Annual report pursuant to Section 13 and 15(d)

Fair Value Schedule of Financing Receivables, Non Accrual Status (Details)

v3.8.0.1
Fair Value Schedule of Financing Receivables, Non Accrual Status (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Fair Value, Option, Quantitative Disclosures [Line Items]        
Residential mortgage loans held-for-investment in securitization trusts, at fair value $ 0 $ 3,271,317    
Residential mortgage loans held-for-sale, at fair value 30,414 40,146 $ 811,431 $ 535,712
Collateralized borrowings in securitization trusts, at fair value 0 3,037,196    
Loans Held-for-Investment, Residential Mortgages, Unpaid Principal [Member]        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Residential mortgage loans held-for-investment in securitization trusts, at fair value 0 3,234,044    
Nonaccrual loans 0 2,373    
Loans 90 days past due 0 1,401    
Loans Held-for-Investment, Residential Mortgages [Member]        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Residential mortgage loans held-for-investment in securitization trusts, at fair value 0 3,271,317    
Nonaccrual loans 0 2,408    
Loans 90 days past due 0 1,419    
Loan Held-for-Sale, Residential Mortgages, Unpaid Principal [Member]        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Residential mortgage loans held-for-sale, at fair value 37,632 49,986    
Nonaccrual loans 13,511 25,445    
Loans 90 days past due 12,136 21,759    
Loans Held-for-Sale, Residential Mortgages [Member]        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Residential mortgage loans held-for-sale, at fair value 30,414 40,146    
Nonaccrual loans 10,963 21,162    
Loans 90 days past due 9,857 18,203    
Collateralized Borrowings, Unpaid Principal [Member]        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Collateralized borrowings in securitization trusts, at fair value 0 3,015,162    
Collateralized Borrowings [Member]        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Collateralized borrowings in securitization trusts, at fair value $ 0 $ 3,037,196