Loan Quality (Average Impaired Financing Receivables) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 36,147	$ 31,129
Interest Income Recognized	321	813
Residential Real Estate First Liens [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	4,070	2,170
Interest Income Recognized	58	190
Residential Real Estate Junior Liens & Lines of Credit [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	744	317
Interest Income Recognized	1	14
Residential Real Estate 1-4 Family [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	4,814	2,487
Interest Income Recognized	59	204
Residential Real Estate - Construction [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	458	7,147
Commercial, industrial and agricultural real estate [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	26,815	19,152
Interest Income Recognized	151	530
Commercial, industrial and agricultural [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	4,060	2,342
Interest Income Recognized	111	79
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		$ 1