Investments in and Advances to Unconsolidated Affiliates - Fund Investments - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) Property	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) Property	Sep. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)
Schedule of Equity Method Investments [Line Items]
Number of retail properties | Property	202		202
Proceeds from the disposition of properties , net			$ 195,367	$ 63,901
Impairment of investments	$ (57,423)		(57,423)
840 N. Michigan Avenue
Schedule of Equity Method Investments [Line Items]
Impairment of investments			50,800
La Frontera Village
Schedule of Equity Method Investments [Line Items]
Purchase Price	81,400		81,400
Fund V
Schedule of Equity Method Investments [Line Items]
Purchase Price	15,900		15,900
Fund V | Bridge Loan
Schedule of Equity Method Investments [Line Items]
Long-term line of credit, noncurrent	31,700		31,700		$ 52,000
Fund V Acquisition One
Schedule of Equity Method Investments [Line Items]
Purchase Price	26,500		26,500
Mortgage Loan	57,000		57,000
Mortgage Loan Funded at Closing	55,500		55,500
Fund V Acquisition Two
Schedule of Equity Method Investments [Line Items]
Purchase Price	15,300		15,300
Wood Ridge Plaza
Schedule of Equity Method Investments [Line Items]
Purchase Price	49,300		49,300
Mortgage Loan	36,600		36,600
Mortgage Loan Funded at Closing	32,300		32,300
Self Storage Management
Schedule of Equity Method Investments [Line Items]
Proceeds from the disposition of properties , net			6,000
Gains (Losses) on Sales of Investment Real Estate			1,500
Shoppes at South Hills
Schedule of Equity Method Investments [Line Items]
Purchase Price	$ 47,600		$ 47,600