Allowance For Loan Losses (Schedule Of Credit Quality Indicators) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Total	$ 2,558,456	$ 2,146,369
Commercial, Industrial, And Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,173,463	930,709
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	151,185	108,739
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,022,278	821,970
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,080,941	877,307
Pass [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	140,999	105,690
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	939,942	771,617
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	23,816	15,893
Special Mention [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	693	878
Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	23,123	15,015
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	67,777	37,509
Substandard [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	9,057	2,171
Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	58,720	35,338
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	929	0
Doubtful [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	436	0
Doubtful [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 493	$ 0