Securitization Transactions Narrative (Details) - USD ($) $ in Thousands |
9 Months Ended | |||||
|---|---|---|---|---|---|---|
Sep. 30, 2022 |
Dec. 31, 2021 |
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| Securitization Transactions [Line Items] | ||||||
| Securities, at fair value(1)(2) | [1],[2] | $ 1,522,772 | $ 2,087,360 | |||
| Investment in unconsolidated entities, at fair value | [1] | 171,379 | 195,643 | |||
| Participation in Multi-Seller Consumer Loan Securitization [Member] | ||||||
| Securitization Transactions [Line Items] | ||||||
| Investment in unconsolidated entities, at fair value | $ 10,000 | $ 11,500 | ||||
| Non-QM loan securitization | ||||||
| Securitization Transactions [Line Items] | ||||||
| Threshold for exercising Optional Redemption | 30.00% | |||||
| Percentage used to calculate servicing administrator fee | 0.03% | |||||
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