Annual report [Section 13 and 15(d), not S-K Item 405]

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

v3.25.4
Information by Business Segment - Segment Financial Information for Our Reportable Segments (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Segment financial information for real estate operations      
Revenues from real estate operations $ 763,923 $ 753,267 $ 684,982
Other segment items      
Property operating expenses (283,927) (266,001) (247,385)
UJV NOI allocable to COPT Defense 7,706 7,217 6,659
Assets 4,701,790 4,254,191  
Reportable segments      
Segment financial information for real estate operations      
Revenues from real estate operations 721,849 677,717 624,803
Other segment items      
Property operating expenses (283,927) (266,001) (247,385)
UJV NOI allocable to COPT Defense 7,706 7,217 6,659
Total other segment items (276,221) (258,784) (240,726)
NOI 445,628 418,933 384,077
Additions to long-lived assets 150,188 145,785 117,628
Transfers from non-operating properties 192,737 136,930 275,808
Assets 3,872,672 3,710,647 3,586,539
Reportable segments | Defense/IT Portfolio      
Segment financial information for real estate operations      
Revenues from real estate operations 646,916 610,325 555,579
Other segment items      
Property operating expenses (244,572) (227,472) (205,917)
UJV NOI allocable to COPT Defense 7,706 7,217 6,659
Total other segment items (236,866) (220,255) (199,258)
NOI 410,050 390,070 356,321
Additions to long-lived assets 130,179 125,921 100,709
Transfers from non-operating properties 186,883 131,605 273,137
Assets 3,548,362 3,395,402 3,277,285
Reportable segments | Defense/IT Portfolio | Fort Meade/BW Corridor      
Segment financial information for real estate operations      
Revenues from real estate operations 329,916 317,319 292,699
Other segment items      
Property operating expenses (117,491) (108,789) (101,243)
UJV NOI allocable to COPT Defense 0 0 0
Total other segment items (117,491) (108,789) (101,243)
NOI 212,425 208,530 191,456
Additions to long-lived assets 45,226 64,237 54,872
Transfers from non-operating properties 46,728 4,041 64,264
Assets 1,467,935 1,448,641 1,449,638
Reportable segments | Defense/IT Portfolio | Redstone Arsenal      
Segment financial information for real estate operations      
Revenues from real estate operations 74,659 69,317 55,131
Other segment items      
Property operating expenses (26,630) (24,185) (19,148)
UJV NOI allocable to COPT Defense 0 0 0
Total other segment items (26,630) (24,185) (19,148)
NOI 48,029 45,132 35,983
Additions to long-lived assets 13,118 7,253 20,949
Transfers from non-operating properties 25,383 60,872 86,868
Assets 615,352 601,430 554,803
Reportable segments | Defense/IT Portfolio | NoVA Defense/IT      
Segment financial information for real estate operations      
Revenues from real estate operations 90,830 86,034 80,413
Other segment items      
Property operating expenses (37,041) (36,059) (31,593)
UJV NOI allocable to COPT Defense 0 0 0
Total other segment items (37,041) (36,059) (31,593)
NOI 53,789 49,975 48,820
Additions to long-lived assets 51,038 27,205 19,041
Transfers from non-operating properties 46 1,016 4,136
Assets 522,301 494,881 490,104
Reportable segments | Defense/IT Portfolio | Lackland Air Force Base      
Segment financial information for real estate operations      
Revenues from real estate operations 73,079 67,837 67,254
Other segment items      
Property operating expenses (40,065) (37,169) (36,616)
UJV NOI allocable to COPT Defense 0 0 0
Total other segment items (40,065) (37,169) (36,616)
NOI 33,014 30,668 30,638
Additions to long-lived assets 1,509 17,098 62
Transfers from non-operating properties 0 10 166
Assets 193,861 199,166 188,847
Reportable segments | Defense/IT Portfolio | Navy Support      
Segment financial information for real estate operations      
Revenues from real estate operations 33,566 32,628 32,638
Other segment items      
Property operating expenses (15,852) (15,146) (14,614)
UJV NOI allocable to COPT Defense 0 0 0
Total other segment items (15,852) (15,146) (14,614)
NOI 17,714 17,482 18,024
Additions to long-lived assets 19,288 10,128 5,785
Transfers from non-operating properties 0 352 2,651
Assets 172,101 162,855 163,818
Reportable segments | Defense/IT Portfolio | Data Center Shells      
Segment financial information for real estate operations      
Revenues from real estate operations 44,866 37,190 27,444
Other segment items      
Property operating expenses (7,493) (6,124) (2,703)
UJV NOI allocable to COPT Defense 7,706 7,217 6,659
Total other segment items 213 1,093 3,956
NOI 45,079 38,283 31,400
Additions to long-lived assets 0 0 0
Transfers from non-operating properties 114,726 65,314 115,052
Assets 576,812 488,429 430,075
Reportable segments | Other      
Segment financial information for real estate operations      
Revenues from real estate operations 74,933 67,392 69,224
Other segment items      
Property operating expenses (39,355) (38,529) (41,468)
UJV NOI allocable to COPT Defense 0 0 0
Total other segment items (39,355) (38,529) (41,468)
NOI 35,578 28,863 27,756
Additions to long-lived assets 20,009 19,864 16,919
Transfers from non-operating properties 5,854 5,325 2,671
Assets $ 324,310 $ 315,245 $ 309,254