Securitization Transactions (Schedule of Assets and Liabilities Attributable to Consolidated VIEs) (Details) - USD ($) $ in Thousands |
Sep. 30, 2022 |
Dec. 31, 2021 |
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|---|---|---|---|---|---|---|
| Variable Interest Entity [Line Items] | ||||||
| Other secured borrowings, at fair value | [1] | $ 1,635,829 | $ 984,168 | |||
| Loans, at fair value | [1],[2] | 3,822,895 | 2,415,321 | |||
| Real estate owned | [1],[2] | 20,738 | 24,681 | |||
| Investment related receivables | [1] | 172,826 | 122,175 | |||
| Residential mortgage loans | ||||||
| Variable Interest Entity [Line Items] | ||||||
| Loans, at fair value | 3,348,810 | 2,016,228 | ||||
| Consolidated Entities [Member] | Non-QM loan securitization | ||||||
| Variable Interest Entity [Line Items] | ||||||
| Other secured borrowings, at fair value | 1,635,829 | 984,168 | ||||
| Investment related receivables | 7,706 | 23,069 | ||||
| Consolidated Entities [Member] | Residential mortgage loans | Securitized loans [Member] | Non-QM loan securitization | ||||||
| Variable Interest Entity [Line Items] | ||||||
| Loans, at fair value | $ 1,762,845 | $ 1,041,545 | ||||
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