Loans And The Allowance For Credit Losses (Allowance For Loan Losses And The Recorded Investment In Loans) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance individually evaluated for impairment	$ 132	$ 112
Ending balance collectively evaluated for impairment	12,797	12,716
Financing receivables, Ending balance individually evaluated for impairment	1,006	906
Financing receivables, Ending balance collectively evaluated for impairment	1,170,731	1,165,327
Financing receivables, Totals	1,171,737	1,166,233
Allowance for loan losses	12,174	12,042
Reserve for undisbursed lines of credit	755	786
Total allowance for credit losses	12,929	12,828	12,588	12,312
Commercial, Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance individually evaluated for impairment	1	2
Ending balance collectively evaluated for impairment	3,377	3,352
Financing receivables, Ending balance individually evaluated for impairment	120	20
Financing receivables, Ending balance collectively evaluated for impairment	190,720	172,790
Financing receivables, Totals	190,840	172,810
Allowance for loan losses	2,792	2,740
Reserve for undisbursed lines of credit	586	614
Total allowance for credit losses	3,378	3,354	3,411	3,447
Municipal Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance collectively evaluated for impairment	693	768
Financing receivables, Ending balance collectively evaluated for impairment	93,176	94,007
Financing receivables, Totals	93,176	94,007
Allowance for loan losses	681	758
Reserve for undisbursed lines of credit	12	10
Total allowance for credit losses	693	768	655	522
Real Estate Loans – Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance individually evaluated for impairment	63	41
Ending balance collectively evaluated for impairment	3,289	3,040
Financing receivables, Ending balance individually evaluated for impairment	724	722
Financing receivables, Ending balance collectively evaluated for impairment	482,051	488,984
Financing receivables, Totals	482,775	489,706
Allowance for loan losses	3,260	2,995
Reserve for undisbursed lines of credit	92	86
Total allowance for credit losses	3,352	3,081	3,708	3,582
Real Estate Loans – Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance individually evaluated for impairment	68	69
Ending balance collectively evaluated for impairment	5,051	5,016
Financing receivables, Ending balance individually evaluated for impairment	162	164
Financing receivables, Ending balance collectively evaluated for impairment	371,993	371,155
Financing receivables, Totals	372,155	371,319
Allowance for loan losses	5,077	5,040
Reserve for undisbursed lines of credit	42	45
Total allowance for credit losses	5,119	5,085	4,511	4,499
Real Estate Loans – Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance collectively evaluated for impairment	360	512
Financing receivables, Ending balance collectively evaluated for impairment	27,567	31,841
Financing receivables, Totals	27,567	31,841
Allowance for loan losses	340	481
Reserve for undisbursed lines of credit	20	31
Total allowance for credit losses	360	512	275	234
Installment Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance collectively evaluated for impairment	18	18
Financing receivables, Ending balance collectively evaluated for impairment	4,993	5,655
Financing receivables, Totals	4,993	5,655
Allowance for loan losses	15	18
Reserve for undisbursed lines of credit	3
Total allowance for credit losses	18	18	16	17
All Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance collectively evaluated for impairment	9	10
Financing receivables, Ending balance collectively evaluated for impairment	231	895
Financing receivables, Totals	231	895
Allowance for loan losses	9	10
Total allowance for credit losses	$ 9	$ 10	$ 12	$ 11