Loans Receivable (Summary Of Changes In Loans Receivable) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	$ 1,977,794		$ 1,582,905		$ 1,752,891		$ 1,344,881
New Consumer Loan assignments	318,617	[1]	309,112	[1]	1,054,717	[1]	982,814	[1]
Principal collected on Loans receivable	(285,015)		(253,830)		(882,613)		(748,242)
Accelerated Dealer Holdback payments	9,884		12,859		34,107		37,275
Dealer Holdback payments	27,118		23,985		89,734		58,734
Transfers	0	[2]	0	[2]	0	[2]	0	[2]
Write-offs	(1,506)		(804)		(3,015)		(1,770)
Recoveries	605	[3]	463	[3]	1,744	[3]	1,536	[3]
Net change in other loans	(16)		(259)		(84)		(797)
Balance, end of period	2,047,481		1,674,431		2,047,481		1,674,431
Dealer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	1,736,578		1,331,973		1,506,539		1,082,039
New Consumer Loan assignments	293,379	[1]	278,395	[1]	968,725	[1]	888,602	[1]
Principal collected on Loans receivable	(252,398)		(216,860)		(774,361)		(628,406)
Accelerated Dealer Holdback payments	9,884		12,859		34,107		37,275
Dealer Holdback payments	27,118		23,985		89,734		58,734
Transfers	(5,946)	[2]	(2,933)	[2]	(16,150)	[2]	(10,490)	[2]
Write-offs	(1,480)		(736)		(2,483)		(1,563)
Recoveries	582	[3]	442	[3]	1,674	[3]	1,472	[3]
Net change in other loans	(16)		(259)		(84)		(797)
Balance, end of period	1,807,701		1,426,866		1,807,701		1,426,866
Purchased Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	241,216		250,932		246,352		262,842
New Consumer Loan assignments	25,238	[1]	30,717	[1]	85,992	[1]	94,212	[1]
Principal collected on Loans receivable	(32,617)		(36,970)		(108,252)		(119,836)
Accelerated Dealer Holdback payments	0		0		0		0
Dealer Holdback payments	0		0		0		0
Transfers	5,946	[2]	2,933	[2]	16,150	[2]	10,490	[2]
Write-offs	(26)		(68)		(532)		(207)
Recoveries	23	[3]	21	[3]	70	[3]	64	[3]
Net change in other loans	0		0		0		0
Balance, end of period	$ 239,780		$ 247,565		$ 239,780		$ 247,565

[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] 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.

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