Quarterly report pursuant to Section 13 or 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
Sep. 30, 2016
Dec. 31, 2015
Fair Value, Option, Quantitative Disclosures [Line Items]    
Residential mortgage loans held-for-sale, at fair value $ 723,174 $ 811,431
Collateralized borrowings in securitization trusts, at fair value 3,375,906 2,000,110
Residential mortgage loans held-for-investment in securitization trusts, at fair value 3,620,037 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 720,609 812,661
Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status 51,156 30,438
Fair Value, Option, Loans Held as Assets, 90 Days or More Past Due 45,759 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 723,174 811,431
Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status 45,843 25,771
Fair Value, Option, Loans Held as Assets, 90 Days or More Past Due 40,936 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 887 868
Fair Value, Option, Loans Held as Assets, 90 Days or More Past Due 887 868
Residential mortgage loans held-for-investment in securitization trusts, at fair value 3,620,037 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 860 860
Fair Value, Option, Loans Held as Assets, 90 Days or More Past Due 860 860
Residential mortgage loans held-for-investment in securitization trusts, at fair value 3,499,285 3,143,515
Collateralized Borrowings, Unpaid Principal [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Collateralized borrowings in securitization trusts, at fair value 3,277,103 1,987,628
Borrowings [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Collateralized borrowings in securitization trusts, at fair value $ 3,375,906 $ 2,000,110