Loans And Allowance For Loan Losses (Summary Of Non Performing Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	$ 6,308	$ 6,980
Accruing loans contractually past due 90 days or more	1	28
Non-Performing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total commercial loans	2,283	2,698
Total consumer loans	4,025	4,282
Total non-accrual loans	6,308	6,980
Accruing loans contractually past due 90 days or more	1	28
Total non-performing loans	6,309	7,008
Commercial Real Estate Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	$ 982	1,279
Accruing loans contractually past due 90 days or more		0
Commercial Real Estate Mortgages [Member] | Non-Performing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total commercial loans	$ 982	1,279
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	190	292
Accruing loans contractually past due 90 days or more	1	0
Commercial And Industrial [Member] | Non-Performing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total commercial loans	190	292
Commercial Construction And Land Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	$ 1,111	1,111
Accruing loans contractually past due 90 days or more		0
Commercial Construction And Land Development [Member] | Non-Performing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total commercial loans	$ 1,111	1,111
Agriculture And Other Loans To Farmers [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans		16
Accruing loans contractually past due 90 days or more		3
Agriculture And Other Loans To Farmers [Member] | Non-Performing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total commercial loans		16
Residential Real Estate Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	$ 3,734	3,452
Accruing loans contractually past due 90 days or more		25
Residential Real Estate Mortgages [Member] | Non-Performing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total consumer loans	$ 3,734	3,452
Home Equity Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans	$ 282	820
Accruing loans contractually past due 90 days or more		0
Home Equity Loans [Member] | Non-Performing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total consumer loans	$ 282	820
Consumer Loans [Member] | Non-Performing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total consumer loans	$ 9	$ 10