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Investments in and Advances to Unconsolidated Affiliates - Schedule of Investments (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Feb. 28, 2025 | Jan. 23, 2025 | Jan. 22, 2025 | Dec. 31, 2024 | Sep. 25, 2024
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Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Due from Related Parties |  | $ 6,155 |  |  |  | $ 2,523 |
Other | [1] | 3,716 |  |  |  | 4,540 |
Investments in and advances to unconsolidated affiliates |  | 172,418 |  |  |  | 209,232 |
Distributions in excess of income from, and investments in, unconsolidated affiliates |  | 17,223 |  |  |  | 16,514 |
Related Party |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Due from Related Parties |  | $ 1,419 |  |  |  | 446 |
840 N. Michigan Avenue |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage |  |  | 2.50% |  |  |  |
Renaissance Portfolio |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage |  |  |  | 48.00% | 20.00% |  |
Equity method investments |  |  |  | $ 245,700 |  |  |
Fund IV |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage |  | 23.12% |  |  |  |  |
Fund V |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage |  | 20.10% |  |  |  |  | 90.00%
Core Portfolio |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investments |  | $ 82,881 |  |  |  | 110,184 |
Core Portfolio | Renaissance Portfolio |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage | [2] | 68.00% |  |  |  |  |
Equity method investments | [2] | $ 0 |  |  |  | 28,250 |
Core Portfolio | Gotham Plaza |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage |  | 49.00% |  |  |  |  |
Equity method investments |  | $ 30,384 |  |  |  | 30,561 |
Core Portfolio | Georgetown Portfolio |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage | [3] | 50.00% |  |  |  |  |
Equity method investments | [3] | $ 3,831 |  |  |  | 4,214 |
Core Portfolio | 1238 Wisconsin Avenue |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage | [3],[4] | 80.00% |  |  |  |  |
Equity method investments | [3],[4] | $ 18,365 |  |  |  | 19,048 |
Core Portfolio | Crossroads |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage | [5] | 49.00% |  |  |  |  |
Distributions in excess of income from, and investments in, unconsolidated affiliates | [5] | $ 17,223 |  |  |  | 16,514 |
Core Portfolio | 840 N. Michigan |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage | [6],[7] | 94.35% |  |  |  |  |
Equity method investments | [6],[7] | $ 30,301 |  |  |  | 28,111 |
Investment Management | Fund IV Other Portfolio |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage | [8],[9] | 90.00% |  |  |  |  |
Equity method investments | [8],[9] | $ 3,531 |  |  |  | 5,291 |
Investment Management | 650 Bald Hill Road |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage | [9] | 90.00% |  |  |  |  |
Equity method investments | [9] | $ 9,063 |  |  |  | 9,220 |
Investment Management | Fund IV |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investments | [9] | $ 12,594 |  |  |  | 14,511 |
Investment Management | Fund V Family Center at Riverdale |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage | [7],[9] | 89.42% |  |  |  |  |
Equity method investments | [7],[9] | $ 755 |  |  |  | 1,832 |
Investment Management | Tri City Plaza |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage | [9] | 90.00% |  |  |  |  |
Equity method investments | [9] | $ 6,252 |  |  |  | 6,914 |
Investment Management | Frederick County Acquisitions |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage | [9],[10] | 90.00% |  |  |  |  |
Equity method investments | [9],[10] | $ 4,919 |  |  |  | 4,375 |
Investment Management | Wood Ridge Plaza |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage | [9] | 90.00% |  |  |  |  |
Equity method investments | [9] | $ 8,475 |  |  |  | 9,313 |
Investment Management | La Frontera Village |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage | [9] | 90.00% |  |  |  |  |
Equity method investments | [9] | $ 11,693 |  |  |  | 13,389 |
Investment Management | Shoppes at South Hills |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage | [9] | 90.00% |  |  |  |  |
Equity method investments | [9] | $ 9,193 |  |  |  | 10,139 |
Investment Management | Mohawk Commons |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage | [9] | 90.00% |  |  |  |  |
Equity method investments | [9] | $ 9,938 |  |  |  | 12,350 |
Investment Management | Fund V |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investments | [9] | $ 51,225 |  |  |  | 58,312 |
Investment Management | Shops at Grand |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage |  | 5.00% |  |  |  |  |
Equity method investments |  | $ 2,378 |  |  |  | 2,452 |
Investment Management | Walk at Highwoods Preserve |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage |  | 20.00% |  |  |  |  |
Equity method investments |  | $ 1,997 |  |  |  | 2,279 |
Investment Management | LINQ Promenade |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage |  | 15.00% |  |  |  |  |
Equity method investments |  | $ 16,208 |  |  |  | 16,508 |
Investment Management | Other |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investments |  | $ 20,583 |  |  |  | $ 21,239 |
[1] | Includes cost-method investment in Fifth Wall. The Company recorded an impairment charge of $0.4 million for the six months ended June 30, 2025, which is included in Realized and unrealized holding gains (losses) on investments and other in the Company’s Condensed Consolidated Statements of Operations.
[2] | 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 Core Portfolio effective January 23, 2025. Accordingly, the Company recognized a loss on change in control of $9.6 million (Note 2).
[3] | Represents a VIE for which the Company is not the primary beneficiary (Note 15).
[4] | 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 June 30, 2025 and December 31, 2024 the related party note receivable had a principal balance of $12.8 million, net of a $0.1 million 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 six months ended June 30, 2025 and 2024, respectively, related to this note receivable.
[5] | Distributions have exceeded the Company’s investment; however, the Company recognizes a liability balance as it may elect to contribute capital to the entity.
[6] | In February 2025, the Company acquired an additional 2.5% interest in the 840 North Michigan Avenue venture increasing its ownership interest from 91.85% to 94.35%. The note receivable from the 840 North Michigan Avenue venture partners had a balance of $1.5 million and $2.3 million as of June 30, 2025 and December 31, 2024 respectively and matures in July 2025 (Note 3).
[7] | Represents a tenancy-in-common interest.
[8] | As of June 30, 2025, the investment balance relates to undistributed proceeds from the disposition of the Eden Square property. These proceeds were distributed to Fund IV in July 2025.
[9] | The Company owns 23.12% and 20.10% in Funds IV and V, respectively (Note 1). For the ventures within these funds, the ownership interest percentage represents the Fund’s ownership interest and not the Company’s proportionate share.
[10] | On September 25, 2024 the venture which Fund V holds a 90% interest in sold a 300,000 square foot property in Frederick County, Maryland commonly referred to as Frederick Crossing. Fund V maintains its 90% interest in the venture which retains its interest in the remaining property of the Frederick County Acquisitions portfolio, commonly referred to as Frederick County Square.

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