Guarantor Consolidating Financial Statements Guarantor Cash Flow (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net Income (Loss) Attributable to Parent	$ 105,943	$ 112,279
Depreciation, Depletion and Amortization, Nonproduction	92,166	50,565
Amortization of Deferred Loan Origination Fees, Net	(17,902)	(11,087)
Amortization of Finance Receivables Pemium	(5,032)	20,169
Amortization of Debt Discount (Premium)	(4,521)	(9,944)
Provision for Loan and Lease Losses	93,606	48,554
Deferred Income Tax Expense (Benefit)	25,487	(9,652)
Share-based Compensation	1,337	584
Other Noncash Income (Expense)	(300)	(5,556)
Change In Equity In Income Of Affiliates
Increase Decrease In Other Assets	(7,132)	(1,943)
Increase (Decrease) in Accounts Payable and Accrued Liabilities	(8,306)	25,674
Increase (Decrease) in Accrued Taxes Payable	3,676	4,108
Increase or Decrease in Intercompany Taxes Payable	36,184	72,378
Net Cash Provided by (Used in) Operating Activities	315,206	296,129
Payments to Acquire Receivables	1,343,002	1,364,662
Principal Collection and Recoveries on Receivables	1,096,275	1,015,918
Payments To Acquire Commercial Lending Receivable	1,036,138
Principal Collections and Recoveries on Commercial Lending Receivables	763,074
Purchases of Leased Vehicles	510,052	305,370
Proceeds from Termination of Leased Vehicles	37,274	6,922
Payments to Acquire Property, Plant, and Equipment	1,432	3,952
Increase (Decrease) in Restricted Cash and Investments	49,305	(62,710)
Increase (Decrease) in Restricted Cash	38,610	(15,452)
Payments for (Proceeds from) Other Investing Activities	(4,923)	(10,079)
Investment in Affiliates - Net Change
Net Cash Provided by (Used in) Investing Activities	(1,076,993)	(562,903)
Proceeds from Lines of Credit	2,383,928	453,774
Repayments of Lines of Credit	11,253	778,054
Proceeds from Issuance of Financial Services Obligations	1,000,000	1,800,000
Repayments of Financial Services Obligations	989,104	1,168,700
Payments of Debt Issuance Costs	13,167	4,761
Proceeds from Contributions from Parent
Increase (Decrease) Due from Affiliates
Net Cash Provided by (Used in) Financing Activities	2,370,404	302,259
Cash and Cash Equivalents, Period Increase (Decrease)	1,608,617	35,485
Effect of Exchange Rate on Cash and Cash Equivalents	(1,241)	1,009
Cash and Cash Equivalents, at Carrying Value	2,896,870	608,791
Guarantor Subsidiaries [Member]
Net Income (Loss) Attributable to Parent	115,733	117,682
Depreciation, Depletion and Amortization, Nonproduction	411	457
Amortization of Deferred Loan Origination Fees, Net	327	(356)
Amortization of Finance Receivables Pemium	(171)	581
Provision for Loan and Lease Losses	66,513	59,684
Deferred Income Tax Expense (Benefit)	78,107	(21,161)
Other Noncash Income (Expense)	169	219
Change In Equity In Income Of Affiliates	(145,660)	(149,138)
Increase Decrease In Other Assets	(654)	(2,582)
Increase (Decrease) in Accounts Payable and Accrued Liabilities	(1,717)	18,685
Increase (Decrease) in Accrued Taxes Payable	103	(331)
Net Cash Provided by (Used in) Operating Activities	113,161	23,740
Payments to Acquire Receivables	1,343,002	1,364,662
Principal Collection and Recoveries on Receivables	234	206
Proceeds from sale of consumer finance receivables, net	2,114,409
Payments To Acquire Commercial Lending Receivable	1,029,791
Principal Collections and Recoveries on Commercial Lending Receivables	668,758
Proceeds from sale of commercial finance receivables, net	731,994
Payments to Acquire Property, Plant, and Equipment	(75)	1,320
Payments for (Proceeds from) Other Investing Activities	(300)	(16,839)
Investment in Affiliates - Net Change	1,095,350	(444,325)
Net Cash Provided by (Used in) Investing Activities	47,627	131,052
Increase (Decrease) Due from Affiliates	(1,422,169)	117,677
Net Cash Provided by (Used in) Financing Activities	1,422,169	(117,677)
Cash and Cash Equivalents, Period Increase (Decrease)	1,582,957	37,115
Cash and Cash Equivalents, at Carrying Value	2,835,147	537,671
Non-Guarantor Subsidiaries [Member]
Net Income (Loss) Attributable to Parent	143,253	148,597
