Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Allowance for credit losses	$ 89.8	$ 76.4
Stock-based compensation	18.8	14.8
Deferred state net operating loss	5.1	3.9
Other, net	11.3	9.2
Total deferred tax assets	125.0	104.3
Valuation of Loans receivable	364.2	306.5
Deferred Loan origination costs	2.5	2.7
Other, net	7.2	8.5
Total deferred tax liabilities	373.9	317.7
Deferred income taxes, net	$ 248.9	$ 213.4