Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
Fair Value, Quantitative Information about Level 3 Fair Value Measurements (Details)
9 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Constant prepayment speed 10.80% 9.20%
Delinquency 1.70% 1.90%
Discount rate 9.90% 9.40%
Minimum [Member]    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Constant prepayment speed 9.20%  
Delinquency 1.40%  
Discount rate 8.60%  
Maximum [Member]    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Constant prepayment speed 12.20%  
Delinquency 2.00%  
Discount rate 11.00%