v3.25.2
Fair Value Measurements (Schedule of Derivative Instruments) (Details) - USD ($)
$ in Thousands
 1 Months Ended
Jul. 16, 2025
May 31, 2027
May 31, 2026
Jul. 15, 2025
Jun. 30, 2025
Dec. 31, 2024
Derivative [Line Items]            
Long term debt         $ 2,118,231 $ 2,566,862
Forecast            
Derivative [Line Items]            
Basis spread on variable rate (in percent)   2.55% 2.30%      
PENN 11 | Subsequent Event            
Derivative [Line Items]            
All-In Swapped Rate 6.28%          
Debt amount       $ 500,000    
Basis spread on variable rate (in percent) 2.06%          
Office | PENN 11 | Subsequent Event            
Derivative [Line Items]            
Debt amount $ 450,000          
Unsecured term loan | Interest Rate Swaps            
Derivative [Line Items]            
Debt amount         100,000  
One Park Avenue mortgage loan | Interest Rate Swaps            
Derivative [Line Items]            
Debt amount         500,000  
4 Union Square South mortgage loan | Interest Rate Swaps            
Derivative [Line Items]            
Debt amount         $ 100,000  
Matures in May 2028 | 555 California Street | Office            
Derivative [Line Items]            
Equity method ownership percentage (as percent)         70.00% 70.00%
Debt amount         $ 1,200,000 $ 1,200,000
770 Broadway mortgage loan | Interest Rate Swaps            
Derivative [Line Items]            
Notional amount and swapped balance         700,000  
Designated as Hedging Instrument            
Derivative [Line Items]            
Fair Value Asset         36,115 88,982
Fair Value Liability         $ 3,669 1,023
Designated as Hedging Instrument | Interest Rate Swaps            
Derivative [Line Items]            
Unswapped Balance interest rate         1.25%  
Designated as Hedging Instrument | In-place swap | Interest Rate Swaps            
Derivative [Line Items]            
Notional amount and swapped balance         $ 840,000  
All-In Swapped Rate         6.03%  
Fair Value Asset         $ 0 765
Fair Value Liability         862 0
Designated as Hedging Instrument | Forward swap | Interest Rate Swaps            
Derivative [Line Items]            
Notional amount and swapped balance         $ 840,000  
All-In Swapped Rate         5.56%  
Fair Value Asset         $ 0 0
Fair Value Liability         2,272 0
Designated as Hedging Instrument | Unsecured term loan | Interest Rate Swaps            
Derivative [Line Items]            
Notional amount and swapped balance         $ 800,000  
All-In Swapped Rate         4.40%  
Fair Value Asset         $ 5,958 13,494
Fair Value Liability         0 0
Designated as Hedging Instrument | Unsecured revolving credit facility | Interest Rate Swaps            
Derivative [Line Items]            
Notional amount and swapped balance         $ 575,000  
All-In Swapped Rate         3.84%  
Fair Value Asset         $ 8,278 18,510
Fair Value Liability         0 0
Designated as Hedging Instrument | One Park Avenue mortgage loan | Interest Rate Swaps            
Derivative [Line Items]            
Notional amount and swapped balance         $ 500,000  
All-In Swapped Rate         3.95%  
Fair Value Asset         $ 6,886 15,243
Fair Value Liability         0 0
Long term debt         $ 25,000  
Derivative, basis spread on variable rate         1.22%  
Variable interest rate         5.53%  
Cap strike rate         4.39%  
Designated as Hedging Instrument | PENN 11 mortgage loan | Interest Rate Swaps            
Derivative [Line Items]            
Notional amount and swapped balance         $ 500,000  
All-In Swapped Rate         6.28%  
Fair Value Asset         $ 88 17
Fair Value Liability         6 282
Designated as Hedging Instrument | 100 West 33rd Street mortgage loan | Interest Rate Swaps            
Derivative [Line Items]            
Notional amount and swapped balance         $ 480,000  
All-In Swapped Rate         5.26%  
Fair Value Asset         $ 423 6,808
Fair Value Liability         0 0
Designated as Hedging Instrument | 888 Seventh Avenue mortgage loan | Interest Rate Swaps            
Derivative [Line Items]            
Notional amount and swapped balance         $ 200,000  
All-In Swapped Rate         4.76%  
Fair Value Asset         $ 1,890 5,249
Fair Value Liability         0 0
Long term debt         $ 49,824  
Derivative, basis spread on variable rate         1.80%  
Variable interest rate         6.12%  
Designated as Hedging Instrument | 4 Union Square South mortgage loan | Interest Rate Swaps            
Derivative [Line Items]            
Notional amount and swapped balance         $ 100,000  
All-In Swapped Rate         4.37%  
Fair Value Asset         $ 1,110 2,735
Fair Value Liability         0 0
Long term debt         $ 20,000  
Derivative, basis spread on variable rate         1.50%  
Variable interest rate         5.82%  
Designated as Hedging Instrument | 435 Seventh Avenue mortgage loan | Interest Rate Swaps            
Derivative [Line Items]            
Notional amount and swapped balance         $ 75,000  
All-In Swapped Rate         6.96%  
Fair Value Asset         $ 0 0
Fair Value Liability         529 741
Designated as Hedging Instrument | 1290 Avenue of the Americas mortgage loan | Interest Rate Cap            
Derivative [Line Items]            
Notional amount and swapped balance         950,000  
Fair Value Asset         11,469 25,673
Fair Value Liability         $ 0 0
Cap strike rate         1.00%  
Designated as Hedging Instrument | Various mortgage loans | Interest Rate Cap            
Derivative [Line Items]            
Fair Value Asset         $ 13 488
Fair Value Liability         0 $ 0
Designated as Hedging Instrument | Unsecured Term Loan Expiring July 2025 | Interest Rate Swaps            
Derivative [Line Items]            
Notional amount and swapped balance         $ 800,000  
All-In Swapped Rate         4.40%  
Unswapped Balance         $ 0  
Designated as Hedging Instrument | Unsecured Term Loan Expiring October 2026 | Interest Rate Swaps            
Derivative [Line Items]            
Notional amount and swapped balance         $ 650,000  
All-In Swapped Rate         4.24%  
Unswapped Balance         $ 150,000  
Designated as Hedging Instrument | Unsecured Term Loan Expiring July 2027 | Interest Rate Swaps            
Derivative [Line Items]            
Notional amount and swapped balance         $ 150,000  
All-In Swapped Rate         3.90%  
Unswapped Balance         $ 650,000  
Designated as Hedging Instrument | Unsecured Term Loan Expiring August 2027 | Interest Rate Swaps            
Derivative [Line Items]            
Notional amount and swapped balance         $ 50,000  
All-In Swapped Rate         3.99%  
Unswapped Balance         $ 750,000