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v3.21.2

Organization and Significant Accounting Policies - Schedule of Variable Interest Entities (Details) $ in Thousands | Sep. 30, 2021 USD ($) RetailShoppingCenter | Dec. 31, 2020 USD ($)
--- | --- | ---
Variable Interest Entity [Line Items] |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets | $ 10,853,903 | $ 10,936,904
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities | 4,710,439 | 4,878,757
Noncontrolling Interest in Variable Interest Entity | 28,057 | 28,685
Variable Interest Entity, Primary Beneficiary [Member] |  |
Variable Interest Entity [Line Items] |  |
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities | 64,434 | 6,340
Real Estate [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |
Variable Interest Entity [Line Items] |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets | 237,232 | 127,240
Cash and Cash Equivalents [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |
Variable Interest Entity [Line Items] |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets | $ 23,587 | $ 4,496
Partially Owned Properties [Member] |  |
Variable Interest Entity [Line Items] |  |
Number of real estate properties | RetailShoppingCenter | 114 |
Consolidated Properties [Member] |  |
Variable Interest Entity [Line Items] |  |
Number of real estate properties | RetailShoppingCenter | 10 |

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