Investments in and Advances to Unconsolidated Affiliates - Fund Investments - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) Property	Mar. 31, 2021 USD ($)
Schedule of Equity Method Investments [Line Items]
Number of retail properties | Property	188
Proceeds from the disposition of properties and other investments, net	$ 116,619	$ 15,703
La Frontera Village
Schedule of Equity Method Investments [Line Items]
Purchase Price	81,400
Fund V | Bridge Loan
Schedule of Equity Method Investments [Line Items]
Long-term line of credit, noncurrent	52,000
Fund V Acquisition One
Schedule of Equity Method Investments [Line Items]
Purchase Price	26,500
Fund V Acquisition Two
Schedule of Equity Method Investments [Line Items]
Purchase Price	15,300
Wood Ridge Plaza
Schedule of Equity Method Investments [Line Items]
Purchase Price	49,300
Mortgage Loan	36,600
Mortgage Loan Funded at Closing	32,300
Self Storage Management
Schedule of Equity Method Investments [Line Items]
Proceeds from the disposition of properties and other investments, net	6,000
Gains (Losses) on Sales of Investment Real Estate	$ 1,500