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Investments in and Advances to Unconsolidated Affiliates - Core Portfolio - Additional Information (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Jan. 31, 2023 | Dec. 31, 2022
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Schedule of Equity Method Investments [Line Items] |  |  |  |
Investments carried at fair value or cost | [1] | $ 4,554 |  | $ 4,315
Mervyns II |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Equity method investment, ownership percentage |  |  | 40.00% |
Core Portfolio | Fifth Wall Ventures Retail Fund, L.P. |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Investments carried at fair value or cost |  |  |  | $ 200
[1] | Includes cost-method investment in Fifth Wall and other investments.

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