Allowance For Loan Losses (Schedule Of Credit Quality Indicators) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012
Financing Receivable, Recorded Investment [Line Items]
Total	$ 2,527,445	$ 2,146,369	$ 2,146,369
Commercial, Industrial, And Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,161,610	930,709
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	138,299	108,739	108,739
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,023,311	821,970	821,970
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,056,771	877,307
Pass [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	123,406	105,690
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	933,365	771,617
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	34,021	15,893
Special Mention [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	3,252	878
Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	30,769	15,015
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	69,863	37,509
Substandard [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	11,202	2,171
Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	58,661	35,338
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	955	0
Doubtful [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	439	0
Doubtful [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 516	$ 0