Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Fair Value, Quantitative Information about Level 3 Fair Value Measurements (Details)
Mar. 31, 2019
Dec. 31, 2018
Measurement Input, Constant Prepayment Rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.115 0.086
Measurement Input, Constant Prepayment Rate [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.099 0.076
Measurement Input, Constant Prepayment Rate [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.131 0.096
Measurement Input, Default Rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.015 0.013
Measurement Input, Default Rate [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.012 0.010
Measurement Input, Default Rate [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.018 0.015
Measurement Input, Discount Rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.075 0.094
Measurement Input, Discount Rate [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.065 0.082
Measurement Input, Discount Rate [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value measurement input 0.084 0.107