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Investments in and Advances to Unconsolidated Affiliates - Schedule of Investments (Parenthetical) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Feb. 28, 2025 | Jan. 23, 2025 | Jan. 22, 2025 | Dec. 31, 2024 | Sep. 25, 2024 | Dec. 31, 2023
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Note receivable from related party |  | $ 154,765 |  | $ 154,765 |  |  |  |  | $ 126,584 |  |
Allowance for credit losses |  | 1,692 |  | 1,692 |  |  |  |  | 2,004 |  | $ 1,279
Interest income |  | 6,121 | $ 7,859 | 18,575 | $ 18,510 |  |  |  |  |  |
Impairment charge |  | 200 |  | 600 |  |  |  |  |  |  |
Equity in (losses) earnings of unconsolidated affiliates |  | (3,694) | 11,784 | $ (9,598) | 15,952 |  |  |  |  |  |
1238 Wisconsin Avenue |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Description of Variable Rate Basis |  |  |  | The loan is secured by the venture members’ equity interest in the entity that owns the 1238 Wisconsin development property, bears interest at Prime + 1.0% (subject to a 4.5% floor), and matures on December 28, 2027. |  |  |  |  |  |  |
1238 Wisconsin Avenue | REIT Portfolio |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Construction commitment |  | 12,800 |  | $ 12,800 |  |  |  |  |  |  |
Note receivable from related party |  | 12,800 |  | 12,800 |  |  |  |  | 12,800 |  |
Allowance for credit losses |  | 100 |  | 100 |  |  |  |  | 100 |  |
Interest income |  | $ 100 | $ 100 | $ 100 | $ 100 |  |  |  |  |  |
Equity method investment, ownership percentage | [1],[2] | 80.00% |  | 80.00% |  |  |  |  |  |  |
840 N. Michigan Avenue |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Note receivable from related party |  | $ 1,600 |  | $ 1,600 |  |  |  |  | $ 2,300 |  |
Equity method investment, ownership percentage |  |  |  |  |  | 2.50% |  |  |  |  |
Note receivable maturity date |  |  |  | Jul. 31, 2025 |  |  |  |  |  |  |
840 N. Michigan Avenue | Maximum |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  |  |  |  |  | 94.35% |  |  |  |  |
840 N. Michigan Avenue | Minimum |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  |  |  |  |  | 91.85% |  |  |  |  |
Renaissance Portfolio |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  |  |  |  |  |  | 48.00% | 20.00% |  |  |
Equity method investment, loss on change in control |  | $ 9,600 |  | $ 9,600 |  |  |  |  |  |  |
Renaissance Portfolio | Maximum |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  | 100.00% |  | 100.00% |  |  | 68.00% |  |  |  |
Renaissance Portfolio | Minimum |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  |  |  |  |  |  | 20.00% |  |  |  |
Renaissance Portfolio | REIT Portfolio |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage | [3] | 68.00% |  | 68.00% |  |  |  |  |  |  |
Equity method investment, loss on change in control |  |  |  |  |  |  | $ 9,600 |  |  |  |
Frederick Crossing |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  |  |  |  |  |  |  |  |  | 90.00% |
Fund IV |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  | 23.12% |  | 23.12% |  |  |  |  |  |  |
Fund V |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  | 20.10% |  | 20.10% |  |  |  |  |  | 90.00% |
650 Bald Hill Road |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment charge |  |  |  | $ 3,500 |  |  |  |  |  |  |
Equity in (losses) earnings of unconsolidated affiliates |  |  |  | $ 700 |  |  |  |  |  |  |
[1] | Includes the amounts advanced against a $12.8 million construction commitment from the Company to the venture that holds its investment in 1238 Wisconsin. As of September 30, 2025 and December 31, 2024 the related party note receivable had a principal balance o f $12.8 million, net of a $0.1 m illion allowance for each period. The loan is secured by the venture members’ equity interest in the entity that owns the 1238 Wisconsin development property, bears interest at Prime + 1.0% (subject to a 4.5% floor), and matures on December 28, 2027. The Company recognized interest income of $0.1 million for each of the three and nine month periods ended September 30, 2025 and 2024, respectively, related to this note receivable.
[2] | Represents a VIE for which the Company is not the primary beneficia ry (Note 15).
[3] | On January 23, 2025, the Company acquired an additional 48% economic ownership interest, and increased its existing 20% interest to 68%, in the Renaissance Portfolio primarily located in Washington D.C. Prior to the acquisition, the Company accounted for its 20% interest under the equity method of accounting. Due to the Company gaining a controlling financial interest as a result of this acquisition, the Company concluded that the entity is a variable interest entity (“VIE”) and that it is the primary beneficiary, and it should consolidate its investment within its REIT Portfolio segment effective January 23, 2025. Accordingly, the Company recognized a loss on change in control of $9.6 million (Note 2).

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