Quarterly report [Sections 13 or 15(d)]

Information by Business Segment - Segment Financial Information for Our Reportable Segments (Details)

v3.26.1
Information by Business Segment - Segment Financial Information for Our Reportable Segments (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Segment financial information for real estate operations      
Revenues from real estate operations $ 200,637 $ 187,856  
Other segment items      
Property operating expenses (81,435) (72,040)  
UJV NOI allocable to COPT Defense 2,056 1,889  
Segment assets 4,458,909 4,250,311 $ 4,701,790
Reportable segments      
Segment financial information for real estate operations      
Revenues from real estate operations 194,596 177,597  
Other segment items      
Property operating expenses (81,435) (72,040)  
UJV NOI allocable to COPT Defense 2,056 1,889  
Total other segment items (79,379) (70,151)  
NOI 115,217 107,446  
Additions to long-lived assets 18,755 19,415  
Transfers from non-operating properties 18,974 12,336  
Segment assets 3,868,145 3,702,958  
Reportable segments | Defense/IT Portfolio      
Segment financial information for real estate operations      
Revenues from real estate operations 175,005 159,427  
Other segment items      
Property operating expenses (69,991) (63,331)  
UJV NOI allocable to COPT Defense 2,056 1,889  
Total other segment items (67,935) (61,442)  
NOI 107,070 97,985  
Additions to long-lived assets 12,154 17,682  
Transfers from non-operating properties 18,586 9,562  
Segment assets 3,540,817 3,388,087  
Reportable segments | Defense/IT Portfolio | Fort Meade/BW Corridor      
Segment financial information for real estate operations      
Revenues from real estate operations 87,533 84,608  
Other segment items      
Property operating expenses (36,480) (31,930)  
UJV NOI allocable to COPT Defense 0 0  
Total other segment items (36,480) (31,930)  
NOI 51,053 52,678  
Additions to long-lived assets 7,646 8,093  
Transfers from non-operating properties 116 1,337  
Segment assets 1,454,179 1,441,470  
Reportable segments | Defense/IT Portfolio | Redstone Arsenal      
Segment financial information for real estate operations      
Revenues from real estate operations 20,645 16,422  
Other segment items      
Property operating expenses (7,249) (6,294)  
UJV NOI allocable to COPT Defense 0 0  
Total other segment items (7,249) (6,294)  
NOI 13,396 10,128  
Additions to long-lived assets 882 3,248  
Transfers from non-operating properties 2,909 4,266  
Segment assets 613,080 601,935  
Reportable segments | Defense/IT Portfolio | NoVA Defense/IT      
Segment financial information for real estate operations      
Revenues from real estate operations 24,816 23,162  
Other segment items      
Property operating expenses (10,356) (10,089)  
UJV NOI allocable to COPT Defense 0 0  
Total other segment items (10,356) (10,089)  
NOI 14,460 13,073  
Additions to long-lived assets 2,003 2,556  
Transfers from non-operating properties 5 18  
Segment assets 517,239 492,384  
Reportable segments | Defense/IT Portfolio | Lackland Air Force Base      
Segment financial information for real estate operations      
Revenues from real estate operations 18,354 16,410  
Other segment items      
Property operating expenses (8,998) (8,999)  
UJV NOI allocable to COPT Defense 0 0  
Total other segment items (8,998) (8,999)  
NOI 9,356 7,411  
Additions to long-lived assets (56) 119  
Transfers from non-operating properties 0 0  
Segment assets 193,465 197,349  
Reportable segments | Defense/IT Portfolio | Navy Support      
Segment financial information for real estate operations      
Revenues from real estate operations 8,992 7,960  
Other segment items      
Property operating expenses (4,359) (4,166)  
UJV NOI allocable to COPT Defense 0 0  
Total other segment items (4,359) (4,166)  
NOI 4,633 3,794  
Additions to long-lived assets 1,679 3,666  
Transfers from non-operating properties 0 0  
Segment assets 172,205 163,951  
Reportable segments | Defense/IT Portfolio | Data Center Shells      
Segment financial information for real estate operations      
Revenues from real estate operations 14,665 10,865  
Other segment items      
Property operating expenses (2,549) (1,853)  
UJV NOI allocable to COPT Defense 2,056 1,889  
Total other segment items (493) 36  
NOI 14,172 10,901  
Additions to long-lived assets 0 0  
Transfers from non-operating properties 15,556 3,941  
Segment assets 590,649 490,998  
Reportable segments | Other      
Segment financial information for real estate operations      
Revenues from real estate operations 19,591 18,170  
Other segment items      
Property operating expenses (11,444) (8,709)  
UJV NOI allocable to COPT Defense 0 0  
Total other segment items (11,444) (8,709)  
NOI 8,147 9,461  
Additions to long-lived assets 6,601 1,733  
Transfers from non-operating properties 388 2,774  
Segment assets $ 327,328 $ 314,871