Loans (Retail Loan Portfolio Categorized By Payment Status) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 1,686,551	$ 1,675,453
Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	126,058	133,341
Residential Mortgage [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	124,299	131,301
Residential Mortgage [Member] | Non-Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,759	2,040
Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	287,844	282,503
Home Equity [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	287,246	281,564
Home Equity [Member] | Non-Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	598	939
Consumer Indirect [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	563,428	559,964
Consumer Indirect [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	562,421	559,073
Consumer Indirect [Member] | Non-Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,007	891
Other Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	24,581	26,657
Other Consumer [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	24,567	26,632
Other Consumer [Member] | Non-Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 14	$ 25