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Investments in and Advances to Unconsolidated Affiliates - Schedule of Investments (Parenthetical) (Details) - USD ($) $ in Thousands, shares in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Jan. 31, 2023 | Dec. 31, 2020
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Credit loss reserves | $ 124,949 | [1] | $ 123,903 |  |  |
Allowance for credit losses | 1,279 | [1] | 898 | $ 5,752 |  | $ 1,218
Interest income | 19,993 |  | $ 14,641 | $ 9,065 |  |
Cost method investments effective ownership interest |  |  | 1.00% |  |  |
Core Portfolio |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Credit loss reserves | $ 124,949 |  |  |  |  |
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, 2024. |  |  |  |  |
1238 Wisconsin Avenue | Core Portfolio |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Construction commitment | $ 12,800 |  |  |  |  |
Credit loss reserves | 12,800 |  | $ 7,500 |  |  |
Allowance for credit losses | 100 |  | 100 |  |  |
Interest income | $ 200 |  |  |  |  |
1238 Wisconsin Avenue | Core Portfolio | Maximum |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Interest income |  |  | 100 |  |  |
Shoppes at South Hills |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Bridge Loan |  |  | $ 31,700 |  |  |
Mervyns II |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Cost method investments effective ownership, shares |  |  | 4.1 |  | 2.5 |
[1] | The aggregate carrying amount of notes receivable included above for Federal income tax purposes was approximately $126.2 million as of December 31, 2023.

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