Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash Flows from Operating Activities:
Net Income	$ 43,134	$ 66,517
Adjustments to Reconcile Net Income to Net Cash (Used In) / Provided by Operating Activities:
Provision for Credit Losses - Finance Receivables	240,489	181,840
Provision for Credit Losses - Dealer Finance Receivables	2,003	0
Depreciation Expense	17,734	15,061
Amortization of Debt Issuance Costs and Debt Premium and Discount	4,803	5,965
Non-Cash Compensation Expense—Related Party	930	1,239
Gain from Disposal of Property and Equipment	(4)	(138)
Originations of Finance Receivables	(868,782)	(749,268)
Collections and Recoveries on Finance Receivable Principal Balances	426,982	420,709
Change in Accrued Interest Receivable and Loan Origination Costs	(2,786)	(4,433)
Decrease in Vehicle Inventory	25,989	53,237
Change in Other Assets	6,011	2,599
Increase in Deferred Revenue	14,306	0
Increase in Accounts Payable, Accrued Expenses and Other Liabilities	17,055	34,576
Change in Accrued Expenses-Related Party	(133)	213
Net Cash (Used In) / Provided by Operating Activities	(72,269)	28,117
Cash Flows from Investing Activities:
Originations of Dealer Finance Receivables	(89,273)	(25,602)
Collections and Recoveries of Dealer Finance Receivables, net	22,430	1,970
Proceeds from Disposal of Property and Equipment	1,377	1,521
Purchase of Property and Equipment	(41,090)	(15,807)
Net Cash Used in Investing Activities	(106,556)	(37,918)
Cash Flows from Financing Activities:
Increase in Restricted Cash	(10,546)	(36)
Deposits into Investments Held in Trust	(9,000)	(9,000)
Collections, Buybacks and Change in Investments Held in Trust	4,930	38
Additions to Portfolio Term Financings	543,890	482,246
Repayment of Portfolio Term Financings	(415,352)	(345,481)
Additions to Portfolio Warehouse Facilities	709,400	548,300
Repayment of Portfolio Warehouse Facilities	(712,600)	(630,992)
Additions to Senior Secured Notes Payable	55,500	0
Additions to Other Secured Notes Payable	33,872	42,969
Repayment of Other Secured Notes Payable	(2,189)	(31,375)
Payment of Debt Issuance Costs	(5,659)	(3,206)
Dividend Distributions	(10,855)	(44,790)
Net Cash Provided by Financing Activities	181,391	8,673
Net Increase / (Decrease) in Cash and Cash Equivalents	2,566	(1,128)
Cash and Cash Equivalents at Beginning of Period	26,480	25,930
Cash and Cash Equivalents at End of Period	29,046	24,802
Supplemental Statement of Cash Flows Information:
Interest Paid	48,986	48,621
Interest Paid—Related Party	476	0
Income Taxes Paid	874	1,209
Supplemental Statement of Non-Cash Investing and Financing Activities:
Disposal of Fully Depreciated Property and Equipment	$ 0	$ 2,710