Loans And The Allowance For Credit Losses (Recorded Investment Of Loans, Including Nonaccrual And Restructured Loans, By Class) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 792	$ 933
Current	1,257,140	1,181,401
Financing receivables, Totals	1,257,932	1,182,334
91 Days more past due and Accruing	0
91 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	587	470
61 to 90 Days Part Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		22
31 to 60 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	205	441
Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, Totals		4,131
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, Totals		19,727
Commercial, Financial And Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	38	49
Current	207,029	177,548
Financing receivables, Totals	207,067	177,597
Commercial, Financial And Agricultural [Member] | 31 to 60 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	38	49
Municipal Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	108,423	94,366
Financing receivables, Totals	108,423	94,366
Real Estate Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, Totals	448,632	469,529
Real Estate Residential [Member] | First Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	754	548
Current	413,328	431,191
Financing receivables, Totals	414,082	431,739
Real Estate Residential [Member] | First Mortgage [Member] | 91 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	587	391
Real Estate Residential [Member] | First Mortgage [Member] | 31 to 60 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	167	157
Real Estate Residential [Member] | Second Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		112
Current	34,550	37,678
Financing receivables, Totals	34,550	37,790
Real Estate Residential [Member] | Second Mortgage [Member] | 91 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		79
Real Estate Residential [Member] | Second Mortgage [Member] | 31 to 60 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		33
Real Estate Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, Totals	450,673	412,447
Real Estate Commercial [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	178,995	179,851
Financing receivables, Totals	178,995	179,851
Real Estate Commercial [Member] | Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		224
Current	271,678	232,372
Financing receivables, Totals	271,678	232,596
Real Estate Commercial [Member] | Non-Owner Occupied [Member] | 61 to 90 Days Part Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		22
Real Estate Commercial [Member] | Non-Owner Occupied [Member] | 31 to 60 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		202
Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, Totals	40,748	23,858
Construction [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,118	4,131
Financing receivables, Totals	2,118	4,131
Construction [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	38,630	19,727
Financing receivables, Totals	38,630	19,727
Installment Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,370	4,504
Financing receivables, Totals	2,370	4,504
All Other Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	19	33
Financing receivables, Totals	$ 19	$ 33