Allowance for Loan and Lease Loss and Credit Quality (Schedule Of Troubled Debt Restructuring By Accrual versus Non-Accrual Status) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	$ 46,955	$ 66,696
Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	35,706	54,836
Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	11,249	11,860
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	24,841	51,136
Commercial Real Estate [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	23,467	48,817
Commercial Real Estate [Member] | Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	1,374	2,319
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	18,506	14,945
Commercial [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	8,631	5,404
Commercial [Member] | Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	9,875	9,541
Residential [Member]
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	3,608	615
Residential [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	3,608	615
Residential [Member] | Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	$ 0	$ 0