v3.25.4
Debt - Schedule of Debt (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 08, 2024
Dec. 31, 2025
Dec. 18, 2025
Mar. 27, 2025
Dec. 31, 2024
Debt Instrument [Line Items]          
Outstanding borrowings   $ 145,000     $ 120,000
Total principal   2,389,011      
Deferred financing costs, net   (18,617)     (18,977)
Revolving Credit Facility          
Debt Instrument [Line Items]          
Basis spread on variable rate (as a percent) 0.10%        
Mortgages, Senior Notes, and Unsecured Term Loan Facilities, not Including Unsecured Revolving Credit Facility          
Debt Instrument [Line Items]          
Total principal   2,389,011     2,294,274
Deferred financing costs, net   (11,878)     (10,123)
Unamortized debt discount   (5,402)     (6,183)
Total   2,371,731     2,277,968
10 Union Square | Fixed rate mortgage debt:          
Debt Instrument [Line Items]          
Fixed rate mortgage debt:   $ 50,000     50,000
Stated rate (as a percent)   3.70%      
Effective Rate (as a percent)   3.97%      
1542 Third Avenue | Fixed rate mortgage debt:          
Debt Instrument [Line Items]          
Fixed rate mortgage debt:   $ 30,000     30,000
Stated rate (as a percent)   4.29%      
Effective Rate (as a percent)   4.53%      
1010 Third Avenue and 77 West 55th Street | Fixed rate mortgage debt:          
Debt Instrument [Line Items]          
Fixed rate mortgage debt:   $ 33,102     34,048
Stated rate (as a percent)   4.01%      
Effective Rate (as a percent)   4.21%      
Metro Center | Fixed rate mortgage debt:          
Debt Instrument [Line Items]          
Fixed rate mortgage debt:   $ 0     71,600
Stated rate (as a percent)   0.00%      
Effective Rate (as a percent)   0.00%      
250 West 57th Street | Fixed rate mortgage debt:          
Debt Instrument [Line Items]          
Fixed rate mortgage debt:   $ 180,000     180,000
Stated rate (as a percent)   2.83%      
Effective Rate (as a percent)   3.21%      
1333 Broadway | Fixed rate mortgage debt:          
Debt Instrument [Line Items]          
Fixed rate mortgage debt:   $ 160,000     160,000
Stated rate (as a percent)   4.21%      
Effective Rate (as a percent)   4.29%      
345 East 94th Street - Series A | Fixed rate mortgage debt:          
Debt Instrument [Line Items]          
Fixed rate mortgage debt:   $ 43,600     43,600
Variable rate, effective percentage (as a percent)   70.00%      
Basis spread on variable rate (as a percent)   0.95%      
Effective Rate (as a percent)   3.56%      
345 East 94th Street - Series B | Fixed rate mortgage debt:          
Debt Instrument [Line Items]          
Fixed rate mortgage debt:   $ 5,704     6,490
Basis spread on variable rate (as a percent)   2.24%      
Effective Rate (as a percent)   3.56%      
561 10th Avenue - Series A | Fixed rate mortgage debt:          
Debt Instrument [Line Items]          
Fixed rate mortgage debt:   $ 114,500     114,500
Variable rate, effective percentage (as a percent)   70.00%      
Basis spread on variable rate (as a percent)   1.07%      
Effective Rate (as a percent)   3.85%      
561 10th Avenue - Series B | Fixed rate mortgage debt:          
Debt Instrument [Line Items]          
Fixed rate mortgage debt:   $ 12,105     14,036
Basis spread on variable rate (as a percent)   2.45%      
Effective Rate (as a percent)   3.85%      
Total fixed rate mortgage debt | Fixed rate mortgage debt:          
Debt Instrument [Line Items]          
Fixed rate mortgage debt:   $ 629,011     704,274
Series A | Senior Unsecured Notes          
Debt Instrument [Line Items]          
Stated rate (as a percent)   0.00%   3.93%  
Effective Rate (as a percent)   0.00%      
Total   $ 0     100,000
Series B | Senior Unsecured Notes          
Debt Instrument [Line Items]          
Stated rate (as a percent)   4.09%      
Effective Rate (as a percent)   4.12%      
Total   $ 125,000     125,000
Series C | Senior Unsecured Notes          
Debt Instrument [Line Items]          
Stated rate (as a percent)   4.18%      
Effective Rate (as a percent)   4.21%      
Total   $ 125,000     125,000
Series D | Senior Unsecured Notes          
Debt Instrument [Line Items]          
Stated rate (as a percent)   4.08%      
Effective Rate (as a percent)   4.11%      
Total   $ 115,000     115,000
Series E | Senior Unsecured Notes          
Debt Instrument [Line Items]          
Stated rate (as a percent)   4.26%      
Effective Rate (as a percent)   4.27%      
Total   $ 160,000     160,000
Series F | Senior Unsecured Notes          
Debt Instrument [Line Items]          
Stated rate (as a percent)   4.44%      
Effective Rate (as a percent)   4.45%      
Total   $ 175,000     175,000
Series G | Senior Unsecured Notes          
Debt Instrument [Line Items]          
Stated rate (as a percent)   3.61%      
Effective Rate (as a percent)   4.89%      
Total   $ 100,000     100,000
Series H | Senior Unsecured Notes          
Debt Instrument [Line Items]          
Stated rate (as a percent)   3.73%      
Effective Rate (as a percent)   5.00%      
Total   $ 75,000     75,000
Series I | Senior Unsecured Notes          
Debt Instrument [Line Items]          
Stated rate (as a percent)   7.20%      
Effective Rate (as a percent)   7.39%      
Total   $ 155,000     155,000
Series J | Senior Unsecured Notes          
Debt Instrument [Line Items]          
Stated rate (as a percent)   7.32%      
Effective Rate (as a percent)   7.46%      
Total   $ 45,000     45,000
Series K | Senior Unsecured Notes          
Debt Instrument [Line Items]          
Stated rate (as a percent)   7.41%      
Effective Rate (as a percent)   7.52%      
Total   $ 25,000     25,000
Series L | Senior Unsecured Notes          
Debt Instrument [Line Items]          
Stated rate (as a percent)   5.47% 5.47%    
Effective Rate (as a percent)   5.70%      
Total   $ 175,000     0
Unsecured Term Loan Facility | Revolving Credit Facility          
Debt Instrument [Line Items]          
Basis spread on variable rate (as a percent)   1.50%      
Effective Rate (as a percent)   4.46%      
Outstanding borrowings   $ 245,000     175,000
Unsecured Term Loan Facility | Revolving Credit Facility          
Debt Instrument [Line Items]          
Basis spread on variable rate (as a percent) 1.50% 1.50%      
Effective Rate (as a percent)   5.16%      
Outstanding borrowings   $ 95,000     95,000
Unsecured revolving credit facility | Revolving Credit Facility          
Debt Instrument [Line Items]          
Basis spread on variable rate (as a percent)   1.30%      
Effective Rate (as a percent)   4.98%      
Outstanding borrowings   $ 145,000     $ 120,000