Loans And Allowance For Loan Losses (Summary Of Composition Of Loan Portfolio) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 808,412	$ 729,003
Net deferred loan costs and fees	(593)	562
Allowance for loan losses	(8,053)	(8,221)
Total loans net of allowance for loan losses	800,359	720,782
Commercial Real Estate Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	298,784	285,484
Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	78,623	62,450
Commercial Construction And Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	25,106	30,060
Agricultural And Other Loans To Farmers [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	26,206	26,580
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	428,719	404,574
Residential Real Estate Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	292,122	239,799
Home Equity Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	53,044	51,462
Other Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	19,678	22,906
Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	364,844	314,167
Tax Exempt Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 15,442	$ 9,700