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Distressed and Other Residential Mortgage Loans, Net - Delinquencies in Portfolio of Residential Mortgage Loans Held in Securitization Trusts (Details) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 USD ($) loan | Dec. 31, 2018 USD ($) loan
Financing Receivable, Past Due [Line Items] |  |
Real estate owned through foreclosure, Number of Delinquent Loans | loan | 1 |
Real estate owned through foreclosure, Total Unpaid Principal | $ | $ 360 |
Real estate owned through foreclosure, % of Loan Portfolio | 0.73% |
90 |  |
Financing Receivable, Past Due [Line Items] |  |
Number of Delinquent Loans | loan | 17 | 19
Total Unpaid Principal | $ | $ 10,289 | $ 10,926
% of Loan Portfolio | 20.92% | 18.16%

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