Loans Receivable (Summary Of Changes In Accretable Yield) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	$ 701,186		$ 586,039		$ 628,128		$ 476,089
New Consumer Loan assignments	138,518	[1]	136,135	[1]	454,386	[1]	441,738	[1]
Finance charge income	(137,495)		(117,905)		(397,563)		(338,238)
Forecast changes	8,145		8,002		22,728		30,099
Transfers	1,660	[2]	833	[2]	4,335	[2]	3,416	[2]
Balance, end of period	712,014		613,104		712,014		613,104
Dealer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	581,693		462,478		508,046		351,569
New Consumer Loan assignments	127,728	[1]	122,010	[1]	416,159	[1]	395,111	[1]
Finance charge income	(117,780)		(96,577)		(337,231)		(273,300)
Forecast changes	6,880		5,211		16,322		23,440
Transfers	(2,580)	[2]	(1,349)	[2]	(7,355)	[2]	(5,047)	[2]
Balance, end of period	595,941		491,773		595,941		491,773
Purchased Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	119,493		123,561		120,082		124,520
New Consumer Loan assignments	10,790	[1]	14,125	[1]	38,227	[1]	46,627	[1]
Finance charge income	(19,715)		(21,328)		(60,332)		(64,938)
Forecast changes	1,265		2,791		6,406		6,659
Transfers	4,240	[2]	2,182	[2]	11,690	[2]	8,463	[2]
Balance, end of period	$ 116,073		$ 121,331		$ 116,073		$ 121,331

[1] The Dealer Loans amount represents the net cash flows expected at the time of assignment on Consumer Loans assigned under our Portfolio Program, less the related advances paid to Dealers.  The Purchased Loans amount represents the net cash flows expected at the time of assignment on Consumer Loans assigned under our Purchase Program, less the related one-time payments made to Dealers.

[2] Under our Portfolio Program, certain events may result in Dealers forfeiting their rights to Dealer Holdback.  We transfer the Dealer’s outstanding Dealer Loan balance to Purchased Loans in the period this forfeiture occurs.