Loans And Allowance For Credit Losses (Summary Of Nonaccrual Loans) (Details) - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	[1]	$ 392,322	$ 217,427
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		6,152	7,045
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		202	186
Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		356,034	163,906
Finance Leases Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		14,107	3,829
Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		74,369	73,881
Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		926	951
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		445,436	242,567
Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		33,051	40,253
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		39,203	47,298
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		10,700	8,270
One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		43,791	50,254
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		645	748
Revolving Credit Facility [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		1,791	537
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		57,129	59,995
Financing Receivables, Total [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total		$ 541,768	$ 349,860

[1] 1 Represents nonaccrual loans that are not past due more than 30 days; however, full payment of principal and interest is still not expected.