Consolidated Statements Of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash Flows From Operating Activities:
Net income	$ 137,995	$ 123,097
Adjustments to reconcile cash provided by operating activities:
Provision for credit losses	22,394	8,218
Depreciation	3,076	3,404
Amortization	4,346	5,298
Loss on retirement of property and equipment	28	64
Provision for deferred income taxes	8,763	12,358
Stock-based compensation	1,556	3,055
Change in operating assets and liabilities:
Increase (decrease) in accounts payable and accrued liabilities	15,951	(2,345)
Decrease (increase) in income taxes receivable	11,503	(3,020)
Increase in income taxes payable	448	0
(Increase) decrease in other assets	(3,703)	527
Net cash provided by operating activities	202,357	150,656
Cash Flows From Investing Activities:
(Increase) decrease in restricted cash and cash equivalents	(24,676)	23,970
Purchases of restricted securities available for sale	(532)	(1,063)
Proceeds from sale of restricted securities available for sale	76	2,112
Maturities of restricted securities available for sale	454	1,256
Principal collected on Loans receivable	748,242	589,727
Advances To Dealer-Partners	(888,602)	(588,869)
Purchases of Consumer Loans	(94,212)	(78,110)
Accelerated payments of Dealer Holdback	(37,275)	(23,784)
Payments of Dealer Holdback	(58,734)	(33,419)
Net decrease in other loans	797	135
Purchases of property and equipment	(3,569)	(1,154)
Net cash used in investing activities	(358,031)	(109,199)
Cash Flows From Financing Activities:
Borrowings under revolving secured line of credit	1,757,500	618,100
Repayments under revolving secured line of credit	(1,794,800)	(612,700)
Proceeds from secured financing	600,000	217,200
Repayments of secured financing	(385,293)	(293,697)
Principal payments under mortgage note and capital lease obligations	(175)	(495)
Proceeds from sale of senior notes	106,000	243,738
Payments of debt issuance costs	(6,849)	(13,536)
Repurchase of common stock	(126,675)	(202,247)
Proceeds from stock options exercised	2,781	1,360
Tax benefits from stock-based compensation plans	3,027	190
Net cash provided by (used in) financing activities	155,516	(42,087)
Effect of exchange rate changes on cash	0	(3)
Net decrease in cash and cash equivalents	(158)	(633)
Cash and cash equivalents, beginning of period	3,792	2,170
Cash and cash equivalents, end of period	3,634	1,537
Supplemental Disclosure of Cash Flow Information:
Cash paid during the period for interest	37,677	31,862
Cash paid during the period for income taxes	$ 55,116	$ 56,467