v3.26.3
Mortgages and Other Loans Payable - Schedule of Mortgages and Other Loans Payable (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Debt Instrument [Line Items]    
Total fixed rate debt $ 2,159,386 $ 2,075,222
Total floating rate debt 57,413 79,277
Total mortgages and other loans payable 2,216,799 2,154,499
Deferred financing costs, net of amortization (14,032) (8,450)
Mortgages and other loans payable, net 2,202,767 2,146,049
100 Church Street    
Debt Instrument [Line Items]    
Total fixed rate debt 365,000 365,000
Landmark Square    
Debt Instrument [Line Items]    
Total fixed rate debt 100,000 100,000
485 Lexington Avenue    
Debt Instrument [Line Items]    
Total fixed rate debt 450,000 450,000
315 West 33rd Street    
Debt Instrument [Line Items]    
Total fixed rate debt 250,000 250,000
500 Park Avenue    
Debt Instrument [Line Items]    
Total fixed rate debt 80,000 80,000
800 Third Avenue    
Debt Instrument [Line Items]    
Total fixed rate debt 177,000 177,000
610 Park Avenue    
Debt Instrument [Line Items]    
Total fixed rate debt 12,200 0
65 East 55th Street - Park Avenue Tower    
Debt Instrument [Line Items]    
Total fixed rate debt 480,000 0
420 Lexington Avenue    
Debt Instrument [Line Items]    
Total fixed rate debt 245,186 258,523
7 Dey Street    
Debt Instrument [Line Items]    
Total fixed rate debt 0 190,149
10 East 53rd Street    
Debt Instrument [Line Items]    
Total fixed rate debt 0 204,550
Fund subscription line    
Debt Instrument [Line Items]    
Total floating rate debt 57,413 $ 79,277
Maximum facility capacity $ 200,000  
Weighted Average | 100 Church Street    
Debt Instrument [Line Items]    
Interest rate, fixed rate debt (as a percent) 5.89%  
Weighted Average | Landmark Square    
Debt Instrument [Line Items]    
Interest rate, fixed rate debt (as a percent) 4.90%  
Weighted Average | 485 Lexington Avenue    
Debt Instrument [Line Items]    
Interest rate, fixed rate debt (as a percent) 4.25%  
Weighted Average | 315 West 33rd Street    
Debt Instrument [Line Items]    
Interest rate, fixed rate debt (as a percent) 4.24%  
Weighted Average | 500 Park Avenue    
Debt Instrument [Line Items]    
Interest rate, fixed rate debt (as a percent) 6.57%  
Weighted Average | 800 Third Avenue    
Debt Instrument [Line Items]    
Interest rate, fixed rate debt (as a percent) 5.15%  
Weighted Average | 610 Park Avenue    
Debt Instrument [Line Items]    
Interest rate, fixed rate debt (as a percent) 4.65%  
Weighted Average | 65 East 55th Street - Park Avenue Tower    
Debt Instrument [Line Items]    
Interest rate, fixed rate debt (as a percent) 5.30%  
Weighted Average | 420 Lexington Avenue    
Debt Instrument [Line Items]    
Interest rate, fixed rate debt (as a percent) 8.24%  
Weighted Average | 7 Dey Street    
Debt Instrument [Line Items]    
Interest rate, fixed rate debt (as a percent)  
Weighted Average | 10 East 53rd Street    
Debt Instrument [Line Items]    
Interest rate, fixed rate debt (as a percent)  
Weighted Average | Fund subscription line    
Debt Instrument [Line Items]    
Interest rate, floating rate debt (as a percent) 2.20%