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Investments in Partially Owned Entities (Schedule of Investments) (Details) - USD ($) $ in Thousands | Jun. 30, 2026 | Dec. 31, 2025
--- | --- | ---
Schedule Of Equity Method Investments |  |
Carrying amount of investments in partially owned entities | $ 2,229,224 | $ 1,941,278
Carrying amount of investments in partially owned entities | $ (68,960) | (90,924)
Fifth Avenue and Times Square JV |  |
Schedule Of Equity Method Investments |  |
Interest | 51.50% |
Carrying amount of investments in partially owned entities | $ 1,534,771 | 1,538,141
Partially owned office buildings/land |  |
Schedule Of Equity Method Investments |  |
Carrying amount of investments in partially owned entities | $ 404,863 | 148,958
Alexander's |  |
Schedule Of Equity Method Investments |  |
Interest | 32.40% |
Carrying amount of investments in partially owned entities | $ 80,993 | 47,276
Other investments |  |
Schedule Of Equity Method Investments |  |
Carrying amount of investments in partially owned entities | $ 208,597 | 206,903
7 West 34th Street |  |
Schedule Of Equity Method Investments |  |
Interest | 53.00% |
Carrying amount of investments in partially owned entities | $ (41,895) | (65,726)
85 Tenth Avenue |  |
Schedule Of Equity Method Investments |  |
Interest | 49.90% |
Carrying amount of investments in partially owned entities | $ (27,065) | $ (25,198)

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