Loans And The Allowance For Credit Losses (Recorded Investment Of Loans, Including Nonaccrual And Restructured Loans, By Class) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	$ 1,068	$ 92
60-89 Days Past Due	237	43
90 Days or More Past Due	1,797	1,961
Total Past Due	3,102	2,096
Current	1,098,611	1,080,827
Financing receivables, Totals	1,101,713	1,082,923
Greater Than 90 Days and Accruing	0	0
Installment Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	1	0
60-89 Days Past Due	0	0
90 Days or More Past Due	0	0
Total Past Due	1	0
Current	5,191	4,701
Financing receivables, Totals	5,192	4,701
Greater Than 90 Days and Accruing	0	0
All Other Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
90 Days or More Past Due	0	0
Total Past Due	0	0
Current	261	376
Financing receivables, Totals	261	376
Greater Than 90 Days and Accruing	0	0
Commercial, Financial And Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	818	0
60-89 Days Past Due	0	0
90 Days or More Past Due	0	0
Total Past Due	818	0
Current	167,682	165,023
Financing receivables, Totals	168,500	165,023
Greater Than 90 Days and Accruing	0	0
Municipal Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
90 Days or More Past Due	0	0
Total Past Due	0	0
Current	85,211	84,689
Financing receivables, Totals	85,211	84,689
Greater Than 90 Days and Accruing	0	0
Real Estate Loans – Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, Totals	504,226	489,951
Real Estate Loans – Residential [Member] | First Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	101	92
60-89 Days Past Due	163	43
90 Days or More Past Due	974	950
Total Past Due	1,238	1,085
Current	465,805	449,956
Financing receivables, Totals	467,043	451,041
Greater Than 90 Days and Accruing	0	0
Real Estate Loans – Residential [Member] | Second Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	80	0
60-89 Days Past Due	0	0
90 Days or More Past Due	716	716
Total Past Due	796	716
Current	36,387	38,194
Financing receivables, Totals	37,183	38,910
Greater Than 90 Days and Accruing	0	0
Real Estate Loans – Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, Totals	324,208	327,622
Real Estate Loans – Commercial [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	68	0
60-89 Days Past Due	0	0
90 Days or More Past Due	107	295
Total Past Due	175	295
Current	221,175	222,013
Financing receivables, Totals	221,350	222,308
Greater Than 90 Days and Accruing	0	0
Real Estate Loans – Commercial [Member] | Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	0	0
60-89 Days Past Due	74	0
90 Days or More Past Due	0	0
Total Past Due	74	0
Current	102,784	105,314
Financing receivables, Totals	102,858	105,314
Greater Than 90 Days and Accruing	0	0
Real Estate Loans – Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, Totals	14,115	10,561
Real Estate Loans – Construction [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
90 Days or More Past Due	0	0
Total Past Due	0	0
Current	1,859	1,559
Financing receivables, Totals	1,859	1,559
Greater Than 90 Days and Accruing	0	0
Real Estate Loans – Construction [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
90 Days or More Past Due	0	0
Total Past Due	0	0
Current	12,256	9,002
Financing receivables, Totals	12,256	9,002
Greater Than 90 Days and Accruing	$ 0	$ 0