Loan Quality (Percentage of Loans to Total Gross Loans) (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Percent of Loans to total Gross Loans	100.00%	100.00%
Residential Real Estate First Liens [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Percent of Loans to total Gross Loans	21.00%	19.00%
Residential Real Estate Junior Liens & Lines of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Percent of Loans to total Gross Loans	6.00%	6.00%
Residential Real Estate 1-4 Family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Percent of Loans to total Gross Loans	27.00%	25.00%
Residential Real Estate - Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Percent of Loans to total Gross Loans	2.00%	3.00%
Commercial, industrial and agricultural real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Percent of Loans to total Gross Loans	48.00%	47.00%
Commercial, industrial and agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Percent of Loans to total Gross Loans	22.00%	24.00%
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Percent of Loans to total Gross Loans	1.00%	1.00%