Loans Receivable (Summary Of Changes In Loans Receivable) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	$ 1,897,169		$ 1,488,356		$ 1,752,891		$ 1,344,881
New Consumer Loan assignments	326,919	[1]	304,568	[1]	736,100	[1]	673,702	[1]
Principal collected on Loans receivable	(286,803)		(240,820)		(597,598)		(494,412)
Accelerated Dealer Holdback payments	11,309		12,371		24,223		24,416
Dealer Holdback payments	29,411		19,175		62,616		34,749
Write-offs	(748)		(537)		(1,509)		(966)
Recoveries	570	[2]	560	[2]	1,139	[2]	1,073	[2]
Net change in other loans	(33)		(768)		(68)		(538)
Balance, end of period	1,977,794		1,582,905		1,977,794		1,582,905
Dealer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	1,652,065		1,233,387		1,506,539		1,082,039
New Consumer Loan assignments	300,954	[1]	273,799	[1]	675,346	[1]	610,207	[1]
Principal collected on Loans receivable	(252,313)		(203,087)		(521,963)		(411,546)
Accelerated Dealer Holdback payments	11,309		12,371		24,223		24,416
Dealer Holdback payments	29,411		19,175		62,616		34,749
Transfers	(5,025)	[3]	(2,961)	[3]	(10,204)	[3]	(7,557)	[3]
Write-offs	(340)		(476)		(1,003)		(827)
Recoveries	550	[2]	533	[2]	1,092	[2]	1,030	[2]
Net change in other loans	(33)		(768)		(68)		(538)
Balance, end of period	1,736,578		1,331,973		1,736,578		1,331,973
Purchased Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	245,104		254,969		246,352		262,842
New Consumer Loan assignments	25,965	[1]	30,769	[1]	60,754	[1]	63,495	[1]
Principal collected on Loans receivable	(34,490)		(37,733)		(75,635)		(82,866)
Transfers	5,025	[3]	2,961	[3]	10,204	[3]	7,557	[3]
Write-offs	(408)		(61)		(506)		(139)
Recoveries	20	[2]	27	[2]	47	[2]	43	[2]
Balance, end of period	$ 241,216		$ 250,932		$ 241,216		$ 250,932

[1] The Dealer Loans amount represents advances paid to Dealers on Consumer Loans assigned under our Portfolio Program.  The Purchased Loans amount represents one-time payments made to Dealers to purchase Consumer Loans assigned under our Purchase Program.

[2] Represents collections received on previously written off Loans.

[3] Under our Portfolio Program, certain events may result in Dealers forfeiting their rights to Dealer Holdback.  We transfer the Dealer’s outstanding Dealer Loan balance to Purchased Loans in the period this forfeiture occurs.