XML 109 R98.htm IDEA: XBRL DOCUMENT v3.10.0.1
Use of Special Purpose Entities and Variable Interest Entities (Loan Securitization Transaction) (Details) - USD ($)
1 Months Ended 9 Months Ended 12 Months Ended
Jul. 31, 2018
May 31, 2018
Sep. 30, 2018
Dec. 31, 2017
Jul. 30, 2018
Variable Interest Entity [Line Items]          
Outstanding amount of Senior Bonds     $ 96,805,000 $ 96,773,000  
Asset-backed Securities, Securitized Loans and Receivables          
Variable Interest Entity [Line Items]          
Aggregate fair value   $ 319,100,000 $ 1,290,029,000 $ 620,924,000 $ 347,700,000
Weighted average interest rate     3.65% 3.14%  
Cash received     $ 802,815,000 $ 382,845,000  
Outstanding amount of Senior Bonds     714,203,000 363,944,000  
Debt issuance cost     4,100,000 2,300,000  
Senior Notes | Asset-backed Securities, Securitized Loans and Receivables          
Variable Interest Entity [Line Items]          
Principal amount of Securitized debt     802,817,000 382,847,000  
Proceeds from Senior bond sold with Step up feature     604,700,000 $ 233,700,000  
Debt instrument, basis spread on variable rate       300.00%  
Debt instrument, coupon step-up period       36 months  
Rated and Non-Rated Certificates | Asset-backed Securities, Securitized Loans and Receivables          
Variable Interest Entity [Line Items]          
Principal amount of Securitized debt     $ 275,174,000 $ 127,001,000  
Trust, Ownership in Residential Whole Loans | Asset-backed Securities, Securitized Loans and Receivables          
Variable Interest Entity [Line Items]          
Cash received $ 236,000,000 184,000,000      
Trust, Ownership in Residential Whole Loans | Senior Notes | Asset-backed Securities, Securitized Loans and Receivables          
Variable Interest Entity [Line Items]          
Principal amount of Securitized debt   $ 183,970,000     $ 236,000,000
Weighted average interest rate   3.875%     4.164%
Trust, Ownership in Residential Whole Loans | Non Rated Certificates | Asset-backed Securities, Securitized Loans and Receivables          
Variable Interest Entity [Line Items]          
Principal amount of Securitized debt   $ 46,400,000     $ 101,700,000