Consolidated Balance Sheets (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Assets
Cash and Cash Equivalents, at Carrying Value	$ 1,289,494	$ 572,297
Loans and Leases Receivable, Net Reported Amount	10,998,274	9,162,492
Restricted Cash and Investments	728,908	919,283
Restricted Cash and Cash Equivalents	14,808	136,556
Property, Plant and Equipment, Net	52,076	47,440
Property Subject to or Available for Operating Lease, Net	1,702,867	809,491
Deferred Tax Assets, Net	107,075	108,684
Goodwill	1,108,278	1,107,982
Intercompany Receivable	66,360	37,447
Other Assets	128,931	141,248
Assets	16,197,071	13,042,920
Liabilities:
Line of Credit Facility, Amount Outstanding	354,203	1,099,391
Securitized Debt Obligation Liability	9,023,308	6,937,841
Senior Notes	1,500,000	500,000
Convertible Senior Notes		500
Accounts Payable And Accrued Expenses	217,938	160,172
Deferred Revenue	69,784	24,987
Taxes Payable	93,462	85,477
Intercompany Taxes Payable	558,622	300,306
Derivative Liabilities	527	11,208
Liabilities	11,817,844	9,119,882
Shareholder's equity:
Additional paid-in capital	3,459,195	3,470,495
Accumulated Other Comprehensive Income (Loss), Net of Tax	(3,254)	(7,617)
Retained earnings	923,286	460,160
Stockholders' Equity Attributable to Parent	4,379,227	3,923,038
Liabilities and Equity	$ 16,197,071	$ 13,042,920
Statement [Line Items]
Entity Common Stock, Shares Outstanding	500	500
Common Stock, Par or Stated Value Per Share	$ 0.0001	$ 0.0001