Annual report pursuant to Section 13 and 15(d)

Fair Value, Quantitative Information about Level 3 Fair Value Measurements (Details)

v3.19.3.a.u2
Fair Value, Quantitative Information about Level 3 Fair Value Measurements (Details)
Dec. 31, 2019
Dec. 31, 2018
Measurement Input, Constant Prepayment Rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.148 0.086
Measurement Input, Constant Prepayment Rate [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.126 0.076
Measurement Input, Constant Prepayment Rate [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.164 0.096
Measurement Input, Delinquency [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.009 0.013
Measurement Input, Delinquency [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.007 0.010
Measurement Input, Delinquency [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.010 0.015
Measurement Input, Discount Rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.072 0.094
Measurement Input, Discount Rate [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.064 0.082
Measurement Input, Discount Rate [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.078 0.107
Measurement Input, Per Loan Annual Cost to Service [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 66.62 69.34
Measurement Input, Per Loan Annual Cost to Service [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 63.38 66.10
Measurement Input, Per Loan Annual Cost to Service [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 78.04 77.32