v3.26.3
Fair Value Measurements (Schedule of Derivative Instruments) (Details) - USD ($)
$ in Thousands
 1 Months Ended 9 Months Ended
Jan. 07, 2026
Jan. 06, 2026
May 31, 2027
Nov. 30, 2026
Sep. 30, 2026
Oct. 31, 2026
Sep. 29, 2026
Apr. 05, 2026
Dec. 31, 2025
Derivative [Line Items]                  
Long term debt         $ 2,600,845       $ 2,264,959
Designated as a Hedge                  
Derivative [Line Items]                  
Fair Value Asset         $ 44,051       13,985
Fair Value Liability                 3,093
Swapped Balance | Designated as a Hedge                  
Derivative [Line Items]                  
Basis spread on variable rate         1.15%        
555 California Street mortgage loan | Office | 555 California Street                  
Derivative [Line Items]                  
Percentage share of mortgage loan         70.00%        
Debt amount         $ 1,200,000        
555 California Street mortgage loan | Swapped Balance | Designated as a Hedge                  
Derivative [Line Items]                  
Notional amount and swapped balance         $ 840,000        
All-In Swapped Rate         5.56%        
Fair Value Asset         $ 17,365       0
Fair Value Liability                 2,119
Unsecured term loan                  
Derivative [Line Items]                  
Debt amount $ 850,000 $ 800,000              
Basis spread on variable rate 1.15% 1.25%              
Unsecured term loan | Swapped Balance | Designated as a Hedge                  
Derivative [Line Items]                  
Notional amount and swapped balance         $ 750,000        
All-In Swapped Rate         4.12%        
Fair Value Asset         $ 3,519       3,522
Fair Value Liability                 0
Debt amount         850,000        
Unsecured term loan | Swapped Balance | Designated as a Hedge | Subsequent Event                  
Derivative [Line Items]                  
Floating balance           $ 100,000      
Derivative, notional amount           $ 500,000      
Cap strike rate           4.75%      
Unsecured term loan | Capped Balance | Designated as a Hedge                  
Derivative [Line Items]                  
Notional amount and swapped balance         600,000        
Fair Value Asset         1,271       0
Fair Value Liability                 0
Unsecured revolving credit facilities | Swapped Balance | Designated as a Hedge                  
Derivative [Line Items]                  
Notional amount and swapped balance         $ 575,000        
All-In Swapped Rate         3.74%        
Fair Value Asset         $ 8,728       5,208
Fair Value Liability                 0
Derivative, notional amount         575,000        
Cap strike rate             4.75%    
Line of credit outstanding amount         918,000        
Line of credit borrowing capacity             $ 343,000    
Unsecured revolving credit facilities | Capped Balance | Designated as a Hedge                  
Derivative [Line Items]                  
Notional amount and swapped balance         343,000        
Fair Value Asset         728       0
Fair Value Liability                 0
One Park Avenue mortgage loan | Swapped Balance | Designated as a Hedge                  
Derivative [Line Items]                  
Notional amount and swapped balance         $ 500,000        
All-In Swapped Rate         4.52%        
Fair Value Asset         $ 6,112       4,189
Fair Value Liability                 0
Long term debt         $ 25,000        
Cap strike rate         5.20%        
Derivative, basis spread on variable rate         1.78%        
Variable interest rate         5.60%        
100 West 33rd Street mortgage loan | Swapped Balance | Designated as a Hedge                  
Derivative [Line Items]                  
Notional amount and swapped balance         $ 480,000        
All-In Swapped Rate         5.26%        
Fair Value Asset         $ 3,164       0
Fair Value Liability                 736
1290 Avenue of the Americas mortgage loan | Swapped Balance | Designated as a Hedge                  
Derivative [Line Items]                  
Notional amount and swapped balance         $ 200,000        
All-In Swapped Rate         4.58%        
Fair Value Asset         $ 2,627       1,047
Fair Value Liability                 0
Long term debt         $ 750,000        
Cap strike rate         4.00%        
Derivative, basis spread on variable rate         1.62%        
Variable interest rate         5.44%        
435 Seventh Avenue mortgage loan | Swapped Balance | Designated as a Hedge                  
Derivative [Line Items]                  
Fair Value Asset         $ 0       0
Fair Value Liability                 238
Derivative, notional amount               $ 75,000  
Various mortgage loans | Capped Balance | Designated as a Hedge                  
Derivative [Line Items]                  
Fair Value Asset         537       19
Fair Value Liability                 $ 0
555 California Street, Forward Swap | Forecast                  
Derivative [Line Items]                  
Basis spread on variable rate     0.25% 0.25%          
Unsecured Term Loan Expiring October 2026 | Swapped Balance | Designated as a Hedge                  
Derivative [Line Items]                  
Notional amount and swapped balance         $ 750,000        
All-In Swapped Rate         4.12%        
Floating balance         $ 100,000        
Unsecured Term Loan Expiring October 2026 | Capped Balance | Designated as a Hedge                  
Derivative [Line Items]                  
Notional amount and swapped balance         0        
Unsecured Term Loan Expiring July 2027 | Swapped Balance | Designated as a Hedge                  
Derivative [Line Items]                  
Notional amount and swapped balance         $ 250,000        
All-In Swapped Rate         3.89%        
Floating balance         $ 0        
Unsecured Term Loan Expiring July 2027 | Capped Balance | Designated as a Hedge                  
Derivative [Line Items]                  
Notional amount and swapped balance         600,000        
Unsecured Term Loan Expiring August 2027 | Swapped Balance | Designated as a Hedge                  
Derivative [Line Items]                  
Notional amount and swapped balance         $ 50,000        
All-In Swapped Rate         3.89%        
Floating balance         $ 200,000        
Unsecured Term Loan Expiring August 2027 | Capped Balance | Designated as a Hedge                  
Derivative [Line Items]                  
Notional amount and swapped balance         600,000        
Unsecured Term Loan Expiring October 2027 | Swapped Balance | Designated as a Hedge                  
Derivative [Line Items]                  
Notional amount and swapped balance         $ 0        
All-In Swapped Rate         0.00%        
Floating balance         $ 250,000        
Unsecured Term Loan Expiring October 2027 | Capped Balance | Designated as a Hedge                  
Derivative [Line Items]                  
Notional amount and swapped balance         $ 600,000