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	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	$ 92	$ 39
60-89 Days Past Due	43	670
Over 90 Days Past Due	1,961	1,107
Total Past Due	2,096	1,816
Current	1,080,827	1,025,810
Total	1,082,923	1,027,626
Greater Than 90 Days and Accruing	0	0
Installment Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
Over 90 Days Past Due	0	0
Total Past Due	0	0
Current	4,701	5,806
Total	4,701	5,806
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
Over 90 Days Past Due	0	0
Total Past Due	0	0
Current	376	399
Total	376	399
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	0	0
60-89 Days Past Due	0	40
Over 90 Days Past Due	0	8
Total Past Due	0	48
Current	165,023	146,942
Total	165,023	146,990
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
Over 90 Days Past Due	0	0
Total Past Due	0	0
Current	84,689	101,705
Total	84,689	101,705
Greater Than 90 Days and Accruing	0	0
Real Estate Loans – Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	489,951	439,818
Real Estate Loans – Residential [Member] | First Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	92	39
60-89 Days Past Due	43	305
Over 90 Days Past Due	950	731
Total Past Due	1,085	1,075
Current	449,956	400,256
Total	451,041	401,331
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	0	0
60-89 Days Past Due	0	0
Over 90 Days Past Due	716	281
Total Past Due	716	281
Current	38,194	38,206
Total	38,910	38,487
Greater Than 90 Days and Accruing	0	0
Real Estate Loans – Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	327,622	313,915
Real Estate Loans – Commercial [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	0	0
60-89 Days Past Due	0	325
Over 90 Days Past Due	295	87
Total Past Due	295	412
Current	222,013	205,844
Total	222,308	206,256
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	0	0
Over 90 Days Past Due	0	0
Total Past Due	0	0
Current	105,314	107,659
Total	105,314	107,659
Greater Than 90 Days and Accruing	0	0
Real Estate Loans – Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	10,561	18,993
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
Over 90 Days Past Due	0	0
Total Past Due	0	0
Current	1,559	1,798
Total	1,559	1,798
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
Over 90 Days Past Due	0	0
Total Past Due	0	0
Current	9,002	17,195
Total	9,002	17,195
Greater Than 90 Days and Accruing	$ 0	$ 0