 108,000	$ 165,000	$ 108,000
Financing Receivable, Modifications, Recorded Investment, During Period	138,000	469,000	364,000	860,000
Construction Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period			0	0
Residential Real Estate - Installment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	$ 421,000	$ 336,000	$ 1,003,000	$ 453,000
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	$ 82,000		$ 82,000	$ 0
Consumer Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	$ 716,000	$ 621,000	$ 1,186,000	$ 1,216,000
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	$ 241,000	$ 1,154,000	$ 3,236,000	$ 1,859,000
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	$ 66,000	$ 0	$ 66,000	$ 0
Consumer Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Contracts | contracts	51	40	58	50
Recorded Investment	$ 477,000	$ 315,000	$ 530,000	$ 392,000
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	1,745,000	897,000	4,943,000	2,043,000
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	0	0	12,000
Accruing Financing Receivable Modifications [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	752,000	22,000	3,237,000	208,000
Accruing Financing Receivable Modifications [Member] | Residential Real Estate Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	13,000	55,000	13,000	55,000
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	286,000	0	340,000	90,000
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	31,000	453,000	121,000	735,000
Accruing Financing Receivable Modifications [Member] | Construction Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	0	0	0	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	407,000	336,000	951,000	437,000
Accruing Financing Receivable Modifications [Member] | Construction Real Estate Commercial [Domain]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	82,000		82,000	0
Accruing Financing Receivable Modifications [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	174,000	31,000	199,000	59,000
Accruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period			0	447,000
Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	6,121,000	2,807,000	11,286,000	4,523,000
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	5,002,000	552,000	6,059,000	592,000
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		249,000	36,000	249,000
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	215,000	246,000	673,000	972,000
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	107,000	16,000	243,000	125,000
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	14,000		52,000	16,000
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	542,000	590,000	987,000	1,157,000
Nonaccruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	$ 241,000	$ 1,154,000	$ 3,236,000	$ 1,412,000