Loans And Allowance For Credit Losses (Summary Of Nonaccrual Loans) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	$ 471,539	$ 648,153
Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	100,188	90,859
Leasing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	796	838
Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	157,609	206,031
Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	10,006	9,234
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	268,599	306,962
Commercial Real Estate Construction Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	65,320	107,658
Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	60,378	124,615
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	125,698	232,273
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	8,425	14,247
One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	57,658	70,180
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	4,080	4,560
Revolving Credit Facility [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	1,186	1,190
Consumer Other Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	1,149	1,398
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	72,498	91,575
Fdic Supported Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	$ 4,744	$ 17,343