Loans And Allowance For Loan Losses (Summary Of Non Performing Loans) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans contractually past due 90 days or more	$ 954
Non-Performing Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total commercial loans	6,713	8,102
Total consumer loans	3,080	4,805
Total non-accrual loans	9,793	12,907
Accruing loans contractually past due 90 days or more	954
Total non-performing loans	10,747	12,907
Allowance for loan losses to non-performing loans	75.00%	64.00%
Non-performing loans to total loans	1.33%	1.77%
Allowance to total loans	1.00%	1.13%
Commercial Real Estate Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans contractually past due 90 days or more	196
Commercial Real Estate Mortgages [Member] | Non-Performing Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total commercial loans	2,929	2,676
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans contractually past due 90 days or more	154
Commercial And Industrial [Member] | Non-Performing Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total commercial loans	589	1,078
Commercial Construction And Land Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans contractually past due 90 days or more
Commercial Construction And Land Development [Member] | Non-Performing Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total commercial loans	2,599	3,753
Agriculture And Other Loans To Farmers [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans contractually past due 90 days or more
Agriculture And Other Loans To Farmers [Member] | Non-Performing Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total commercial loans	596	595
Residential Real Estate Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans contractually past due 90 days or more	572
Residential Real Estate Mortgages [Member] | Non-Performing Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total consumer loans	2,713	4,266
Home Equity Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans contractually past due 90 days or more	29
Home Equity Loans [Member] | Non-Performing Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total consumer loans	306	266
Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans contractually past due 90 days or more	3
Consumer Loans [Member] | Non-Performing Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total consumer loans	$ 61	$ 273