4. Securitization Trust Debt (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Schedule of Held-to-maturity Securities [Line Items]
Receivables Pledged at September 30, 2012	$ 668,009
Initial Principal	2,863,524
Outstanding Principal	721,396	583,065
CPS 2006-B [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Jan-13
Receivables Pledged at September 30, 2012
Initial Principal	257,500
Outstanding Principal		6,604
Weighted Average Contractual Interest Rate at September 30, 2012
CPS 2006-C [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Jun-13
Receivables Pledged at September 30, 2012
Initial Principal	247,500
Outstanding Principal		14,873
Weighted Average Contractual Interest Rate at September 30, 2012
CPS 2006-D [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Aug-13
Receivables Pledged at September 30, 2012
Initial Principal	220,000
Outstanding Principal		15,716
Weighted Average Contractual Interest Rate at September 30, 2012
CPS 2007-A [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Nov-13
Receivables Pledged at September 30, 2012
Initial Principal	290,000
Outstanding Principal		34,312
Weighted Average Contractual Interest Rate at September 30, 2012
CPS 2007-TFC [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Dec-13
Receivables Pledged at September 30, 2012
Initial Principal	113,293
Outstanding Principal		7,771
Weighted Average Contractual Interest Rate at September 30, 2012
CPS 2007-B [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Jan-14
Receivables Pledged at September 30, 2012
Initial Principal	314,999
Outstanding Principal		40,916
Weighted Average Contractual Interest Rate at September 30, 2012
CPS 2007-C [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	May-14
Receivables Pledged at September 30, 2012	18,323
Initial Principal	327,499
Outstanding Principal	26,803	52,723
Weighted Average Contractual Interest Rate at September 30, 2012	7.31%
CPS 2008-A [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Oct-14
Receivables Pledged at September 30, 2012	26,428
Initial Principal	310,359
Outstanding Principal	46,611	77,284
Weighted Average Contractual Interest Rate at September 30, 2012	8.68%
Page Five Funding [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Jan-18
Receivables Pledged at September 30, 2012	25,779
Initial Principal	9,174
Outstanding Principal	24,582	36,701
Weighted Average Contractual Interest Rate at September 30, 2012	9.45%
CPS 2011-A [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Apr-18
Receivables Pledged at September 30, 2012	58,355
Initial Principal	100,364
Outstanding Principal	55,229	75,625
Weighted Average Contractual Interest Rate at September 30, 2012	4.02%
CPS 2011-B [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Sep-18
Receivables Pledged at September 30, 2012	81,551
Initial Principal	109,936
Outstanding Principal	76,863	101,268
Weighted Average Contractual Interest Rate at September 30, 2012	4.54%
CPS 2011-C [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Mar-19
Receivables Pledged at September 30, 2012	98,417
Initial Principal	119,400
Outstanding Principal	94,798	119,272
Weighted Average Contractual Interest Rate at September 30, 2012	4.97%
CPS 2012-A [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Jun-19
Receivables Pledged at September 30, 2012	120,572
Initial Principal	155,000
Outstanding Principal	116,809
Weighted Average Contractual Interest Rate at September 30, 2012	3.51%
CPS 2012-B [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Sep-19
Receivables Pledged at September 30, 2012	135,415
Initial Principal	141,500
Outstanding Principal	132,701
Weighted Average Contractual Interest Rate at September 30, 2012	3.04%
CPS 2012-C [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Dec-19
Receivables Pledged at September 30, 2012	103,169
Initial Principal	147,000
Outstanding Principal	$ 147,000
Weighted Average Contractual Interest Rate at September 30, 2012	2.34%