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Fair Value of Financial Instruments (Details 4) - Recurring basis - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Significant unobservable inputs used in our recurring Level 3 fair value measurements    
Derivative liabilities $ 1,232 $ 661
Significant Unobservable Inputs (Level 3) | Derivative liabilities    
Significant unobservable inputs used in our recurring Level 3 fair value measurements    
Derivative liabilities $ 1,232 $ 661
Significant Unobservable Inputs (Level 3) | Derivative liabilities | Discounted cash flows | Weighted average    
Significant unobservable inputs used in our recurring Level 3 fair value measurements    
Constant prepayment rate 10.60% 5.40%
Default rate 0.50% 1.85%
Reference STACR credit spread 3.93% 3.72%