Allowance For Loan Losses (Schedule Of Troubled Debt Restructurings) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($) contract	Jun. 30, 2017 USD ($) contract	Dec. 31, 2017 USD ($)
Financing Receivable, Modifications [Line Items]
Accruing	$ 31,978		$ 32,568
Non-Accruing	347		134
Total	$ 32,325		32,702
Number of Contracts | contract	26	24
Pre-Modification Outstanding Recorded Investment	$ 1,222	$ 2,747
Post Modification Outstanding Recorded Investment	1,222	$ 2,747
Commercial and industrial
Financing Receivable, Modifications [Line Items]
Accruing	119		135
Non-Accruing	0		0
Total	$ 119		135
Number of Contracts | contract	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Post Modification Outstanding Recorded Investment	0	$ 0
Commercial real estate
Financing Receivable, Modifications [Line Items]
Accruing	8,279		8,381
Non-Accruing	0		0
Total	$ 8,279		8,381
Number of Contracts | contract	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Post Modification Outstanding Recorded Investment	0	$ 0
Residential real estate
Financing Receivable, Modifications [Line Items]
Accruing	20,424		21,005
Non-Accruing	307		84
Total	$ 20,731		21,089
Number of Contracts | contract	17	19
Pre-Modification Outstanding Recorded Investment	$ 1,028	$ 2,593
Post Modification Outstanding Recorded Investment	1,028	$ 2,593
Home equity
Financing Receivable, Modifications [Line Items]
Accruing	3,156		3,047
Non-Accruing	40		50
Total	$ 3,196		3,097
Number of Contracts | contract	9	5
Pre-Modification Outstanding Recorded Investment	$ 194	$ 154
Post Modification Outstanding Recorded Investment	194	$ 154
Consumer
Financing Receivable, Modifications [Line Items]
Accruing	0		0
Non-Accruing	0		0
Total	$ 0		$ 0
Number of Contracts | contract	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Post Modification Outstanding Recorded Investment	$ 0	$ 0