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Equity Investments, at Fair Value - Schedule of Income (Loss) From Investments (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Schedule of Equity Method Investments [Line Items] |  |  |  |
Unrealized (losses) gains, net | $ (128,056) | $ 30,138 | $ (279,408) | $ 80,157
Equity investments | Single-Family Equity Ownership Interests |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Change in fair value, gain (loss) | (3,500) | 2,137 | (1,700) | 4,309
Equity investments | Joint venture equity investments in multi-family properties |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Change in fair value, gain (loss) | (1,053) | 0 | (504) | 0
Morrocroft Neighborhood Stabilization Fund II, LP | Equity investments | Single-Family Equity Ownership Interests |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Change in fair value, gain (loss) | 0 | 2,137 | 50 | 4,324
Constructive Loans, LLC | Equity investments | Single-Family Equity Ownership Interests |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Change in fair value, gain (loss) | (3,500) | 0 | (1,750) | 0
Unrealized (losses) gains, net | (3,500) |  | (1,800) |
Headlands Asset Management Fund III (Cayman), LP (Headlands Flagship Opportunity Fund Series I) | Equity investments | Single-Family Equity Ownership Interests |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Change in fair value, gain (loss) | 0 | 0 | 0 | (15)
Headlands Asset Management Fund III (Cayman), LP (Headlands Flagship Opportunity Fund Series I) | Equity investments | Joint venture equity investments in multi-family properties |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Unrealized (losses) gains, net | (1,100) |  | (500) |
GWR Cedars Partners, LLC (1) | Equity investments | Joint venture equity investments in multi-family properties |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Change in fair value, gain (loss) | (1,141) | 0 | (930) | 0
GWR Gateway Partners, LLC (1) | Equity investments | Joint venture equity investments in multi-family properties |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Change in fair value, gain (loss) | $ 88 | $ 0 | $ 426 | $ 0

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