Loans And The Allowance For Credit Losses (Allowance For Loan Losses And The Recorded Investment In Loans) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance individually evaluated for impairment	$ 100		$ 112
Ending balance collectively evaluated for impairment	12,758		12,716
Financing receivables, Ending balance individually evaluated for impairment	732		906
Financing receivables, Ending balance collectively evaluated for impairment	1,155,931		1,165,327
Financing receivables, Totals	1,156,663		1,166,233
Allowance for loan losses	12,019		12,042
Reserve for undisbursed lines of credit	839		786
Total allowance for credit losses	12,858	12,906	12,828	12,991	12,658	12,312
Commercial, Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance individually evaluated for impairment			2
Ending balance collectively evaluated for impairment	3,403		3,352
Financing receivables, Ending balance individually evaluated for impairment	64		20
Financing receivables, Ending balance collectively evaluated for impairment	183,005		172,790
Financing receivables, Totals	183,069		172,810
Allowance for loan losses	2,798		2,740
Reserve for undisbursed lines of credit	605		614
Total allowance for credit losses	3,403	3,656	3,354	3,424	3,274	3,447
Municipal Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance collectively evaluated for impairment	702		768
Financing receivables, Ending balance collectively evaluated for impairment	96,258		94,007
Financing receivables, Totals	96,258		94,007
Allowance for loan losses	688		758
Reserve for undisbursed lines of credit	14		10
Total allowance for credit losses	702	386	768	746	400	522
Real Estate Loans – Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance individually evaluated for impairment	34		41
Ending balance collectively evaluated for impairment	3,247		3,040
Financing receivables, Ending balance individually evaluated for impairment	514		722
Financing receivables, Ending balance collectively evaluated for impairment	472,472		488,984
Financing receivables, Totals	472,986		489,706
Allowance for loan losses	3,195		2,995
Reserve for undisbursed lines of credit	86		86
Total allowance for credit losses	3,281	3,246	3,081	3,144	3,385	3,421
Real Estate Loans – Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance individually evaluated for impairment	66		69
Ending balance collectively evaluated for impairment	4,978		5,016
Financing receivables, Ending balance individually evaluated for impairment	154		164
Financing receivables, Ending balance collectively evaluated for impairment	381,147		371,155
Financing receivables, Totals	381,301		371,319
Allowance for loan losses	5,005		5,040
Reserve for undisbursed lines of credit	39		45
Total allowance for credit losses	5,044	5,089	5,085	5,118	5,018	4,660
Real Estate Loans – Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance collectively evaluated for impairment	400		512
Financing receivables, Ending balance collectively evaluated for impairment	17,970		31,841
Financing receivables, Totals	17,970		31,841
Allowance for loan losses	305		481
Reserve for undisbursed lines of credit	95		31
Total allowance for credit losses	400	494	512	533	551	234
Installment Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance collectively evaluated for impairment	16		18
Financing receivables, Ending balance collectively evaluated for impairment	4,793		5,655
Financing receivables, Totals	4,793		5,655
Allowance for loan losses	16		18
Total allowance for credit losses	16	18	18	18	21	17
All Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance collectively evaluated for impairment	12		10
Financing receivables, Ending balance collectively evaluated for impairment	286		895
Financing receivables, Totals	286		895
Allowance for loan losses	12		10
Total allowance for credit losses	$ 12	$ 17	$ 10	$ 8	$ 9	$ 11