Depreciation, Depletion and Amortization, Nonproduction	90,872	49,598
Amortization of Deferred Loan Origination Fees, Net	(18,229)	(10,731)
Amortization of Finance Receivables Pemium	(4,861)	19,588
Amortization of Debt Discount (Premium)	(4,521)	(9,944)
Provision for Loan and Lease Losses	27,093	(11,130)
Deferred Income Tax Expense (Benefit)	(52,388)	16,435
Other Noncash Income (Expense)	(469)	(5,775)
Increase Decrease In Other Assets	(5,822)	(626)
Increase (Decrease) in Accounts Payable and Accrued Liabilities	(3,096)	13,470
Increase (Decrease) in Accrued Taxes Payable	2,448	335
Net Cash Provided by (Used in) Operating Activities	174,280	209,817
Payments to Acquire Receivables	2,114,409	1,035,664
Principal Collection and Recoveries on Receivables	1,096,041	1,015,712
Payments To Acquire Commercial Lending Receivable	(738,341)
Principal Collections and Recoveries on Commercial Lending Receivables	94,316
Purchases of Leased Vehicles	510,052	305,370
Proceeds from Termination of Leased Vehicles	37,274	6,922
Payments to Acquire Property, Plant, and Equipment	1,507	2,632
Increase (Decrease) in Restricted Cash and Investments	49,305	(62,710)
Increase (Decrease) in Restricted Cash	38,610	(15,452)
Payments for (Proceeds from) Other Investing Activities	(4,623)	6,760
Net Cash Provided by (Used in) Investing Activities	(2,219,970)	(249,630)
Proceeds from Lines of Credit	2,383,928	453,774
Repayments of Lines of Credit	11,253	778,054
Proceeds from Issuance of Financial Services Obligations	1,000,000	1,800,000
Repayments of Financial Services Obligations	989,104	1,168,700
Payments of Debt Issuance Costs	13,164	4,761
Proceeds from Contributions from Parent	1,101,373	(440,416)
Increase (Decrease) Due from Affiliates	1,400,756	(180,249)
Net Cash Provided by (Used in) Financing Activities	2,071,024	42,092
Cash and Cash Equivalents, Period Increase (Decrease)	25,334	2,279
Effect of Exchange Rate on Cash and Cash Equivalents	(915)	(2,900)
Cash and Cash Equivalents, at Carrying Value	61,723	71,120
Consolidation, Eliminations [Member]
Net Income (Loss) Attributable to Parent	(258,986)	(266,279)
Change In Equity In Income Of Affiliates	258,986	266,279
Net Cash Provided by (Used in) Operating Activities
Payments to Acquire Receivables	(2,114,409)	(1,035,664)
Proceeds from sale of consumer finance receivables, net	(2,114,409)
Payments To Acquire Commercial Lending Receivable	731,994
Proceeds from sale of commercial finance receivables, net	(731,994)
Investment in Affiliates - Net Change	(1,101,428)	439,871
Net Cash Provided by (Used in) Investing Activities	1,101,428	(439,871)
Proceeds from Contributions from Parent	(1,101,373)	440,416
Increase (Decrease) Due from Affiliates	(271)
Net Cash Provided by (Used in) Financing Activities	(1,101,102)	440,416
Cash and Cash Equivalents, Period Increase (Decrease)	326	545
Effect of Exchange Rate on Cash and Cash Equivalents	(326)	(545)
Parent Company [Member]
Net Income (Loss) Attributable to Parent	105,943	112,279
Depreciation, Depletion and Amortization, Nonproduction	883	510
Amortization of Debt Discount (Premium)
Deferred Income Tax Expense (Benefit)	(232)	(4,926)
Share-based Compensation	1,337	584
Change In Equity In Income Of Affiliates	(113,326)	(117,141)
Increase Decrease In Other Assets	(656)	1,265
Increase (Decrease) in Accounts Payable and Accrued Liabilities	(3,493)	(6,481)
Increase (Decrease) in Accrued Taxes Payable	1,125	4,104
Increase or Decrease in Intercompany Taxes Payable	36,184	72,378
Net Cash Provided by (Used in) Operating Activities	27,765	62,572
Payments to Acquire Property, Plant, and Equipment
Payments for (Proceeds from) Other Investing Activities
Investment in Affiliates - Net Change		4,454
Net Cash Provided by (Used in) Investing Activities	(6,078)	(4,454)
Payments of Debt Issuance Costs	3
Increase (Decrease) Due from Affiliates	21,684	62,572
Net Cash Provided by (Used in) Financing Activities	(21,687)	(62,572)
Cash and Cash Equivalents, Period Increase (Decrease)		(4,454)
Effect of Exchange Rate on Cash and Cash Equivalents		$ 4,454