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Investments in and Advances to Unconsolidated Affiliates - Schedule of Investments (Parenthetical) (Details) - USD ($) $ in Thousands, shares in Millions | 9 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 30, 2023 | Jan. 31, 2023 | Dec. 31, 2022 | Aug. 31, 2022
Schedule of Equity Method Investments [Line Items] |  |  |  |
Note receivable from related party | $ 123,813 |  | $ 123,903 |
Allowance for credit losses | 988 |  | $ 898 | $ 500
Cost method investments effective ownership interest |  |  | 1.00% |
Variable Interest Entity, Not Primary Beneficiary |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Construction Commitment | $ 700 |  |  |
1238 Wisconsin Avenue |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Debt Instrument, Description of Variable Rate Basis | The loan is collateralized by the venture members' equity interest in the entity that holds the 1238 Wisconsin development property, bears interest at Prime + 1.0% subject to a 4.5% floor, and matures on December 28, 2023. The loan has a one-year extension option and i |  |  |
1238 Wisconsin Avenue | Core Portfolio |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Construction Commitment | $ 12,800 |  |  |
Note receivable from related party | 12,300 |  | $ 7,700 |
Allowance for credit losses | $ 100 |  | $ 100 |
Mervyns II |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Cost method investments effective ownership, shares |  | 2.5 | 4.1 |
Shoppes at South Hills |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Bridge Loan |  |  | $ 31,700 |

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