Investments in Real Estate Partnerships - Summary of Shopping Centers and Land Parcels Disposed of Unconsolidated Real Estate Partnerships (Details) - Unconsolidated Properties [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) Property	Dec. 31, 2020 USD ($) Property	Dec. 31, 2019 USD ($) Property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Sale of Equity Method Investments	$ 224,708	$ 27,974	$ 142,754
Equity Method Investment, Realized Gain (Loss) on Disposal	75,162	7,147	64,798
Equity Method Investment, Realized Gain (Loss) on Disposal, Parent Company's Share	$ 9,380	$ 2,413	$ 29,422
Operating Segments [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties sold | Property	4	2	4
Land [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties sold | Property	1	0	0