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Investments in and Advances to Real Estate Joint Ventures - Joint Venture Investments Accounted for Under the Equity Method, Debt Details (Details) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
Schedule of Equity Method Investments [Line Items] |  |  |
Mortgage and notes payable |  | $ 1,433.7 | $ 1,473.7
Prudential Investment Program [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Mortgage and notes payable |  | $ 234.4 | $ 268.5
Weighted average interest rate |  | 5.54% | 5.47%
Weighted average remaining term (Month) | [1] | 25 months 6 days | 19 months 18 days
KIR [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Mortgage and notes payable |  | $ 274.2 | $ 273.9
Weighted average interest rate |  | 4.70% | 5.82%
Weighted average remaining term (Month) | [1] | 18 months 6 days | 27 months 6 days
R2G Venture LLC [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Mortgage and notes payable |  | $ 70.2 | $ 68.7
Weighted average interest rate |  | 2.90% | 2.90%
Weighted average remaining term (Month) | [1] | 65 months 21 days | 74 months 18 days
CPP [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Mortgage and notes payable |  | $ 79.6 | $ 80.6
Weighted average interest rate |  | 5.25% | 4.88%
Weighted average remaining term (Month) | [1] | 10 months | 19 months
Other Institutional Joint Ventures [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Mortgage and notes payable |  | $ 235.2 | $ 234.7
Weighted average interest rate |  | 5.31% | 5.76%
Weighted average remaining term (Month) | [1] | 14 months 21 days | 23 months 21 days
Other Joint Venture Programs [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Mortgage and notes payable |  | $ 540.1 | $ 547.3
Weighted average interest rate |  | 4.99% | 4.98%
Weighted average remaining term (Month) | [1] | 33 months 21 days | 40 months 24 days
[1] | Includes extension options

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