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Equity Investments, at Fair Value - Schedule of Income (Loss) From Investments (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Schedule of Equity Method Investments [Line Items] |  |
Unrealized gain, net | $ (83,659) | $ 26,166
Equity investments | Single-Family Equity Ownership Interests |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | 28 | (2,100)
Equity investments | Joint venture equity investments in multi-family properties |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | 250 | 0
Unrealized gain, net | 300 |
Morrocroft Neighborhood Stabilization Fund II, LP (1) | Equity investments | Single-Family Equity Ownership Interests |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | 28 | 1,188
Headlands Asset Management Fund III (Cayman), LP (Headlands Flagship Opportunity Fund Series I) (2) | Equity investments | Single-Family Equity Ownership Interests |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | 0 | (3,288)
GWR Cedars Partners, LLC | Equity investments | Joint venture equity investments in multi-family properties |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | 100 | 0
GWR Gateway Partners, LLC | Equity investments | Joint venture equity investments in multi-family properties |  |
Schedule of Equity Method Investments [Line Items] |  |
Change in fair value, gain (loss) | $ 150 | $ 0

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