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Investments in Unconsolidated Joint Ventures - Narrative (Details) - USD ($)					3 Months Ended
	Feb. 02, 2022	Dec. 31, 2021	Oct. 26, 2021	Mar. 29, 2021	Mar. 31, 2022	Mar. 31, 2021
Schedule of Equity Method Investments
Impairment loss					$ 8,629,000	$ 29,608,000
MS Portfolio LLC
Schedule of Equity Method Investments
Impairment loss					$ 30,426,000
Paradise Valley Mall | Joint Venture
Schedule of Equity Method Investments
Ownership percentage (as a percent)				5.00%
Payments for joint venture				$ 3,819,000
The Shops At Atlas Park | Joint Venture
Schedule of Equity Method Investments
Debt issued			$ 65,000,000
The Shops At Atlas Park | Joint Venture | LIBOR
Schedule of Equity Method Investments
Variable interest rate spread (as a percent)			4.15%
Interest rate cap (as a percent)			3.00%
North Bridge,Chicago Illinois | Joint Venture
Schedule of Equity Method Investments
Loss on Investments		$ 28,276,000
Proceeds from divestiture of interest in joint venture		$ 21,000,000
FlatIron Crossing | Joint Venture
Schedule of Equity Method Investments
Debt issued	$ 175,000
Repayments of debt	$ 197,011,000
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%

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