Allowance For Loan Losses (Schedule Of Non-Commercial Loans By Payment Performance) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Total	$ 2,577,777	$ 2,606,197
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,242,972	1,204,450
Residential Real Estate [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,239,717	1,201,631
Residential Real Estate [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	3,255	2,819
Home equity - junior lien [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	145,452	146,090
Home equity - junior lien [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	145,217	145,812
Home equity - junior lien [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	235	278
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	42,858	46,402
Consumer [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	42,841	46,353
Consumer [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	17	49
Demand Deposit Account Overdrafts [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	3,501	3,905
Demand Deposit Account Overdrafts [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	3,501	3,900
Demand Deposit Account Overdrafts [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 0	$ 5