Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENT - Information Regarding the Inputs used in Valuing the Servicer Advances (Details)

v3.10.0.1
FAIR VALUE MEASUREMENT - Information Regarding the Inputs used in Valuing the Servicer Advances (Details) - Servicer Advances
9 Months Ended
Sep. 30, 2018
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Outstanding Servicer Advances to UPB of Underlying Residential Mortgage Loans 1.50%
Mortgage servicing amount 0.00196
Mortgage servicing amount 0.93%
Prepayment Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Servicing asset, measurement input 0.111
Delinquency  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Servicing asset, measurement input 0.182
Discount Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Servicing asset, measurement input 0.059
Collateral Weighted Average Maturity (Years) | Weighted Average  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Servicing asset, term 23 years 2 months 19 days