Annual report pursuant to Section 13 and 15(d)

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

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Fair Value Schedule of Financing Receivables, Non Accrual Status (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Fair Value, Option, Quantitative Disclosures [Line Items]    
Residential mortgage loans held-for-sale, at fair value $ 40,146 $ 811,431
Collateralized borrowings in securitization trusts, at fair value 3,037,196 2,000,110
Residential mortgage loans held-for-investment in securitization trusts, at fair value 3,271,317 3,173,727
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 49,986 812,661
Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status 25,445 30,438
Fair Value, Option, Loans Held as Assets, 90 Days or More Past Due 21,759 26,702
Loans Held-for-Sale, Residential Mortgages [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Residential mortgage loans held-for-sale, at fair value 40,146 811,431
Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status 21,162 25,771
Fair Value, Option, Loans Held as Assets, 90 Days or More Past Due 18,203 22,470
Loans Held-for-Investment, Residential Mortgages [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status 2,408 868
Fair Value, Option, Loans Held as Assets, 90 Days or More Past Due 1,419 868
Residential mortgage loans held-for-investment in securitization trusts, at fair value 3,271,317 3,173,727
Loans Held-for-Investment, Residential Mortgages, Unpaid Principal [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status 2,373 860
Fair Value, Option, Loans Held as Assets, 90 Days or More Past Due 1,401 860
Residential mortgage loans held-for-investment in securitization trusts, at fair value 3,234,044 3,143,515
Collateralized Borrowings, Unpaid Principal [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Collateralized borrowings in securitization trusts, at fair value 3,015,162 1,987,628
Borrowings [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Collateralized borrowings in securitization trusts, at fair value $ 3,037,196 $ 2,000,110