Loan Quality (Schedule of Financing Receivables, Non Accrual Status) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 34,320	$ 36,394
Loans past due 90 days or more and still accruing	338	563
Total nonaccrual and loans past due 90 days or more	34,658	36,957
Other real estate owned	5,420	5,127
Total Nonperforming Assets	40,078	42,084
Residential Real Estate First Liens [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	3,501	3,584
% of Loan Segment	2.30%	2.30%
Loans past due 90 days or more and still accruing	51	120
Residential Real Estate Junior Liens & Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	705	758
% of Loan Segment	1.70%	1.80%
Loans past due 90 days or more and still accruing	211	112
Residential Real Estate 1-4 Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	4,206	4,342
% of Loan Segment	2.20%	2.20%
Loans past due 90 days or more and still accruing	262	232
Residential Real Estate - Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	554	557
% of Loan Segment	3.90%	3.60%
Commercial, industrial and agricultural real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	26,760	28,659
% of Loan Segment	7.30%	7.90%
Loans past due 90 days or more and still accruing	62	315
Commercial, industrial and agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	2,800	2,836
% of Loan Segment	1.70%	1.70%
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans past due 90 days or more and still accruing	$ 14	$ 16