Allowance For Loan Losses (Schedule Of Credit Quality Indicators) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Total	$ 2,696,438	$ 2,652,066
Commercial, Industrial, And Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,153,598	1,169,379
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	124,495	140,548
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,029,103	1,028,831
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,083,773	1,099,397
Pass [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	111,706	128,812
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	972,067	970,585
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	26,113	15,864
Special Mention [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	4,814	761
Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	21,299	15,103
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	43,671	53,266
Substandard [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	7,934	10,575
Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	35,737	42,691
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	41	852
Doubtful [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	41	400
Doubtful [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 0	$ 452