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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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Mortgage Notes Payable - Footnotes (Details) - USD ($)																12 Months Ended
Mortgage Notes Payable - Footnotes (Details) - USD ($)	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%