Allowance for Loan and Lease Loss and Credit Quality (Schedule Of Newly Restructured Loans) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	$ 1,960	$ 106
Commercial real estate
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	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		106
Rate Modifications
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0	0
Rate Modifications | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	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
Term Modifications
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0	0
Term Modifications | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	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
Interest Only Modifications
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0	0
Interest Only Modifications | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	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
Payment Modifications
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0	0
Payment Modifications | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	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
Combination Modifications
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	1,960	106
Combination Modifications | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	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		$ 106