Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.1
Fair Value, Quantitative Information about Level 3 Fair Value Measurements (Details)
Mar. 31, 2021
Dec. 31, 2020
Measurement Input, Constant Prepayment Rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.131 0.194
Measurement Input, Constant Prepayment Rate [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.106 0.141
Measurement Input, Constant Prepayment Rate [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.175 0.235
Measurement Input, Delinquency [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.019 0.022
Measurement Input, Delinquency [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.012 0.015
Measurement Input, Delinquency [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.025 0.026
Measurement Input, Discount Rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.048 0.048
Measurement Input, Discount Rate [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.048 0.047
Measurement Input, Discount Rate [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.093 0.097
Measurement Input, Per Loan Annual Cost to Service [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 67.13 68.27
Measurement Input, Per Loan Annual Cost to Service [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 66.69 64.56
Measurement Input, Per Loan Annual Cost to Service [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 84.26 79.43