Loans And Allowance For Loan Losses (Summary Of Non Performing Loans) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Total commercial loans	$ 423,377	$ 404,574
Total consumer loans	340,013	314,167
Accruing loans contractually past due 90 days or more	207
Non-Performing Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total commercial loans	7,657	8,102
Total consumer loans	3,072	4,805
Total non-accrual loans	10,729	12,907
Accruing loans contractually past due 90 days or more	207
Total non-performing loans	10,936	12,907
Allowance for loan losses to non-performing loans	76.00%	64.00%
Non-performing loans to total loans	1.41%	1.77%
Allowance to total loans	1.08%	1.13%
Commercial Real Estate Mortgages [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total commercial loans	302,066	285,484
Accruing loans contractually past due 90 days or more
Commercial Real Estate Mortgages [Member] | Non-Performing Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total commercial loans	2,588	2,676
Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total commercial loans	69,999	62,450
Accruing loans contractually past due 90 days or more
Commercial And Industrial [Member] | Non-Performing Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total commercial loans	636	1,078
Commercial Construction And Land Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total commercial loans	25,106	30,060
Accruing loans contractually past due 90 days or more
Commercial Construction And Land Development [Member] | Non-Performing Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total commercial loans	3,753	3,753
Agriculture And Other Loans To Farmers [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total commercial loans	26,206	26,580
Accruing loans contractually past due 90 days or more	1
Agriculture And Other Loans To Farmers [Member] | Non-Performing Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total commercial loans	680	595
Residential Real Estate Mortgages [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total consumer loans	267,921	239,799
Accruing loans contractually past due 90 days or more	206
Residential Real Estate Mortgages [Member] | Non-Performing Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total consumer loans	2,740	4,266
Home Equity Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total consumer loans	52,104	51,462
Accruing loans contractually past due 90 days or more
Home Equity Loans [Member] | Non-Performing Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total consumer loans	252	266
Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total consumer loans	19,988	22,906
Accruing loans contractually past due 90 days or more
Consumer Loans [Member] | Non-Performing Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total consumer loans	$ 80	$ 273