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Mortgage Notes Payable - Footnotes (Details) - USD ($) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |  |  |  |
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Jan. 24, 2024 | Nov. 16, 2023 | Jul. 01, 2023 | Jun. 05, 2023 | Jan. 20, 2023 | Jan. 03, 2023 | Dec. 09, 2022 | Nov. 28, 2022 | Aug. 26, 2022 | Jul. 01, 2022 | May 06, 2022 | Oct. 26, 2021 | Sep. 17, 2021 | Mar. 25, 2021 | Jan. 22, 2021 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Apr. 01, 2024 | Jan. 22, 2024 | Jan. 01, 2024 | Oct. 01, 2023
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unamortized deferred finance costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 21,148,000 | $ 13,830,000 |  |  |  |  |
Repayments of debt |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,142,000 |  |  | 863,258,000 | 406,075,000 | $ 2,020,395,000 |  |  |  |
Mortgage notes payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,136,136,000 | 4,240,596,000 |  |  |  |  |
Payments to Acquire Interest in Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 81,158,000 | 81,718,000 | $ 86,846,000 |  |  |  |
Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage notes payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,445,411,000 | $ 5,491,250,000 |  |  |  |  |
Freehold Raceway Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest in the loan assumed by a third party (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 49.90% |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Chandler Fashion Center |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest in the loan assumed by a third party (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 49.90% |  |  |  |  |  |
Danbury Fair Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  | 7.50% |  |  |  |  |  |  | 5.50% |  |  |  |  |  |  |  |  |  |  |  | 8.00%
Repayments of debt |  |  | $ 10,000 |  |  |  |  |  |  | $ 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Danbury Fair Mall | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) | 6.39% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8.50% |
Debt issued | $ 155,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Danbury Fair Mall | Subsequent Event | Expected |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9.00% |  |  |
The Shops at Atlas Park | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issued |  |  |  |  |  |  |  |  |  |  |  | $ 65,000,000 |  |  |  |  |  |  |  |  |  |
Variable interest rate spread (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 4.26% |  |  |  |  |  |  |  |  |  |
The Shops at Atlas Park | SOFR | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate cap (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 5.76% |  |  |  |  |  |  |  |  |  |
The Shops at Atlas Park | LIBOR | Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable interest rate spread (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 4.15% |  |  |  |  |  |  |  |  |  |
Interest rate cap (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 3.00% |  |  |  |  |  |  |  |  |  |
Fashion District Philadelphia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  | $ 26,107,000 |  |  | $ 7,117,000 | $ 83,058,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Extension term |  |  |  |  | 1 year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fashion District Philadelphia | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage notes payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8,171,000 |  |
Fashion District Philadelphia | SOFR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable interest rate spread (as a percent) |  |  |  |  | 3.60% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Green Acres Commons |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,680,000 |  |  |  |  |  |  |  |
Extension term |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |
Green Acres Commons | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable interest rate spread (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.75% |  |  |  |  |  |  |  |
Green Acres Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 9,000,000 |  |  |  |  |  |  |
Extension term |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |  |
Green Acres Mall and Green Acres Commons |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  | 5.90% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  | $ 370,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument term (in years) |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
The Oaks One Mortgage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  |  |  |  |  |  |  |  |  | 5.25% |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  | $ 10,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  |  |  |  |  |  | $ 5,000,000 |  |  |  |  |  |  |  |  |  |  |
Extension term |  |  |  |  |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |
Santa Monica Place |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Extension term |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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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