7. Securitization Trust Debt (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule of Held-to-maturity Securities [Line Items]
Receivables Pledged at September 30, 2012	$ 743,778
Initial Principal	3,060,408
Outstanding Principal	792,497	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
Initial Principal	327,499
Outstanding Principal		52,723
Weighted Average Contractual Interest Rate at September 30, 2012
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	19,916
Initial Principal	310,359
Outstanding Principal	40,713	77,284
Weighted Average Contractual Interest Rate at September 30, 2012	8.85%
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	22,689
Initial Principal	46,058
Outstanding Principal	21,251	36,701
Weighted Average Contractual Interest Rate at September 30, 2012	9.44%
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	51,716
Initial Principal	100,364
Outstanding Principal	48,368	75,625
Weighted Average Contractual Interest Rate at September 30, 2012	3.92%
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	73,998
Initial Principal	109,936
Outstanding Principal	70,863	101,268
Weighted Average Contractual Interest Rate at September 30, 2012	4.59%
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	89,754
Initial Principal	119,400
Outstanding Principal	88,269	119,272
Weighted Average Contractual Interest Rate at September 30, 2012	5.01%
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	107,162
Initial Principal	155,000
Outstanding Principal	105,485
Weighted Average Contractual Interest Rate at September 30, 2012	3.59%
CPS 2012-C [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Sep-19
Receivables Pledged at September 30, 2012	128,323
Initial Principal	141,500
Outstanding Principal	122,329
Weighted Average Contractual Interest Rate at September 30, 2012	3.08%
CPS 2012-B [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Dec-19
Receivables Pledged at September 30, 2012	137,456
Initial Principal	147,000
Outstanding Principal	135,219
Weighted Average Contractual Interest Rate at September 30, 2012	2.39%
CPS 2012-D(3)
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Mar-20
Receivables Pledged at September 30, 2012	112,764
Initial Principal	160,000
Outstanding Principal	$ 160,000
Weighted Average Contractual Interest Rate at September 30, 2012	1.96%