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Fair Value Measurements (Details 1) - Level 3 - Fair Value, Measurements, Recurring [Member]
12 Months Ended
Dec. 31, 2016
Minimum [Member] | Private Label CMOs  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Fair Value Inputs, Prepayment Rate 0.10%
Fair Value Inputs, Probability of Default 0.10%
Fair Value Inputs, Loss Severity 0.10%
Fair Value Inputs, Discount Rate 0.90%
Minimum [Member] | Asset-backed Securities [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Fair Value Inputs, Prepayment Rate 5.00%
Fair Value Inputs, Probability of Default 1.00%
Fair Value Inputs, Loss Severity 10.00%
Fair Value Inputs, Discount Rate 2.20%
Maximum [Member] | Private Label CMOs  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Fair Value Inputs, Prepayment Rate 29.30%
Fair Value Inputs, Probability of Default 15.40%
Fair Value Inputs, Loss Severity 96.50%
Fair Value Inputs, Discount Rate 24.00%
Maximum [Member] | Asset-backed Securities [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Fair Value Inputs, Prepayment Rate 40.00%
Fair Value Inputs, Probability of Default 5.00%
Fair Value Inputs, Loss Severity 91.00%
Fair Value Inputs, Discount Rate 8.50%
Weighted Average [Member] | Private Label CMOs  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Fair Value Inputs, Prepayment Rate 11.70%
Fair Value Inputs, Probability of Default 1.70%
Fair Value Inputs, Loss Severity 33.70%
Fair Value Inputs, Discount Rate 3.70%
Weighted Average [Member] | Asset-backed Securities [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Fair Value Inputs, Prepayment Rate 15.10%
Fair Value Inputs, Probability of Default 3.40%
Fair Value Inputs, Loss Severity 52.30%
Fair Value Inputs, Discount Rate 3.00%
Weighted Average [Member] | Warrant [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Volatility 17.90%
Risk-free interest rate 1.60%
Remaining life assumption (in years) 3 years 9 months 20 days