Quarterly report [Sections 13 or 15(d)]

Organization (Details)

v3.25.1
Organization (Details) - 3 months ended Mar. 31, 2025
ft² in Thousands
property
ft²
a
shares
Preferred Units        
Investments in real estate        
Limited partners' capital account, units outstanding (in units) | shares       0
COPT Defense Properties, L.P. | Common Units | COPT Defense Properties        
Investments in real estate        
Percentage ownership in operating partnership 97.30%      
Unconsolidated Real Estate Joint Ventures        
Investments in real estate        
Number of real estate properties 24      
Operating Properties | Defense/IT Portfolio        
Investments in real estate        
Number of real estate properties 198      
Area of real estate property (in sqft or acres) | ft²   22,600    
Operating Properties | Defense/IT Portfolio | Office Properties        
Investments in real estate        
Number of real estate properties 167      
Area of real estate property (in sqft or acres) | ft²   16,600    
Operating Properties | Defense/IT Portfolio | Single-tenant data centers        
Investments in real estate        
Number of real estate properties 31      
Area of real estate property (in sqft or acres) | ft²   5,900    
Operating Properties | Defense/IT Portfolio | Single-tenant data centers | Unconsolidated Real Estate Joint Ventures        
Investments in real estate        
Number of real estate properties 24      
Operating Properties | Other | Greater Washington, DC/Baltimore        
Investments in real estate        
Number of real estate properties 6      
Area of real estate property (in sqft or acres) | ft²   2,000    
Properties under development | Defense/IT Portfolio        
Investments in real estate        
Number of real estate properties 5      
Area of real estate property (in sqft or acres) | ft²   756    
Properties under development | Defense/IT Portfolio | Office Properties        
Investments in real estate        
Number of real estate properties 3      
Properties under development | Defense/IT Portfolio | Single-tenant data centers        
Investments in real estate        
Number of real estate properties 2      
Land controlled for development | Defense/IT Portfolio        
Investments in real estate        
Area of real estate property (in sqft or acres)   10,800 1,010  
Land controlled for development | Other | Greater Washington, DC/Baltimore        
Investments in real estate        
Area of real estate property (in sqft or acres) | a     50  
Properties under development, partially operational | Defense/IT Portfolio        
Investments in real estate        
Number of real estate properties 1