Allowance for Loan and Lease Loss and Credit Quality (Schedule Of Troubled Debt Restructuring By Accrual versus Non-Accrual Status) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Recorded Investments	$ 41,207	$ 66,696
Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Recorded Investments	31,355	54,836
Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Recorded Investments	9,852	11,860
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Recorded Investments	19,219	51,136
Commercial Real Estate [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Recorded Investments	17,895	48,817
Commercial Real Estate [Member] | Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Recorded Investments	1,324	2,319
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Recorded Investments	17,071	14,945
Commercial [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Recorded Investments	8,543	5,404
Commercial [Member] | Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Recorded Investments	8,528	9,541
Residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Recorded Investments	4,917	615
Residential [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Recorded Investments	4,917	615
Residential [Member] | Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Recorded Investments	$ 0	$ 0