Allowance For Loan Losses (Schedule Of Troubled Debt Restructurings) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($) contract	Sep. 30, 2016 USD ($) contract	Dec. 31, 2016 USD ($)
Financing Receivable, Modifications [Line Items]
Accruing	$ 32,146		$ 29,096
Non-Accruing	47		421
Total	$ 32,193		29,517
Number of Contracts | contract	34	38
Pre-Modification Outstanding Recorded Investment	$ 3,154	$ 5,321
Post Modification Outstanding Recorded Investment	3,154	$ 5,321
Commercial and industrial
Financing Receivable, Modifications [Line Items]
Accruing	31		42
Non-Accruing	0		0
Total	$ 31		42
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	8,427		5,525
Non-Accruing	0		0
Total	$ 8,427		5,525
Number of Contracts | contract	0	1
Pre-Modification Outstanding Recorded Investment	$ 0	$ 2,207
Post Modification Outstanding Recorded Investment	0	$ 2,207
Residential real estate
Financing Receivable, Modifications [Line Items]
Accruing	20,741		20,424
Non-Accruing	47		391
Total	$ 20,788		20,815
Number of Contracts | contract	27	30
Pre-Modification Outstanding Recorded Investment	$ 3,009	$ 2,924
Post Modification Outstanding Recorded Investment	3,009	$ 2,924
Home equity
Financing Receivable, Modifications [Line Items]
Accruing	2,947		3,105
Non-Accruing	0		30
Total	$ 2,947		3,135
Number of Contracts | contract	7	7
Pre-Modification Outstanding Recorded Investment	$ 145	$ 190
Post Modification Outstanding Recorded Investment	145	$ 190
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