v3.26.1
ORGANIZATION OF THE PARENT COMPANY AND THE OPERATING PARTNERSHIP - Narrative (Details)
 6 Months Ended
Jun. 30, 2026
a
ft²
property
Organization of The Parent Company and The Operating Partnership [Line Items]  
Number of real estate properties | property 59
Area of real estate property (in square feet) 11,506,523
Held-for-sale  
Organization of The Parent Company and The Operating Partnership [Line Items]  
Number of real estate properties | property 4
Unconsolidated Properties | Unconsolidated Real Estate Ventures  
Organization of The Parent Company and The Operating Partnership [Line Items]  
Number of real estate properties | property 7
Parent Company  
Organization of The Parent Company and The Operating Partnership [Line Items]  
Area of real estate property (in square feet) 11,600,000
Areas of land held for development (in acres) | a 106.5
Lease agreement term 99 years
Area of additional undeveloped parcels of land with option to purchase (in acres) | a 5.1
Parent Company | Parcel of land  
Organization of The Parent Company and The Operating Partnership [Line Items]  
Lease agreement term 99 years
Parent Company | Leashold Interest Land  
Organization of The Parent Company and The Operating Partnership [Line Items]  
Areas of land held for development (in acres) | a 0.8
Wholly-owned Management Company Subsidiaries  
Organization of The Parent Company and The Operating Partnership [Line Items]  
Area of real estate property (in square feet) 18,900,000
Wholly-owned Management Company Subsidiaries | Wholly Owned Properties  
Organization of The Parent Company and The Operating Partnership [Line Items]  
Area of real estate property (in square feet) 11,800,000
Wholly-owned Management Company Subsidiaries | Partially Owned Properties  
Organization of The Parent Company and The Operating Partnership [Line Items]  
Area of real estate property (in square feet) 6,300,000
Wholly-owned Management Company Subsidiaries | Held-for-sale | Wholly Owned Properties  
Organization of The Parent Company and The Operating Partnership [Line Items]  
Area of real estate property (in square feet) 800,000
Brandywine Operating Partnership, L.P.  
Organization of The Parent Company and The Operating Partnership [Line Items]  
Ownership in the operating partnership 99.70%