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6. Interest Expense (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Interest Expense Details    
Securitization trust debt $ 9,316 $ 9,137
Warehouse debt 877 1,282
Senior secured debt, related party 1,651 2,764
Debt secured by receivables at fair value 328 1,786
Residual interest debt 579 492
Subordinated debt 630 885
Total interest expense $ 13,381 $ 16,346