Allowance for Loan and Lease Loss and Credit Quality (Schedule Of Newly Restructured Loans) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	$ 28,577	$ 22,752
Commercial Real Estate | Term And Multi Family
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	5,086	15,193
Commercial | Term, net
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	21,846	4,600
Residential | Mortgage
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	1,645	2,882
Consumer & Other, Net
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs		77
Rate Modifications
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0	0
Rate Modifications | Commercial Real Estate | Term And Multi Family
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0	0
Rate Modifications | Commercial | Term, net
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0	0
Rate Modifications | Residential | Mortgage
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0	0
Rate Modifications | Consumer & Other, Net
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	187	0
Term Modifications | Commercial Real Estate | Term And Multi Family
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0	0
Term Modifications | Commercial | Term, net
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0	0
Term Modifications | Residential | Mortgage
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	187	0
Term Modifications | Consumer & Other, Net
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 | Term And Multi Family
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0	0
Interest Only Modifications | Commercial | Term, net
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0	0
Interest Only Modifications | Residential | Mortgage
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0	0
Interest Only Modifications | Consumer & Other, Net
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 | Term And Multi Family
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0	0
Payment Modifications | Commercial | Term, net
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0	0
Payment Modifications | Residential | Mortgage
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	0	0
Payment Modifications | Consumer & Other, Net
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	28,390	22,752
Combination Modifications | Commercial Real Estate | Term And Multi Family
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	5,086	15,193
Combination Modifications | Commercial | Term, net
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	21,846	4,600
Combination Modifications | Residential | Mortgage
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs	$ 1,458	2,882
Combination Modifications | Consumer & Other, Net
Financing Receivable, Modifications [Line Items]
Total restructured loans, net of deferred fees and costs		$ 77