Allowance For Loan Losses (Schedule Of Credit Quality Indicators) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Total	$ 2,630,742	$ 2,606,197
Commercial, Industrial, And Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,165,055	1,205,350
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	130,462	148,302
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,034,593	1,057,048
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,084,079	1,116,186
Pass [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	116,498	141,818
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	967,581	974,368
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	19,788	20,720
Special Mention [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	654	648
Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	19,134	20,072
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	60,343	67,555
Substandard [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	12,900	5,416
Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	47,443	62,139
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	845	889
Doubtful [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	410	420
Doubtful [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 435	$ 469