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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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