Allowance for Loan and Lease Loss and Credit Quality (Schedule Of Newly Restructured Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	$ 7	$ 0	$ 1,967	$ 106
Commercial real estate
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0		118
Commercial
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs			1,842
Residential
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs			7	106
Rate Modifications
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0		0	0
Rate Modifications | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0		0
Rate Modifications | Commercial
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs			0
Rate Modifications | Residential
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs			0	0
Term Modifications
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0		0	0
Term Modifications | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0		0
Term Modifications | Commercial
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs			0
Term Modifications | Residential
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs			0	0
Interest Only Modifications
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0		0	0
Interest Only Modifications | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0		0
Interest Only Modifications | Commercial
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs			0
Interest Only Modifications | Residential
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs			0	0
Payment Modifications
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0		0	0
Payment Modifications | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0		0
Payment Modifications | Commercial
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs			0
Payment Modifications | Residential
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs			0	0
Combination Modifications
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	7		1,967	106
Combination Modifications | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0		118
Combination Modifications | Commercial
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs			1,842
Combination Modifications | Residential
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs			$ 7	$ 106
Residential Mortgage [Member] | Residential
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	7
Residential Mortgage [Member] | Rate Modifications | Residential
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0
Residential Mortgage [Member] | Term Modifications | Residential
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0
Residential Mortgage [Member] | Interest Only Modifications | Residential
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0
Residential Mortgage [Member] | Payment Modifications | Residential
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0
Residential Mortgage [Member] | Combination Modifications | Residential
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	$ 7