Loan Quality (Schedule of Financing Receivables, Non Accrual Status) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 27,770		$ 17,756
Loans past due 90 days or more and still accruing	1,714		4,772
Total nonaccrual and loans past due 90 days or more	29,484		22,528
Repossessed assets	7		6
Other real estate owned	3,290	[1]	3,224	[1]
Total Nonperforming Assets	32,781		25,758
Residential Real Estate First Liens [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	3,951		1,749
% of Loan Segment	2.80%		1.20%
Loans past due 90 days or more and still accruing	345		2,516
Residential Real Estate Junior Liens & Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	882		282
% of Loan Segment	1.90%		0.60%
Loans past due 90 days or more and still accruing	45		301
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	4,833		2,031
% of Loan Segment	2.60%		1.10%
Loans past due 90 days or more and still accruing	390		2,817
Residential Real Estate - Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	575
% of Loan Segment	3.80%
Loans past due 90 days or more and still accruing	112		121
Commercial, industrial and agricultural real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	20,965		14,278
% of Loan Segment	5.70%		4.00%
Loans past due 90 days or more and still accruing	1,082		1,627
Commercial, industrial and agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	1,397		1,447
% of Loan Segment	0.80%		0.80%
Loans past due 90 days or more and still accruing	102		100
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans past due 90 days or more and still accruing	$ 28		$ 107

[1] (1) Includes assets directly charged-down to fair value during the year-to-date period