Loan Quality (Average Impaired Financing Receivables) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 34,134	$ 31,828	$ 34,126	$ 31,729
Interest Income Recognized	81	73	218	248
Residential Real Estate First Liens [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	4,283	556	4,442	787
Interest Income Recognized	8	1	52	11
Residential Real Estate Junior Liens & Lines of Credit [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	722	350	770	326
Interest Income Recognized	1		1	1
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	5,005	906	5,212	1,113
Interest Income Recognized	9	1	53	12
Residential Real Estate - Construction [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	692	10,933	350	10,214
Interest Income Recognized		27		63
Commercial, industrial and agricultural real estate [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	24,218	18,666	24,297	18,574
Interest Income Recognized	36	38	93	155
Commercial, industrial and agricultural [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	4,219	1,323	4,267	1,827
Interest Income Recognized	36	7	72	18
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment				$ 1