Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
FAIR VALUE MEASUREMENT - Information Regarding the Inputs used in Valuing the Servicer Advances (Details) - Servicer Advances
3 Months Ended
Mar. 31, 2019
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Outstanding Servicer Advances to UPB of Underlying Residential Mortgage Loans 1.40%
Mortgage servicing amount 0.00196
Mortgage servicing amount 0.98%
Prepayment Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Servicing asset, measurement input 0.109
Delinquency  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Servicing asset, measurement input 0.169
Discount Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Servicing asset, measurement input 0.056
Collateral Weighted Average Maturity (Years) | Weighted Average  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Servicing asset, term 23 years 2 months 12 days