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Equity Investments, at Fair Value - Schedule of Income (Loss) From Investments (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Schedule of Equity Method Investments [Line Items] |  |  |
Unrealized gains (losses), net | $ 97,196 | $ (347,363) | $ 95,649
Equity investments |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Change in fair value, gain (loss) | 20,462 | 18,670 | 24,633
Equity investments | Single-Family Equity Ownership Interests |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Change in fair value, gain (loss) | 614 | (2,166) | 9,113
Equity investments | Joint Venture Equity Investments in Multi-Family Properties |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Change in fair value, gain (loss) | (3,291) | (1,430) | 150
Constructive Loans, LLC | Equity investments | Single-Family Equity Ownership Interests |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Change in fair value, gain (loss) | 614 | (1,750) | 2,750
Unrealized gains (losses), net | (5,200) | 1,800 | 2,800
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 | (416) | 6,378
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 | (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 gains (losses), net | (3,300) | (1,400) | 200
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) | (823) | (1,050) | 60
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) | $ (2,468) | $ (380) | $ 90

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