Loan Quality (Impaired Financing Receivables) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	$ 28,147	$ 11,370
Unpaid Principal Balance With No Allowance	32,939	12,408
Recorded Investment With Allowance	4,756	16,664
Unpaid Principal Balance With Allowance	5,858	18,446
Related Allowance	1,152	2,959
Residential Real Estate First Liens [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	3,924	176
Unpaid Principal Balance With No Allowance	4,157	177
Recorded Investment With Allowance	38	3,723
Unpaid Principal Balance With Allowance	41	3,867
Related Allowance	2	495
Residential Real Estate Junior Liens & Lines of Credit [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	656	28
Unpaid Principal Balance With No Allowance	660	30
Recorded Investment With Allowance	58	134
Unpaid Principal Balance With Allowance	62	134
Related Allowance		3
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	4,580	204
Unpaid Principal Balance With No Allowance	4,817	207
Recorded Investment With Allowance	96	3,857
Unpaid Principal Balance With Allowance	103	4,001
Related Allowance	2	498
Residential Real Estate - Construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	575
Unpaid Principal Balance With No Allowance	836
Recorded Investment With Allowance		43
Unpaid Principal Balance With Allowance		43
Commercial, industrial and agricultural real estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	20,534	11,072
Unpaid Principal Balance With No Allowance	24,746	12,092
Recorded Investment With Allowance	3,250	10,550
Unpaid Principal Balance With Allowance	3,972	12,050
Related Allowance	493	1,591
Commercial, industrial and agricultural [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	2,458	94
Unpaid Principal Balance With No Allowance	2,540	109
Recorded Investment With Allowance	1,410	2,214
Unpaid Principal Balance With Allowance	1,783	2,352
Related Allowance	$ 657	$ 870