v3.26.3
Debt (Narrative) (Details)
ft² in Thousands, $ in Thousands
9 Months Ended
Oct. 20, 2026
USD ($)
ft²
Jun. 01, 2026
USD ($)
Mar. 10, 2026
USD ($)
Feb. 09, 2026
USD ($)
ft²
Feb. 08, 2026
USD ($)
Feb. 04, 2026
USD ($)
Jan. 14, 2026
USD ($)
Jan. 07, 2026
USD ($)
credit_facility
Jan. 06, 2026
USD ($)
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Dec. 10, 2025
USD ($)
Debt Instrument                          
Number of revolving credit facilities | credit_facility               2          
Repayments of long-term debt                   $ 1,415,569 $ 1,900,683    
Long term debt                   $ 2,600,845   $ 2,264,959  
350 Park Avenue | Subsequent Event                          
Debt Instrument                          
Square footage of real estate property (in sqft) | ft² 1,900                        
Mortgages payable                          
Debt Instrument                          
Weighted average interest rate                   5.19%      
Mortgages payable | 350 Park Avenue | Subsequent Event                          
Debt Instrument                          
Debt amount $ 400,000                        
Mortgages payable | 350 Park Avenue | Kenneth C. Griffin (KG)                          
Debt Instrument                          
Debt amount     $ 400,000                    
Mortgages payable | 350 Park Avenue | Kenneth C. Griffin (KG) | Subsequent Event                          
Debt Instrument                          
Repayments of long-term debt $ 400,000                        
Revolving Credit Facility, 2031                          
Debt Instrument                          
Debt amount               $ 1,105,000          
Maximum borrowing capacity           $ 1,130,000              
Basis spread on variable rate           1.01%              
Facility fee (as a percent)           0.24%              
Unsecured Revolving Credit Facility, Maturing December 2027                          
Debt Instrument                          
Maximum borrowing capacity           $ 1,250,000              
Revolving Credit Facility Maturing April 2029                          
Debt Instrument                          
Maximum borrowing capacity               $ 1,000,000 $ 915,000        
Basis spread on variable rate               1.16%          
Facility fee (as a percent)               0.24%          
Unsecured term loan                          
Debt Instrument                          
Debt amount               $ 850,000 $ 800,000        
Basis spread on variable rate               1.15% 1.25%        
Senior Unsecured Notes Due 2033 | Unsecured term loan                          
Debt Instrument                          
Debt amount             $ 500,000            
Stated rate (in percent)             5.75%            
Face amount, percent             99.824%            
Weighted average interest rate             5.78%            
Proceeds from debt             $ 494,000            
Repayments of long-term debt             $ 400,000            
One Park Avenue mortgage loan | Mortgages payable                          
Debt Instrument                          
Basis spread on variable rate       1.78%                  
One Park Avenue Mortgage Loan due March 2026 | Mortgages payable                          
Debt Instrument                          
Basis spread on variable rate         1.22%                
350 Park Avenue | Kenneth C. Griffin (KG)                          
Debt Instrument                          
Long term debt     $ 400,000                    
Senior Unsecured Notes Due 2026 | Unsecured term loan                          
Debt Instrument                          
Stated rate (in percent)   2.15%                      
Repaid of loan   $ 400,000                      
One Park Avenue                          
Debt Instrument                          
Loan balance       $ 525,000 $ 525,000                
Square footage of real estate property (in sqft) | ft²       945                  
350 Park Avenue | Kenneth C. Griffin (KG)                          
Debt Instrument                          
Basis spread on variable rate     4.00%                    
Net rent per annum     $ 16,000                    
Office | 888 Seventh Avenue                          
Debt Instrument                          
Debt amount                         $ 244,543
Office | One Park Avenue                          
Debt Instrument                          
Debt term       5 years