Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended		3 Months Ended	12 Months Ended
	Sep. 30, 2010 Predecessor [Member]	Jun. 30, 2010 Predecessor [Member]	Jun. 30, 2010 Predecessor [Member] Consumer Loans Auto Financing Receivable [Member]	Dec. 31, 2010 Successor [Member]	Dec. 31, 2012 Successor [Member]	Dec. 31, 2011 Successor [Member]	Dec. 31, 2012 Successor [Member] Commercial Loan [Member]	Dec. 31, 2012 Successor [Member] Consumer Loans Auto Financing Receivable [Member]	Dec. 31, 2011 Successor [Member] Consumer Loans Auto Financing Receivable [Member]
Net income	$ 51,300	$ 220,546		$ 74,633	$ 463,126	$ 385,527
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, Depletion and Amortization, Nonproduction	14,649	79,044		7,809	255,182	109,619
Provision for Loan and Lease Losses	74,618	388,058		26,352	303,692	178,372
Deferred Income Tax Expense (Benefit)	452	(24,567)		21,367	2,626	50,236
Stock-based compensation expense	5,019	15,115			3,716	17,106
Amortization of Finance Receivables Pemium				77,092	(10,419)	177,566
Amortization of Debt Discount (Premium)				(27,458)	(31,648)	(67,671)
Amortization Of Warrant Costs		1,968
Non-cash interest charges on convertible debt	5,625	21,554
Amortization of Deferred Loan Origination Fees, Net	(942)	4,791		1,111	(53,189)	(20,702)
Other Noncash Income (Expense)	(13,800)	(16,237)		(11,539)	(11,209)	(23,218)
Changes in assets and liabilities:
Increase Decrease In Other Assets	16,373	202,658		(369)	2,378	34,649
Increase (Decrease) in Accounts Payable and Accrued Liabilities	(9,957)	26,245		(10,275)	47,946	(21,399)
Increase (Decrease) in Accrued Taxes Payable	1,405	9,534		(9,448)	7,816	(77,285)
Increase or Decrease in Intercompany Taxes Payable				42,214	258,316	258,092
Net Cash Provided by (Used in) Operating Activities	144,742	928,709		191,489	1,238,333	1,000,892
Cash flows from investing activities:
Payments to Acquire Receivables			(2,090,602)				(1,224,082)	(5,556,169)	(5,020,639)
Principal Collection and Recoveries on Receivables			3,606,680				667,181	4,006,893	3,719,264
Payments to Acquire Property, Plant, and Equipment	312	1,581		2,429	13,489	8,359
Increase (Decrease) in Restricted Cash and Investments	45,787	78,549		(49,860)	(190,375)	(6,799)
Increase (Decrease) in Restricted Cash	(8,257)	(52,354)		(3,030)	(122,345)	5,108
Payments for (Proceeds from) Other Investing Activities	(40,193)	(53,922)		(13,236)	10,911	12,602
Purchases of Leased Vehicles				(10,655)	(1,077,163)	(857,138)
Proceeds from Leases Held-for-investment					55,414	38,054
Payments to Acquire Businesses, Gross						(9,601)
Cash Acquired from Acquisition						9,283
Net Cash Provided by (Used in) Investing Activities	(54,605)	1,542,224		(23,414)	(2,839,606)	(2,140,047)
Cash flows from financing activities:
Proceeds from Lines of Credit	484,921	775,665		468,394	1,199,707	3,716,609
Repayments of Lines of Credit	(552,951)	(1,806,852)		(256,362)	(1,950,484)	(3,446,074)
Proceeds from Issuance of Financial Services Obligations	1,050,000	2,352,493		700,000	6,400,000	4,550,000
Repayments of Financial Services Obligations	(795,512)	(3,674,062)		(954,644)	(4,282,977)	(3,675,459)
Proceeds from Issuance of Senior Long-term Debt					1,000,000	500,000
Payments of Debt Issuance Costs	7,686	24,754		4,314	48,201	49,318
Proceeds from Issuance of Common Stock	2,138	15,635
Employee Service Share-based Compensation, Cash Flow Effect, Cash Used to Settle Awards	(16,062)
Extinguishment of Debt, Amount		(20,425)		(464,254)	(505)	(75,164)
Other net changes	313	645			(285)	(528)
Net Cash Provided by (Used in) Financing Activities	165,161	(2,381,655)		(511,180)	2,317,255	1,520,066
Cash and Cash Equivalents, Period Increase (Decrease)	255,298	89,278		(343,105)	715,982	380,911
Effect of Exchange Rate on Cash and Cash Equivalents	(42)	(292)		130	1,215	(3,168)
Cash and cash equivalents at beginning of period		282,273		537,529	572,297	194,554
Cash and cash equivalents at end of period	$ 537,529			$ 194,554	$ 1,289,494	$ 572,297