Allowance for Loan and Lease Loss and Credit Quality (Schedule Of Troubled Debt Restructuring By Accrual versus Non-Accrual Status) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Accrual Status
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	$ 15,267	$ 13,924
Non-Accrual Status
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	6,759	18,026
Total TDR Modification
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	22,026	31,950
Commercial real estate | Accrual Status
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	4,036	4,524
Commercial real estate | Non-Accrual Status
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	6,666	9,290
Commercial real estate | Total TDR Modification
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	10,702	13,814
Commercial | Accrual Status
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	5,752	3,696
Commercial | Non-Accrual Status
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	93	8,736
Commercial | Total TDR Modification
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	5,845	12,432
Residential | Accrual Status
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	5,479	5,704
Residential | Non-Accrual Status
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	0	0
Residential | Total TDR Modification
Financing Receivable, Modifications [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	$ 5,479	$ 5,704