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Investments in Unconsolidated Joint Ventures - Narrative (Details) $ in Thousands |  |  |  |  |  |  | 3 Months Ended | 9 Months Ended |  |  |
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May 18, 2023 USD ($) property | Apr. 25, 2023 USD ($) | Mar. 03, 2023 USD ($) | Nov. 14, 2022 USD ($) | Aug. 02, 2022 USD ($) property | Feb. 02, 2022 USD ($) | Sep. 30, 2023 USD ($) | Jun. 30, 2023 USD ($) | Mar. 31, 2023 USD ($) | Sep. 30, 2022 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) | May 09, 2023 USD ($) | Aug. 01, 2022 property | May 17, 2018 property
Schedule of Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment loss |  |  |  |  |  |  | $ 152,798 |  |  | $ 5,148 | $ 153,464 | $ 15,006 |  |  |
Sears Deptford Mall And Vintage Faire Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  | $ 24,544 |  |  |  |  |  |  |  |  |  |
Ownership percentage at completion of acquisition (as a percent) |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |
Number of properties (property) | property |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |
Chandler Fashion Center, Danbury Fair Mall, Freehold Raceway Mall, Los Cerritos Center and Washington Square |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage at completion of acquisition (as a percent) | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Joint Venture | Sears South Plains |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment loss |  |  |  |  | $ 27,054 |  |  |  |  |  |  |  |  |  |
Joint Venture | Chandler Fashion Center, Danbury Fair Mall, Freehold Raceway Mall, Los Cerritos Center and Washington Square |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price | $ 46,687 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment loss |  |  |  |  |  |  |  |  | $ 50,197 |  |  |  |  |  |
Ownership percentage at completion of acquisition (as a percent) | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on acquisition of real estate |  |  |  |  |  |  |  | $ 1,166 |  |  |  |  |  |  |
Number of properties (property) | property | 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Joint Venture | Third Party | Sears Deptford Mall And Vintage Faire Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage (as a percent) |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |
Joint Venture | Third Party | Chandler Fashion Center, Danbury Fair Mall, Freehold Raceway Mall, Los Cerritos Center and Washington Square |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage (as a percent) | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
FlatIron Crossing | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  | $ 197,011 |  |  |  |  |  |  |  |  |
Debt issued |  |  |  |  |  | $ 175,000 |  |  |  |  |  |  |  |  |
FlatIron Crossing | Joint Venture | SOFR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable interest rate spread (as a percent) |  |  |  |  |  | 3.70% |  |  |  |  |  |  |  |  |
Interest rate cap (as a percent) |  |  |  |  |  | 4.00% |  |  |  |  |  |  |  |  |
Washington Square |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  | $ 9,000 |  |  |  |  |  |  |  |  |  |  |
Washington Square | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  | $ 15,000 |  |  |  |  |  |  |  |  |  |  |
Extension term (in years) |  |  |  | 4 years |  |  |  |  |  |  |  |  |  |  |
Washington Square | Joint Venture | SOFR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable interest rate spread (as a percent) |  |  |  | 4.00% |  |  |  |  |  |  |  |  |  |  |
Scottsdale Fashion Square | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  | $ 403,931 |  |  |  |  |  |  |  |  |  |  |  |
Debt issued |  |  | $ 700,000 |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  | 6.21% |  |  |  |  |  |  |  |  |  |  |  |
Deptford Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  | $ 5,100 |  |  |  |  |  |  |  |  |  |  |  |  |
Deptford Mall | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  | $ 10,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument term (in years) |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |
Deptford Mall | Joint Venture | SOFR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  | 3.73% |  |  |  |  |  |  |  |  |  |  |  |  |
Country Club Plaza |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, default amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 147,605 |  |
Country Club Plaza | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment loss |  |  |  |  |  |  | $ 107,673 |  |  |  | $ 107,673 |  |  |  |
Debt instrument, default amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 295,210 |  |
Chandler Fashion Center, Danbury Fair Mall, Freehold Raceway Mall, Los Cerritos Center and Washington Square | Joint Venture | Seritage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties (property) | property |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5
Sears Deptford Mall And Vintage Faire Mall | Joint Venture | Seritage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties (property) | property |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |

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