v3.25.2
Real Estate (Narrative) (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 27, 2025
USD ($)
ft²
Jun. 30, 2025
USD ($)
Jun. 26, 2025
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
Jun. 26, 2025
USD ($)
Jun. 30, 2024
USD ($)
Mar. 31, 2025
ft²
Jan. 16, 2025
ft²
Real Estate Properties [Line Items]                  
Gains on sales of real estate   $ 18,390   $ 0 $ 18,390   $ 0    
Proceeds from sale of real estate         21,840   0    
Net Income (Loss)   119,141   106,949 206,046   213,553    
Boston Properties Limited Partnership                  
Real Estate Properties [Line Items]                  
Gains on sales of real estate   18,489   0 18,489   0    
Proceeds from sale of real estate         21,840   0    
Net Income (Loss)   120,943   108,652 209,551   216,953    
Reston Next Retail                  
Real Estate Properties [Line Items]                  
Net Rentable Area (in sf) | ft²                 30,000
1050 Winter Street                  
Real Estate Properties [Line Items]                  
Net Rentable Area (in sf) | ft²               162,000  
17 Hartwell Avenue                  
Real Estate Properties [Line Items]                  
Net Rentable Area (in sf) | ft² 30,000                
Gains on sales of real estate   18,400     18,400        
Proceeds from sale of real estate $ 21,800                
Net Income (Loss)     $ (100) $ 23   $ (300) $ 300    
17 Hartwell Avenue | Boston Properties Limited Partnership                  
Real Estate Properties [Line Items]                  
Gains on sales of real estate   $ 18,500     $ 18,500