Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Abstract]
Allowance for credit losses	$ 64.2	$ 56.3
Stock-based compensation	10.0	5.9
Deferred state net operating loss	1.9	2.7
Other, net	6.6	4.9
Total deferred tax assets	82.7	69.8
Valuation of Loans receivable	220.5	184.4
Deferred Loan origination costs	3.7	3.4
Other, net	6.9	5.4
Total deferred tax liabilities	231.1	193.2
Net deferred tax liabilities	$ 148.4	$ 123.4