Allowance For Loan Losses (Schedule Of Credit Quality Indicators) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Total	$ 2,632,471	$ 2,652,066
Commercial, Industrial, And Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,143,904	1,169,379
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	124,342	132,641
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,019,562	1,036,738
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,070,117	1,099,397
Pass [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	112,978	120,905
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	957,139	978,492
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	26,015	15,864
Special Mention [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	980	761
Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	25,035	15,103
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	47,727	53,266
Substandard [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	10,384	10,575
Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	37,343	42,691
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	45	852
Doubtful [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	0	400
Doubtful [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 45	$ 452