Asset-Backed Financing (Schedule Of Assets And Liabilities Of Variable Interest Entities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Aug. 06, 2010
Asset-Backed Financing [Line Items]
Finance receivables		$ 2,929,674
Allowance for credit losses		(66,037)
Restricted cash	188,008	229,655
Other Assets		7,221	14,300
Total assets		3,100,513
Secured Debt		2,087,346
Asset-backed Canadian Commercial Paper Conduit Facility [Member]
Asset-Backed Financing [Line Items]
Secured Debt	175,658	0
Asset-backed Securities [Member]
Asset-Backed Financing [Line Items]
Finance receivables	2,337,993
Allowance for credit losses	(45,571)
Restricted cash	188,008
Other Assets	5,543
Total assets	2,485,973
Secured Debt	1,623,434
SPEs [Member]
Asset-Backed Financing [Line Items]
Restricted cash	176,290	229,655
SPEs [Member] | Asset-backed U.S. Commercial Paper Conduit Facility [Member]
Asset-Backed Financing [Line Items]
Finance receivables	0	13,455
Allowance for credit losses	0	(302)
Restricted cash	0	879
Other Assets	419	449
Total assets	419	14,481
Secured Debt	0	0
SPEs [Member] | Asset-backed Securities [Member]
Asset-Backed Financing [Line Items]
Finance receivables	2,143,708	2,916,219
Allowance for credit losses	(42,139)	(65,735)
Restricted cash	176,290	228,776
Other Assets	4,869	6,772
Total assets	2,282,728	3,086,032
Secured Debt	1,447,776	2,087,346
Variable Interest Entity, Not Primary Beneficiary [Member] | Asset-backed Canadian Commercial Paper Conduit Facility [Member]
Asset-Backed Financing [Line Items]
Finance receivables	194,285	0
Allowance for credit losses	(3,432)	0
Restricted cash	11,718	0
Other Assets	255	0
Total assets	202,826	0
Secured Debt	$ 175,658	$ 0