v3.25.2
Investments in Partially Owned Entities (Schedule of Income (Loss)) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Schedule Of Equity Method Investments        
Equity in net income     $ 113,648 $ 64,228
Return on preferred equity, net of our share of the expense     54,205 54,618
Our share of net income (loss) $ 16,671 $ 47,949 $ 113,648 64,228
Fifth Avenue and Times Square JV        
Schedule Of Equity Method Investments        
Interest 51.50%   51.50%  
Equity in net income $ 3,649 10,427 $ 9,486 19,718
Return on preferred equity, net of our share of the expense 6,503 10,258 15,046 19,586
Net gain on sale 0 0 76,162 0
Our share of net income (loss) $ 10,152 20,685 $ 100,694 39,304
Alexander's        
Schedule Of Equity Method Investments        
Interest 32.40%   32.40%  
Equity in net income $ 1,919 2,649 $ 5,842 7,803
Management, leasing and development fees 1,406 1,185 3,039 2,365
Our share of net income (loss) 3,325 3,834 8,881 10,168
Partially owned office buildings        
Schedule Of Equity Method Investments        
Our share of net income (loss) (2,355) 21,297 (5,977) 10,894
Other investments        
Schedule Of Equity Method Investments        
Our share of net income (loss) $ 5,549 2,133 $ 10,050 3,862
280 Park Avenue Mezzanine Loan        
Schedule Of Equity Method Investments        
Gain on extinguishment of debt   $ 31,215   $ 31,215