6. Interest Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Interest Expense Details
Securitization trust debt	$ 8,230	$ 9,139	$ 17,368	$ 19,159
Warehouse debt	1,297	1,668	2,579	3,064
Senior secured debt, related party	2,112	3,259	4,875	6,796
Debt secured by receivables at fair value	1,027	4,297	2,813	10,087
Residual interest debt	1,094	646	1,586	1,394
Subordinated debt	841	818	1,726	1,636
Total interest expense	$ 14,601	$ 19,827	$ 30,947	$ 42,136