6. Interest Income and Interest Expense (Detail 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Components of interest expense
Securitization trust debt	$ 9,398	$ 10,238	$ 28,557	$ 33,579
Warehouse debt	2,179	2,829	5,243	7,925
Senior secured debt, related party	3,077	3,153	9,873	9,001
Debt secured by receivables at fair value	3,275	985	13,362	985
Residual interest debt	731	1,029	2,125	3,553
Subordinated debt	900	777	2,536	2,334
Interest Expense	$ 19,560	$ 19,011	$ 61,696	$ 57,377