Allowance for Loan and Lease Loss and Credit Quality (Schedule Of Newly Restructured Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	$ 0	$ 14,326	$ 106	$ 28,253
Commercial
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs		9,053		21,846
Residential
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs		187	106	1,321
Rate Modifications
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0	0	0	0
Rate Modifications | Commercial
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs		0		0
Rate Modifications | Residential
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs		0	0	0
Term Modifications
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0	187	0	187
Term Modifications | Commercial
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs		0		0
Term Modifications | Residential
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs		187	0	187
Interest Only Modifications
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0	0	0	0
Interest Only Modifications | Commercial
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs		0		0
Interest Only Modifications | Residential
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs		0	0	0
Payment Modifications
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0	0	0	0
Payment Modifications | Commercial
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs		0		0
Payment Modifications | Residential
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs		0	0	0
Combination Modifications
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	$ 0	14,139	106	28,066
Combination Modifications | Commercial
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs		9,053		21,846
Combination Modifications | Residential
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs		0	$ 106	1,134
Term And Multi Family [Member] | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs		5,086		5,086
Term And Multi Family [Member] | Rate Modifications | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs		0		0
Term And Multi Family [Member] | Term Modifications | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs		0		0
Term And Multi Family [Member] | Interest Only Modifications | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs		0		0
Term And Multi Family [Member] | Payment Modifications | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs		0		0
Term And Multi Family [Member] | Combination Modifications | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs		$ 5,086		$ 5,086