Allowance For Loan Losses (Schedule Of Troubled Debt Restructurings) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) contract	Mar. 31, 2018 USD ($) contract	Dec. 31, 2018 USD ($)
Financing Receivable, Modifications [Line Items]
Accruing	$ 34,283		$ 34,191
Non-Accruing	469		663
Total	$ 34,752		34,854
Number of Contracts | contract	28	11
Pre-Modification Outstanding Recorded Investment	$ 1,798	$ 489
Post Modification Outstanding Recorded Investment	1,798	$ 489
Commercial and industrial
Financing Receivable, Modifications [Line Items]
Accruing	89		98
Non-Accruing	0		0
Total	$ 89		98
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	8,164		8,205
Non-Accruing	0		0
Total	$ 8,164		8,205
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	23,017		22,863
Non-Accruing	464		658
Total	$ 23,481		23,521
Number of Contracts | contract	23	7
Pre-Modification Outstanding Recorded Investment	$ 1,729	$ 412
Post Modification Outstanding Recorded Investment	1,729	$ 412
Home equity
Financing Receivable, Modifications [Line Items]
Accruing	3,013		3,025
Non-Accruing	5		5
Total	$ 3,018		3,030
Number of Contracts | contract	5	4
Pre-Modification Outstanding Recorded Investment	$ 69	$ 77
Post Modification Outstanding Recorded Investment	69	$ 77
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