Allowance For Loan Losses (Schedule Of Credit Quality Indicators) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Total	$ 2,577,777	$ 2,606,197
Commercial, Industrial, And Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,142,994	1,205,350
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	149,442	164,484
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	993,552	1,040,866
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,053,413	1,116,186
Pass [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	132,766	158,000
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	920,647	958,186
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	30,414	20,720
Special Mention [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	10,643	648
Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	19,771	20,072
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	58,314	67,555
Substandard [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	5,611	5,416
Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	52,703	62,139
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	853	889
Doubtful [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	422	420
Doubtful [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 431	$ 469