Consumer Loans, Credit Quality Information And Allowances And Liabilities For Estimated Losses On Consumer Loans (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 D	Dec. 31, 2012	Mar. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrual for losses on consumer loan guaranty obligations	$ 2.1	$ 3.5	$ 2.0
Active consumer loans owned by third-party lenders	$ 43.9	$ 64.7	$ 44.5
Days for delinquent loans to be charged off	60
Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Delinquent loans expiry period (in days)	1
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Delinquent loans expiry period (in days)	59
Short Term Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Guaranteed Loans Term Available	90
Secured Auto Equity Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Guaranteed Loans Term Average	24
Guaranteed Loans Term Available	42