Finance Receivables Troubled Debt Restructurings (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Commercial Loan [Member]	Sep. 30, 2012 Commercial Loan [Member]	Jun. 30, 2012 Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings - Number of Loans Entering a Modification Program	4,148	6,857
Financing Receivable, Gross				$ 284,413	$ 284,413	$ 127,560
Finance Receivables Purchased				410,344	584,140
Principal Collection and Recoveries on Receivables		3,049,533	2,816,607	(253,491)	(299,727)
Troubled Debt Restructurings - Subsequent Default	927	1,146
Troubled Debt Restructurings - Amount of Loans That Entered a Loan Modification Program	77,323	129,272
Impaired Financing Receivable, Average Recorded Investment	91,462	69,888
Financing Receivable, Modifications, Recorded Investment	127,633	127,633
Allowance Related to Finance Receivable Modifications	(21,981)	(21,981)
Financing Receivable, Modifications, Post-Modification Recorded Investment	105,652	105,652
Impaired Financing Receivable, Unpaid Principal Balance	130,001	130,001
Loans and Leases Receivable, Impaired, Troubled Debt, Interest Income Earne	$ 3,275	$ 4,453