Investments	6 Months Ended
Jun. 30, 2026
Equity Method Investments and Joint Ventures [Abstract]
Investments	Investments Structured Investment Program The Company operates a Structured Investment Program (the "SIP"), an investment platform through which the Company provides mezzanine loans or preferred equity to third-party multifamily developers. During the three months ended June 30, 2026, the Company entered into one new SIP commitment, agreeing to provide an aggregate investment of up to $15,000,000 in a multifamily development project in Metro NY/NJ. During the six months ended June 30, 2026, the Company received full repayment of $17,580,000 which includes principal and interest for one mezzanine loan. As of June 30, 2026, the Company had nine commitments to fund up to $241,785,000 in the aggregate with a weighted average rate of return of 11.8% and a weighted average final maturity date of November 2028. As of June 30, 2026, the Company had funded $237,774,000 of these commitments and recognized interest income, exclusive of expected credit losses, of $7,806,000 and $6,689,000 for the three months ended June 30, 2026 and 2025, respectively, and $15,022,000 and $12,820,000 for the six months ended June 30, 2026 and 2025, respectively, from the SIP. Interest income and any change in the expected credit loss are included as a component of Structured Investment Program interest income on the accompanying Condensed Consolidated Statements of Operations. The Company evaluates each SIP commitment to determine the classification as a loan or an investment in a real estate development project. As of June 30, 2026, all of the SIP commitments are classified as loans. The Company includes amounts outstanding under the SIP as a component of prepaid expenses and other assets on the accompanying Condensed Consolidated Balance Sheets. The Company evaluates the credit risk for each commitment on an ongoing basis, estimating the reserve for credit losses using relevant available information from internal and external sources. Market-based historical credit loss data provides the basis for the estimation of expected credit losses, with adjustments, if necessary, for differences in current commitment-specific risk characteristics, such as the amount of equity capital provided by a borrower, amount of senior debt secured by the project, nature of the real estate being developed or other factors. Unconsolidated Investments As of June 30, 2026, the Company had investments in four unconsolidated entities with real estate holdings, with ownership interests ranging from 20.0% to 28.6%, coupled with other unconsolidated investments including third-party property technology and sustainability focused companies and investment management funds. The Arts District joint venture, in which the Company holds a 25% ownership interest, owns one apartment community that is subject to a mortgage loan with an outstanding balance of $162,911,000 as of June 30, 2026. The Company has provided the lender a partial payment guarantee for 25% of the loan's maximum borrowing capacity. Any amounts payable under the 25% loan guarantee by the Company are obligations of the joint venture partners in proportion to their ownership interest, and in the event the Company is obligated to perform under its loan guarantee, its joint venture partner is obligated to reimburse the Company for 75% of amounts paid. The Company accounts for its unconsolidated investments under the equity method of accounting, net asset value or the measurement alternative with the carrying amount of the investment adjusted to fair value when there is an observable transaction for the same or similar investment of the same issuer indicating a change in fair value. The significant accounting policies of the unconsolidated investments are consistent with those of the Company in all material respects. Certain of these investments are subject to various buy‑sell provisions or other rights which are customary in real estate joint venture agreements. The Company and its partners in these entities may initiate these provisions to either sell the Company's interest or acquire the interest from the Company's joint venture partner. Expensed Transaction, Development and Other Pursuit Costs The Company capitalizes costs associated with its development activities to the basis of land held when future development is probable, or if the Company has either not yet acquired the land or if the project is subject to a leasehold interest, the costs are capitalized as deferred development costs ("Development Rights"). Future development of these Development Rights is dependent upon various factors, including zoning and regulatory approval, rental market conditions, construction costs and the availability of capital. Costs incurred for pursuits for which future development is not yet considered probable are expensed as incurred. If the Company determines a Development Right is no longer probable, the Company recognizes any necessary expense to write down its basis. The Company assesses its portfolio of land held for development and land held for investment for impairment if the intent of the Company changes with respect to either the development of, or the expected holding period for, the land. The Company incurred expense of $7,609,000 and $2,493,000 for the three months ended June 30, 2026 and 2025, respectively, and $11,025,000 and $7,237,000 for the six months ended June 30, 2026 and 2025, respectively, for expensed development and other pursuit costs, net of recoveries, which include development pursuits that were not yet probable of future development at the time incurred, or for pursuits that we determined were no longer probable of being developed. The amount for the three and six months ended June 30, 2026 includes a write-off of $4,545,000 for one development opportunity that the Company determined was no longer probable. The amount for the six months ended June 30, 2025 includes a write-off of $3,668,000 for one development opportunity that the Company determined was no longer probable. In addition, the Company incurred costs of $12,367,000 during the three and six months ended June 30, 2026 related to the proposed Merger with Equity Residential. See Note 1, "Organization, Basis of Presentation and Significant Accounting Policies," for more information on the Merger. These costs are included in expensed transaction, development and other pursuit costs, net of recoveries on the accompanying Condensed Consolidated Statements of Operations. These costs can vary greatly, and the costs incurred in any given period may be significantly different in future periods. Long-Lived Assets Casualty Loss For the six months ended June 30, 2026, the Company recognized $4,619,000 of expense from property damage at certain of the Company's communities, reported as casualty and impairment loss on the accompanying Condensed Consolidated Statements of Operations. For the three and six months ended June 30, 2025, the Company recognized $858,000 for the property damage to one of the Company's communities, reported as casualty and impairment loss on the accompanying Condensed Consolidated Statements of Operations. The expense for the six months ended June 30, 2026 relates to damage from a water pipe break at a community in New Jersey and damage at communities throughout the portfolio from winter storms. The expense for the three and six months ended June 30, 2025 relates to damage from a water pipe break at a community in Massachusetts.

