Guarantor Consolidating Financial Statements Guarantor Income Statements (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Guarantor [Line Items]
Financial Services Revenue	$ 414,731	$ 358,256
Operating Leases, Income Statement, Lease Revenue	106,705	52,893
Other Income	18,684	20,254
Equity In Income Of Affiliates
Revenues	540,120	431,403
Operating Expenses	107,824	97,869
Operating Leases, Income Statement, Depreciation Expense on Property Subject to or Held-for-lease	80,407	40,646
Provision for Loan and Lease Losses	93,606	48,554
Interest Expense	82,228	63,092
Acquisition Costs, Period Cost	6,383
Costs and Expenses	370,448	250,161
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	169,672	181,242
Income Tax Expense (Benefit)	63,729	68,963
Net Income (Loss) Attributable to Parent	105,943	112,279
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	99,865	116,188
Parent Company [Member]
Guarantor [Line Items]
Other Income	14,083	10,942
Equity In Income Of Affiliates	113,326	117,141
Revenues	127,409	128,083
Operating Expenses	3,189	3,594
Interest Expense	21,739	14,324
Costs and Expenses	24,928	17,918
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	102,481	110,165
Income Tax Expense (Benefit)	(3,462)	(2,114)
Net Income (Loss) Attributable to Parent	105,943	112,279
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	99,865	116,733
Guarantor Subsidiaries [Member]
Guarantor [Line Items]
Financial Services Revenue	38,644	35,111
Other Income	41,538	63,203
Equity In Income Of Affiliates	145,660	149,138
Revenues	225,842	247,452
Operating Expenses	22,820	25,374
Operating Leases, Income Statement, Depreciation Expense on Property Subject to or Held-for-lease
Provision for Loan and Lease Losses	66,513	59,684
Interest Expense	34,819	58,452
Costs and Expenses	124,152	143,510
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	101,690	103,942
Income Tax Expense (Benefit)	(14,043)	(13,740)
Net Income (Loss) Attributable to Parent	115,733	117,682
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	115,733	117,682
Non-Guarantor Subsidiaries [Member]
Guarantor [Line Items]
Financial Services Revenue	376,087	323,145
Operating Leases, Income Statement, Lease Revenue	106,705	52,893
Other Income	47,025	88,781
Revenues	529,817	464,819
Operating Expenses	81,815	68,901
Operating Leases, Income Statement, Depreciation Expense on Property Subject to or Held-for-lease	80,407	40,646
Provision for Loan and Lease Losses	27,093	(11,130)
Interest Expense	109,632	132,988
Acquisition Costs, Period Cost	6,383
Costs and Expenses	305,330	231,405
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	224,487	233,414
Income Tax Expense (Benefit)	81,234	84,817
Net Income (Loss) Attributable to Parent	143,253	148,597
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	137,225	148,052
Consolidation, Eliminations [Member]
Guarantor [Line Items]
Other Income	(83,962)	(142,672)
Equity In Income Of Affiliates	(258,986)	(266,279)
Revenues	(342,948)	(408,951)
Interest Expense	(83,962)	(142,672)
Costs and Expenses	(83,962)	(142,672)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	(258,986)	(266,279)
Net Income (Loss) Attributable to Parent	(258,986)	(266,279)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ (252,958)	$ (266,279)