Annual report pursuant to Section 13 and 15(d)

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

v3.20.4
Fair Value, Quantitative Information about Level 3 Fair Value Measurements (Details)
Dec. 31, 2020
Dec. 31, 2019
Measurement Input, Constant Prepayment Rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.194 0.148
Measurement Input, Constant Prepayment Rate [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.141 0.126
Measurement Input, Constant Prepayment Rate [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.235 0.164
Measurement Input, Delinquency [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.022 0.009
Measurement Input, Delinquency [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.015 0.007
Measurement Input, Delinquency [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.026 0.010
Measurement Input, Discount Rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.048 0.072
Measurement Input, Discount Rate [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.044 0.064
Measurement Input, Discount Rate [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.071 0.078
Measurement Input, Per Loan Annual Cost to Service [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 68.27 66.62
Measurement Input, Per Loan Annual Cost to Service [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 64.56 63.38
Measurement Input, Per Loan Annual Cost to Service [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 79.43 78.04