Loans And Allowance For Credit Losses (Summary Of Nonaccrual Loans) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	$ 382,066	$ 306,648
Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	163,499	105,591
Leasing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	247	295
Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	97,609	87,243
Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	1,027	1,056
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	262,382	194,185
Commercial Real Estate Construction Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	22,101	23,880
Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	37,517	25,107
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	59,618	48,987
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	10,337	11,430
One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	48,078	49,861
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	1,301	1,735
Revolving Credit Facility [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	318	196
Consumer Other Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	32	254
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	$ 60,066	$ 63,476