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Mortgage Notes Payable - Footnotes (Details) - USD ($) | Mar. 27, 2025 | Oct. 28, 2024 | Aug. 22, 2024 | Mar. 19, 2024 | Jan. 25, 2024 | Oct. 06, 2023 | Jun. 30, 2025 | Dec. 31, 2024 | Oct. 24, 2024 | May 14, 2024 | Apr. 09, 2024
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |
Debt, fair value |  |  |  |  |  |  | $ 57,685,000 | $ 75,926,000 |  |  |
Unamortized deferred finance costs |  |  |  |  |  |  | 20,309,000 | 22,042,000 |  |  |
Arrowhead Towne Center |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |
Debt, fair value |  |  |  |  |  |  | 23,202,000 | 27,552,000 |  |  |
Lakewood Center |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |
Debt, fair value |  |  |  |  |  |  | 13,149,000 | 19,723,000 |  |  |
Los Cerritos Center |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |
Debt, fair value |  |  |  |  |  |  | 18,547,000 | 22,521,000 |  |  |
South Plains Mall |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |
Debt, fair value |  |  |  |  |  |  | $ 2,787,000 | $ 6,130,000 |  |  |
Danbury Fair Mall |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |
Debt issued |  |  | $ 85,000 |  | $ 155,000,000 |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  | 6.72% |  | 6.39% |  |  |  |  |  |
Fashion Outlets at Niagara Falls USA |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |
Extension term (in years) |  |  |  | 3 years |  |  |  |  |  |  |
Variable interest rate spread (as a percent) |  |  |  |  |  | 5.90% |  |  |  |  |
Queens Center |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  | 5.37% |  |  |  |  |  |  |  |  |
Face amount on debt |  | $ 525,000,000 |  |  |  |  |  |  |  |  |
Debt instrument term (in years) |  | 5 years |  |  |  |  |  |  |  |  |
Santa Monica Place |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |
Debt instrument, default rate (as a percent) |  |  |  |  |  |  |  |  |  |  | 4.00%
Washington Square |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) | 5.58% |  |  |  |  |  |  |  |  |  |
Face amount on debt | $ 340,000 |  |  |  |  |  |  |  |  |  |
Debt instrument term (in years) | 10 years |  |  |  |  |  |  |  |  |  |
Arrowhead Towne Center | Joint Venture |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |
Ownership percentage at completion of acquisition (as a percent) |  |  |  |  |  |  |  |  |  | 100.00% |
Lakewood Center | Joint Venture |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |
Ownership percentage at completion of acquisition (as a percent) |  |  |  |  |  |  |  |  | 100.00% |  |
Lakewood Center | Joint Venture | Third Party |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |
Ownership percentage (as a percent) |  |  |  |  |  |  |  |  | 40.00% |  |
Los Cerritos Center | Joint Venture |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |
Ownership percentage at completion of acquisition (as a percent) |  |  |  |  |  |  |  |  | 100.00% |  |
Los Cerritos Center | Joint Venture | Third Party |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |
Ownership percentage (as a percent) |  |  |  |  |  |  |  |  | 40.00% |  |

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