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Mortgage Notes Payable - Footnotes (Details) - USD ($) |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |  |  |  |
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Oct. 28, 2024 | Aug. 22, 2024 | Mar. 19, 2024 | Jan. 25, 2024 | Nov. 16, 2023 | Oct. 06, 2023 | Jul. 09, 2023 | Jun. 05, 2023 | Jan. 20, 2023 | Jan. 03, 2023 | Dec. 09, 2022 | May 06, 2022 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Oct. 24, 2024 | May 14, 2024 | Apr. 09, 2024 | Jan. 22, 2024
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, fair value |  |  |  |  |  |  |  |  |  |  |  |  | $ 75,926,000 |  |  |  |  |  |
Unamortized deferred finance costs |  |  |  |  |  |  |  |  |  |  |  |  | 22,042,000 | $ 21,148,000 |  |  |  |  |
Payments to acquire interest in joint venture |  |  |  |  |  |  |  |  |  |  |  |  | 48,967,000 | 81,158,000 | $ 81,718,000 |  |  |  |
Repayments of debt |  |  |  |  |  |  |  |  |  |  |  |  | 2,023,651,000 | 863,258,000 | $ 406,075,000 |  |  |  |
Mortgage notes payable |  |  |  |  |  |  |  |  |  |  |  |  | 4,894,525,000 | 4,136,136,000 |  |  |  |  |
Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage notes payable |  |  |  |  |  |  |  |  |  |  |  |  | 3,461,032,000 | $ 5,445,411,000 |  |  |  |  |
Arrowhead Towne Center | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset acquisition, percentage of shares owned (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |
Arrowhead Towne Center | Third Party | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture ownership percent acquired (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 40.00% |  |
Lakewood Center | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset acquisition, percentage of shares owned (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |
Lakewood Center | Third Party | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture ownership percent acquired (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 40.00% |  |  |
Los Cerritos Center | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset acquisition, percentage of shares owned (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |
Los Cerritos Center | Third Party | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture ownership percent acquired (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 40.00% |  |  |
South Plains Mall | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset acquisition, percentage of shares owned (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |
South Plains Mall | Third Party | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture ownership percent acquired (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 40.00% |  |
Arrowhead Towne Center |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, fair value |  |  |  |  |  |  |  |  |  |  |  |  | 27,552,000 |  |  |  |  |  |
Asset acquisition, percentage of shares owned (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |
Lakewood Center |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, fair value |  |  |  |  |  |  |  |  |  |  |  |  | 19,723,000 |  |  |  |  |  |
Los Cerritos Center |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, fair value |  |  |  |  |  |  |  |  |  |  |  |  | 22,521,000 |  |  |  |  |  |
South Plains Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, fair value |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,130,000 |  |  |  |  |  |
Freehold Raceway Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture ownership percent acquired (as a percent) |  |  |  |  | 49.90% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset acquisition, percentage of shares owned (as a percent) |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire interest in joint venture |  |  |  |  | $ 5,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Danbury Fair Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issued |  | $ 85,000,000 |  | $ 155,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  | 6.72% |  | 6.39% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fashion District Philadelphia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  |  |  |  | $ 26,107,000 |  |  |  |  |  |  |  |  |  |
Mortgage notes payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8,171,000
Extension term |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |  |  |  |  |
Fashion District Philadelphia | SOFR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable interest rate spread (as a percent) |  |  |  |  |  |  |  |  | 3.60% |  |  |  |  |  |  |  |  |  |
Fashion Outlets at Niagara Mortgage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable interest rate spread (as a percent) |  |  |  |  |  | 5.90% |  |  |  |  |  |  |  |  |  |  |  |  |
Extension term |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Green Acres Mall and Green Acres Commons |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  |  |  |  |  | 5.90% |  |  |  |  |  |  |  |  |
Extension term |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  | $ 370,000,000 |  |  |  |  |  |  |  |  |
The Oaks One Mortgage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 5.25% |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  |  |  |  |  |  |  | $ 5,000,000 |  |  |  |  |  |  |
Extension term |  |  |  |  |  |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  |  |  | $ 10,000 |  |  |  |  |  |  |  |  |  |  |
Queens Center |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) | 5.37% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | $ 525,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument term (in years) | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Santa Monica Place |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Extension term |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |
Debt instrument, default rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.00% |
Santa Monica Place | SOFR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable interest rate spread (as a percent) |  |  |  |  |  |  | 1.52% |  |  |  |  |  |  |  |  |  |  |  |
Interest rate cap (as a percent) |  |  |  |  |  |  |  |  |  |  | 4.00% |  |  |  |  |  |  |  |
Santa Monica Place | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable interest rate spread (as a percent) |  |  |  |  |  |  | 1.48% |  |  |  |  |  |  |  |  |  |  |  |
Interest rate cap (as a percent) |  |  |  |  |  |  |  |  |  |  | 4.00% |  |  |  |  |  |  |  |

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