Allowance For Loan Losses (Schedule Of Credit Quality Indicators) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Total	$ 2,557,035	$ 2,606,197
Commercial, Industrial, And Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,154,000	1,205,350
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	144,108	164,484
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,009,892	1,040,866
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,066,820	1,116,186
Pass [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	137,353	158,000
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	929,467	958,186
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	24,122	20,720
Special Mention [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,118	648
Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	23,004	20,072
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	62,199	67,555
Substandard [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	5,223	5,416
Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	56,976	62,139
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	859	889
Doubtful [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	414	420
Doubtful [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 445	$ 469