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Unconsolidated Affiliates and Noncontrolling Interests - Narrative (Details) $ in Thousands		1 Months Ended			6 Months Ended	9 Months Ended
	Oct. 01, 2021 USD ($)	Jun. 30, 2022 USD ($)	Apr. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Jun. 30, 2022 USD ($)	Sep. 30, 2022 USD ($) Entity	Sep. 30, 2021 USD ($)	Aug. 31, 2022 USD ($)	May 31, 2022
Schedule Of Equity Method Investments [Line Items]
Number of entities - equity method of accounting (entity) | Entity						25
Number of 50/50 joint ventures | Entity						16
Fair value carrying amount						$ 1,998,461
Gross proceeds from sale of property	$ 8,750
Gain on deconsolidation						36,250	$ 55,131
Loan agreement term		5 years
Nonrecourse
Schedule Of Equity Method Investments [Line Items]
Loan, fixed interest rate									5.85%
Loan agreement term					3 years
Ambassador Town Center J.V., LLC | Nonrecourse
Schedule Of Equity Method Investments [Line Items]
Fair value carrying amount		$ 42,492			$ 42,492
Debt instrument, maturity date		Jun. 30, 2029
Loan, fixed interest rate		4.35%			4.35%
Asheville Mall CMBS, LLC
Schedule Of Equity Method Investments [Line Items]
Fair value carrying amount								$ 62,121
EastGate Mall CMBS, LLC
Schedule Of Equity Method Investments [Line Items]
Fair value carrying amount						29,951
Bullseye, LLC
Schedule Of Equity Method Investments [Line Items]
Gross proceeds from sale of property				$ 10,500
Net profit from sale of property				$ 662
Greenbrier Mall
Schedule Of Equity Method Investments [Line Items]
Loan outstanding balance						61,647
Gain on deconsolidation						36,250
Outlet Shoppes of Bluegrass - Phase II
Schedule Of Equity Method Investments [Line Items]
Fair value carrying amount						$ 7,647
Shoppes at Eagle Point, LLC
Schedule Of Equity Method Investments [Line Items]
Ownership interest in joint venture (as a percent)						50.00%
Shoppes at Eagle Point, LLC | Nonrecourse
Schedule Of Equity Method Investments [Line Items]
Fair value carrying amount			$ 40,000
Debt instrument, maturity date			Oct. 31, 2022
Loan, fixed interest rate			5.40%
Loan agreement term			10 years
York Town Center Holding, LP
Schedule Of Equity Method Investments [Line Items]
Loan agreement term				18 months
York Town Center Holding, LP | Nonrecourse | Mortgage Note Payable
Schedule Of Equity Method Investments [Line Items]
Fair value carrying amount				$ 30,000
Debt Instrument, Interest Rate, Effective Percentage				4.75%
Minimum
Schedule Of Equity Method Investments [Line Items]
Ownership in variable interest entity (as a percent)						50.00%
Minimum | BI Development, LLC
Schedule Of Equity Method Investments [Line Items]
Ownership interest in joint venture (as a percent)						20.00%
Minimum | BI Development II, LLC
Schedule Of Equity Method Investments [Line Items]
Ownership interest in joint venture (as a percent)						20.00%
Minimum | Unconsolidated Affiliates
Schedule Of Equity Method Investments [Line Items]
Ownership interest in joint venture (as a percent)						33.00%
Maximum
Schedule Of Equity Method Investments [Line Items]
Ownership in variable interest entity (as a percent)						92.00%
Maximum | BI Development, LLC
Schedule Of Equity Method Investments [Line Items]
Ownership interest in joint venture (as a percent)						50.00%
Maximum | BI Development II, LLC
Schedule Of Equity Method Investments [Line Items]
Ownership interest in joint venture (as a percent)						50.00%
Maximum | Unconsolidated Affiliates
Schedule Of Equity Method Investments [Line Items]
Ownership interest in joint venture (as a percent)		100.00%			100.00%

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