4. Securitization Trust Debt (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Schedule of Held-to-maturity Securities [Line Items]
Receivables Pledged at end of period	$ 940,114
Initial Principal	1,679,617
Outstanding Principal	983,887	792,597
CPS 2008-A [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Oct-14
Receivables Pledged at end of period
Initial Principal	310,359
Outstanding Principal		40,713
Weighted Average Contractual Interest Rate at March 31, 2013
Page Five Funding [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Jan-18
Receivables Pledged at end of period	15,902
Initial Principal	46,058
Outstanding Principal	14,631	21,251
Weighted Average Contractual Interest Rate at March 31, 2013	9.42%
CPS 2011-A [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Apr-18
Receivables Pledged at end of period	38,441
Initial Principal	100,364
Outstanding Principal	35,026	48,368
Weighted Average Contractual Interest Rate at March 31, 2013	3.70%
CPS 2011-B [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Sep-18
Receivables Pledged at end of period	57,385
Initial Principal	109,936
Outstanding Principal	57,535	70,863
Weighted Average Contractual Interest Rate at March 31, 2013	4.72%
CPS 2011-C [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Mar-19
Receivables Pledged at end of period	71,483
Initial Principal	119,400
Outstanding Principal	71,437	88,269
Weighted Average Contractual Interest Rate at March 31, 2013	5.05%
CPS 2012-A [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Jun-19
Receivables Pledged at end of period	82,727
Initial Principal	155,000
Outstanding Principal	82,751	105,485
Weighted Average Contractual Interest Rate at March 31, 2013	3.61%
CPS 2012-B [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Sept-19
Receivables Pledged at end of period	107,205
Initial Principal	141,500
Outstanding Principal	103,442	122,329
Weighted Average Contractual Interest Rate at March 31, 2013	3.19%
CPS 2012-C [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Dec-19
Receivables Pledged at end of period	115,057
Initial Principal	147,000
Outstanding Principal	110,018	135,219
Weighted Average Contractual Interest Rate at March 31, 2013	2.51%
CPS 2012-D [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Mar-20
Receivables Pledged at end of period	137,136
Initial Principal	160,000
Outstanding Principal	131,283	160,000
Weighted Average Contractual Interest Rate at March 31, 2013	2.07%
CPS 2013-A [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Jun-20
Receivables Pledged at end of period	176,266
Initial Principal	185,000
Outstanding Principal	172,764
Weighted Average Contractual Interest Rate at March 31, 2013	1.80%
CPS 2013-B [Member]
Schedule of Held-to-maturity Securities [Line Items]
Final Scheduled Payment Date (1)	Sept-20
Receivables Pledged at end of period	138,512
Initial Principal	205,000
Outstanding Principal	$ 205,000
Weighted Average Contractual Interest Rate at March 31, 2013	0.24%