4. Securitization Trust Debt (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Schedule of Held-to-maturity Securities [Line Items]
Receivables Pledged at end of period	$ 1,054,517
Initial Principal	1,884,617
Outstanding Principal	1,094,559	792,497
CPS 2008-A [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date	Oct-14
Receivables Pledged at end of period
Initial Principal	310,359
Outstanding Principal		40,713
Weighted Average Contractual Interest Rate
Page Five Funding [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date	Jan-18
Receivables Pledged at end of period	13,244
Initial Principal	46,058
Outstanding Principal	11,500	21,251
Weighted Average Contractual Interest Rate	9.39%
CPS 2011-A [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date	Apr-18
Receivables Pledged at end of period	33,088
Initial Principal	100,364
Outstanding Principal	29,533	48,368
Weighted Average Contractual Interest Rate	3.54%
CPS 2011-B [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date	Sep-18
Receivables Pledged at end of period	50,758
Initial Principal	109,936
Outstanding Principal	50,286	70,863
Weighted Average Contractual Interest Rate	4.70%
CPS 2011-C [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date	Mar-19
Receivables Pledged at end of period	63,410
Initial Principal	119,400
Outstanding Principal	63,429	88,269
Weighted Average Contractual Interest Rate	5.03%
CPS 2012-A [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date	Jun-19
Receivables Pledged at end of period	73,288
Initial Principal	155,000
Outstanding Principal	72,964	105,485
Weighted Average Contractual Interest Rate	3.58%
CPS 2012-B [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date	Sep-19
Receivables Pledged at end of period	96,641
Initial Principal	141,500
Outstanding Principal	95,324	122,329
Weighted Average Contractual Interest Rate	3.24%
CPS 2012-C [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date	Dec-19
Receivables Pledged at end of period	103,877
Initial Principal	147,000
Outstanding Principal	101,575	135,219
Weighted Average Contractual Interest Rate	2.56%
CPS 2012-D [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date	Mar-20
Receivables Pledged at end of period	124,318
Initial Principal	160,000
Outstanding Principal	118,237	160,000
Weighted Average Contractual Interest Rate	2.12%
CPS 2013-A [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date	Jun-20
Receivables Pledged at end of period	165,276
Initial Principal	185,000
Outstanding Principal	157,015
Weighted Average Contractual Interest Rate	1.85%
CPS 2013-B [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date	Sep-20
Receivables Pledged at end of period	192,628
Initial Principal	205,000
Outstanding Principal	189,696
Weighted Average Contractual Interest Rate	2.28%
CPS 2013-C [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date	Dec-20
Receivables Pledged at end of period	137,989
Initial Principal	205,000
Outstanding Principal	$ 205,000
Weighted Average Contractual Interest Rate	2.36%