Securitization Transactions (Schedule of Assets and Liabilities Attributable to Consolidated VIEs) (Details) - USD ($) $ in Thousands |
Mar. 31, 2020 |
Dec. 31, 2019 |
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|---|---|---|---|---|
| Variable Interest Entity [Line Items] | ||||
| Cash and cash equivalents | [1] | $ 136,740 | $ 72,302 | |
| Loans, at fair value | [1] | 1,443,589 | 1,412,426 | |
| Real estate owned | [1] | 25,054 | 30,584 | |
| Investment related receivables | [1] | 408,332 | 123,120 | |
| Interest payable | [1] | 5,283 | 7,320 | |
| Other secured borrowings, at fair value | [1] | 549,668 | 594,396 | |
| Non-QM loan securitization | Consolidated Entities [Member] | ||||
| Variable Interest Entity [Line Items] | ||||
| Investment related receivables | 9,819 | 10,409 | ||
| Other secured borrowings, at fair value | 549,668 | 594,396 | ||
| Residential mortgage loans | ||||
| Variable Interest Entity [Line Items] | ||||
| Loans, at fair value | 939,372 | 932,203 | ||
| Securitized loans [Member] | Residential mortgage loans | Non-QM loan securitization | Consolidated Entities [Member] | ||||
| Variable Interest Entity [Line Items] | ||||
| Loans, at fair value | 581,181 | 628,415 | ||
| Real estate owned | $ 658 | $ 658 | ||
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