Loans And The Allowance For Credit Losses (Recorded Investment Of Loans, Including Nonaccrual And Restructured Loans, By Class) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
31-60 Days Past Due	$ 441,000	$ 76,000
61-90 Days Past Due	22,000	298,000
91 Days or More Past Due	470,000	542,000
Total Past Due	933,000	916,000
Current	1,181,401,000	1,165,317,000
Total	1,182,334,000	1,166,233,000
91 Days or more past due and Accruing	0	75,000
Installment Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
31-60 Days Past Due	0	0
61-90 Days Past Due	0	0
91 Days or More Past Due	0	0
Total Past Due	0	0
Current	4,504,000	5,655,000
Total	4,504,000	5,655,000
91 Days or more past due and Accruing	0	0
All Other Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
31-60 Days Past Due	0	0
61-90 Days Past Due	0	0
91 Days or More Past Due	0	0
Total Past Due	0	0
Current	33,000	895,000
Total	33,000	895,000
91 Days or more past due and Accruing	0	0
Commercial, Financial And Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
31-60 Days Past Due	49,000	0
61-90 Days Past Due	0	0
91 Days or More Past Due	0	20,000
Total Past Due	49,000	20,000
Current	177,548,000	172,790,000
Total	177,597,000	172,810,000
91 Days or more past due and Accruing	0	0
Municipal Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
31-60 Days Past Due	0	0
61-90 Days Past Due	0	0
91 Days or More Past Due	0	0
Total Past Due	0	0
Current	94,366,000	94,007,000
Total	94,366,000	94,007,000
91 Days or more past due and Accruing	0	0
Real Estate Loans – Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	469,529,000	489,706,000
Real Estate Loans – Residential [Member] | First Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
31-60 Days Past Due	157,000	4,000
61-90 Days Past Due	0	294,000
91 Days or More Past Due	391,000	341,000
Total Past Due	548,000	639,000
Current	431,191,000	452,440,000
Total	431,739,000	453,079,000
91 Days or more past due and Accruing	0	0
Real Estate Loans – Residential [Member] | Second Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
31-60 Days Past Due	33,000	0
61-90 Days Past Due	0	4,000
91 Days or More Past Due	79,000	181,000
Total Past Due	112,000	185,000
Current	37,678,000	36,442,000
Total	37,790,000	36,627,000
91 Days or more past due and Accruing	0	75,000
Real Estate Loans – Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	412,447,000	371,319,000
Real Estate Loans – Commercial [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
31-60 Days Past Due	0	0
61-90 Days Past Due	22,000	0
91 Days or More Past Due	0	0
Total Past Due	22,000	0
Current	260,075,000	224,416,000
Total	260,097,000	224,416,000
91 Days or more past due and Accruing	0	0
Real Estate Loans – Commercial [Member] | Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
31-60 Days Past Due	202,000	72,000
61-90 Days Past Due	0	0
91 Days or More Past Due	0	0
Total Past Due	202,000	72,000
Current	152,148,000	146,831,000
Total	152,350,000	146,903,000
91 Days or more past due and Accruing	0	0
Real Estate Loans – Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	23,858,000	31,841,000
Real Estate Loans – Construction [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
31-60 Days Past Due	0	0
61-90 Days Past Due	0	0
91 Days or More Past Due	0	0
Total Past Due	0	0
Current	4,131,000	2,495,000
Total	4,131,000	2,495,000
91 Days or more past due and Accruing	0	0
Real Estate Loans – Construction [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
31-60 Days Past Due	0	0
61-90 Days Past Due	0	0
91 Days or More Past Due	0	0
Total Past Due	0	0
Current	19,727,000	29,346,000
Total	19,727,000	29,346,000
91 Days or more past due and Accruing	$ 0	$ 0