Finance Receivables Allowance for Loan Losses (Details) (Consumer Loans Auto Financing Receivable [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended		3 Months Ended	12 Months Ended
	Dec. 31, 2010 Successor [Member]	Dec. 31, 2012 Successor [Member]	Dec. 31, 2011 Successor [Member]	Sep. 30, 2010 Predecessor [Member]	Jun. 30, 2010 Predecessor [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses		$ 178,768	$ 26,352	$ 573,310	$ 890,640
Financing Receivable, Allowance for Credit Losses, Provisions	26,352	297,589	178,372	74,618	388,058
Financing Receivable, Allowance for Credit Losses, Charge-offs		(304,293)	(66,080)	(217,520)	(1,249,298)
Financing Receivable, Allowance for Credit Losses, Recoveries		172,676	40,124	98,081	543,910
Financing Receivable, Allowance for Credit Losses	$ 26,352	$ 344,740	$ 178,768	$ 528,489	$ 573,310