The Company operates a Structured Investment Program (the "SIP"), an investment platform through which the Company provides mezzanine loans or preferred equity to third-party multifamily developers. During the three months ended June 30, 2026, the Company entered into one new SIP commitment, agreeing to provide an aggregate investment of up to $15,000,000 in a multifamily development project in Metro NY/NJ. During the six months ended June 30, 2026, the Company received full repayment of $17,580,000 which includes principal and interest for one mezzanine loan. As of June 30, 2026, the Company had nine commitments to fund up to $241,785,000 in the aggregate with a weighted average rate of return of 11.8% and a weighted average final maturity date of November 2028. As of June 30, 2026, the Company had funded $237,774,000 of these commitments and recognized interest income, exclusive of expected credit losses, of $7,806,000 and $6,689,000 for the three months ended June 30, 2026 and 2025, respectively, and $15,022,000 and $12,820,000 for the six months ended June 30, 2026 and 2025, respectively, from the SIP. Interest income and any change in the expected credit loss are included as a component of Structured Investment Program interest income on the accompanying Condensed Consolidated Statements of Operations.

Balance Sheets. The Company evaluates the credit risk for each commitment on an ongoing basis, estimating the reserve for credit losses using relevant available information from internal and external sources. Market-based historical credit loss data provides the basis for the estimation of expected credit losses, with adjustments, if necessary, for differences in current commitment-specific risk characteristics, such as the amount of equity capital provided by a borrower, amount of senior debt secured by the project, nature of the real estate being developed or other factors.

The Arts District joint venture, in which the Company holds a 25% ownership interest, owns one apartment community that is subject to a mortgage loan with an outstanding balance of $162,911,000 as of June 30, 2026. The Company has provided the lender a partial payment guarantee for 25% of the loan's maximum borrowing capacity. Any amounts payable under the 25% loan guarantee by the Company are obligations of the joint venture partners in proportion to their ownership interest, and in the event the Company is obligated to perform under its loan guarantee, its joint venture partner is obligated to reimburse the Company for 75% of amounts paid.

The Company accounts for its unconsolidated investments under the equity method of accounting, net asset value or the measurement alternative with the carrying amount of the investment adjusted to fair value when there is an observable transaction for the same or similar investment of the same issuer indicating a change in fair value. The significant accounting policies of the unconsolidated investments are consistent with those of the Company in all material respects. Certain of these investments are subject to various buy‑sell provisions or other rights which are customary in real estate joint venture agreements. The Company and its partners in these entities may initiate these provisions to either sell the Company's interest or acquire the interest from the Company's joint venture partner.

The Company capitalizes costs associated with its development activities to the basis of land held when future development is probable, or if the Company has either not yet acquired the land or if the project is subject to a leasehold interest, the costs are capitalized as deferred development costs ("Development Rights"). Future development of these Development Rights is dependent upon various factors, including zoning and regulatory approval, rental market conditions, construction costs and the availability of capital. Costs incurred for pursuits for which future development is not yet considered probable are expensed as incurred. If the Company determines a Development Right is no longer probable, the Company recognizes any necessary expense to write down its basis. The Company assesses its portfolio of land held for development and land held for investment for impairment if the intent of the Company changes with respect to either the development of, or the expected holding period for, the land. The Company incurred expense of $7,609,000 and $2,493,000 for the three months ended June 30, 2026 and 2025, respectively, and $11,025,000 and $7,237,000 for the six months ended June 30, 2026 and 2025, respectively, for expensed development and other pursuit costs, net of recoveries, which include development pursuits that were not yet probable of future development at the time incurred, or for pursuits that we determined were no longer probable of being developed. The amount for the three and six months ended June 30, 2026 includes a write-off of $4,545,000 for one development opportunity that the Company determined was no longer probable. The amount for the six months ended June 30, 2025 includes a write-off of $3,668,000 for one development opportunity that the Company determined was no longer probable. In addition, the Company incurred costs of $12,367,000 during the three and six months ended June 30, 2026 related to the proposed Merger with Equity Residential. See Note 1, "Organization, Basis of Presentation and Significant Accounting Policies," for more information on the Merger. These costs are included in expensed transaction, development and other pursuit costs, net of recoveries on the accompanying Condensed Consolidated Statements of Operations. These costs can vary greatly, and the costs incurred in any given period may be significantly different in future periods.

For the six months ended June 30, 2026, the Company recognized $4,619,000 of expense from property damage at certain of the Company's communities, reported as casualty and impairment loss on the accompanying Condensed Consolidated Statements of Operations. For the three and six months ended June 30, 2025, the Company recognized $858,000 for the property damage to one of the Company's communities, reported as casualty and impairment loss on the accompanying Condensed Consolidated Statements of Operations. The expense for the six months ended June 30, 2026 relates to damage from a water pipe break at a community in New Jersey and damage at communities throughout the portfolio from winter storms. The expense for the three and six months ended June 30, 2025 relates to damage from a water pipe break at a community in Massachusetts.