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Investments in Unconsolidated Joint Ventures - Narrative (Details) ft² in Thousands |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |  |  |
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Jan. 10, 2024 USD ($) | Dec. 27, 2023 USD ($) ft² | Dec. 04, 2023 USD ($) | Nov. 01, 2023 USD ($) | May 18, 2023 USD ($) property | Apr. 25, 2023 USD ($) | Mar. 03, 2023 USD ($) | Nov. 14, 2022 USD ($) | Aug. 02, 2022 USD ($) | Feb. 02, 2022 USD ($) | Dec. 31, 2021 USD ($) | Oct. 26, 2021 USD ($) | Mar. 29, 2021 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Nov. 16, 2023 | May 09, 2023 USD ($) | May 17, 2018 property
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 49.90% |  |
Write-down of assets |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 153,495,000 | $ 15,045,000 | $ 67,344,000 |  |  |
Sears Deptford Mall And Vintage Faire Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset acquisition, consideration transferred |  |  |  |  |  |  |  |  | $ 24,544,000 |  |  |  |  |  |  |  |  |  |
Asset acquisition, percentage of shares owned (as a percent) |  |  |  |  | 100.00% |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |
Chandler Fashion Center, Danbury Fair Mall, Freehold Raceway Mall, Los Cerritos Center And Washington Square |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset acquisition, percentage of shares owned (as a percent) |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Joint Venture | Chandler Fashion Center, Danbury Fair Mall, Freehold Raceway Mall, Los Cerritos Center And Washington Square |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset acquisition, consideration transferred |  |  |  |  | $ 46,687,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties | property |  |  |  |  | 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Joint Venture | Third Party | Sears Deptford Mall And Vintage Faire Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture ownership percent acquired (as a percent) |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |
Joint Venture | Third Party | Chandler Fashion Center, Danbury Fair Mall, Freehold Raceway Mall, Los Cerritos Center And Washington Square |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture ownership percent acquired (as a percent) |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Joint Venture | Sears South Plains |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Write-down of assets |  |  |  |  | $ 51,363,000 |  |  |  |  |  |  |  |  |  | $ 27,054,000 |  |  |  |
Paradise Valley Mall | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  | 5.00% |  |  |  |  |  |
Payments for joint venture |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,819,000 |  |  |  |  |  |
The Shops at Atlas Park | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issued |  |  |  |  |  |  |  |  |  |  |  | $ 65,000,000 |  |  |  |  |  |  |
Variable interest rate spread (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 4.26% |  |  |  |  |  |  |
The Shops at Atlas Park | Joint Venture | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable interest rate spread (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 4.15% |  |  |  |  |  |  |
Interest rate cap (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 3.00% |  |  |  |  |  |  |
The Shops at Atlas Park | Joint Venture | SOFR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate cap (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 5.76% |  |  |  |  |  |  |
North Bridge,Chicago Illinois | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on Investments |  |  |  |  |  |  |  |  |  |  | $ 28,276,000 |  |  |  |  | $ 28,276,000 |  |  |
North Wabash,Chicago Illinois | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from divestiture of interest in joint venture |  |  |  |  |  |  |  |  |  |  | $ 21,000,000 |  |  |  |  |  |  |  |
FlatIron Crossing | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issued |  |  |  |  |  |  |  |  |  | $ 175,000,000 |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  |  |  |  |  | $ 197,011,000 |  |  |  |  |  |  |  |  |
FlatIron Crossing | Joint Venture | Period Two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate cap (as a percent) |  |  |  |  |  |  |  |  |  | 5.00% |  |  |  |  |  |  |  |  |
FlatIron Crossing | Joint Venture | SOFR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable interest rate spread (as a percent) |  |  |  |  |  |  |  |  |  | 3.70% |  |  |  |  |  |  |  |  |
FlatIron Crossing | Joint Venture | SOFR | Period One |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate cap (as a percent) |  |  |  |  |  |  |  |  |  | 4.00% |  |  |  |  |  |  |  |  |
Washington Square |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  | $ 9,000,000 |  |  |  | $ 9,000 |  |  |  |  |  |  |  |  |  |  |
Washington Square | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  | $ 15,000,000 |  |  |  | $ 15,000 |  |  |  |  |  |  |  |  |  |  |
Joint venture extension term (in years) |  |  |  |  |  |  |  | 4 years |  |  |  |  |  |  |  |  |  |  |
Washington Square | Joint Venture | SOFR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable interest rate spread (as a percent) |  |  |  |  |  |  |  | 4.00% |  |  |  |  |  |  |  |  |  |  |
Scottsdale Fashion Square | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issued |  |  |  |  |  |  | $ 700,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  |  | $ 403,931,000 |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  |  | 6.21% |  |  |  |  |  |  |  |  |  |  |  |
Deptford Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  | $ 5,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Deptford Mall | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  | $ 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument term (in years) |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |
Deptford Mall | Joint Venture | SOFR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  | 3.73% |  |  |  |  |  |  |  |  |  |  |  |  |
Country Club Plaza |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, debt default, amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 147,605,000 |
Country Club Plaza | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Write-down of assets |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,997,000 |  |  |  |  |
Debt instrument, debt default, amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 295,210,000 |
Chandler Fashion Center, Danbury Fair Mall, Freehold Raceway Mall, Los Cerritos Center And Washington Square | Joint Venture | Seritage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties | property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5
Tysons Corner LLC | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issued |  |  | $ 710,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  | $ 666,465,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tysons Corner LLC | Joint Venture | Fixed Rate Residential Mortgage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  | 6.60% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Office Property in Los Angeles |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage (as a percent) |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  | $ 324,632,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of property |  | 77,643,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gains on sales of investment real estate |  | $ 8,118,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Office Property in Los Angeles | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property area (in square feet) | ft² |  | 680 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of property |  | $ 700,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Propcor II Associates, LLC—Boulevard Shops | Joint Venture | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issued | $ 24,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate cap (as a percent) | 7.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt | $ 23,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Propcor II Associates, LLC—Boulevard Shops | Joint Venture | SOFR | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable interest rate spread (as a percent) | 2.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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