Information by Business Segment - Segment Financial Information for Our Reportable Segments (Details) - USD ($)
$ in Thousands |
3 Months Ended |
9 Months Ended |
|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Dec. 31, 2025 |
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
$ 208,759
|
$ 188,795
|
$ 606,788
|
$ 566,566
|
|
| Other segment items |
|
|
|
|
|
| Property operating expenses |
(77,217)
|
(70,356)
|
(231,238)
|
(209,311)
|
|
| UJV NOI allocable to COPT Defense |
2,212
|
1,864
|
6,318
|
5,623
|
|
| Segment assets |
4,573,242
|
4,351,432
|
4,573,242
|
4,351,432
|
$ 4,701,790
|
| Reportable segments |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
195,335
|
180,310
|
580,557
|
535,364
|
|
| Other segment items |
|
|
|
|
|
| Property operating expenses |
(77,217)
|
(70,356)
|
(231,238)
|
(209,311)
|
|
| UJV NOI allocable to COPT Defense |
2,212
|
1,864
|
6,318
|
5,623
|
|
| Total other segment items |
(75,005)
|
(68,492)
|
(224,920)
|
(203,688)
|
|
| NOI |
120,330
|
111,818
|
355,637
|
331,676
|
|
| Additions to long-lived assets |
28,017
|
30,917
|
70,997
|
76,977
|
|
| Transfers from non-operating properties |
2,345
|
25,940
|
72,137
|
74,078
|
|
| Segment assets |
3,925,732
|
3,720,879
|
3,925,732
|
3,720,879
|
|
| Reportable segments | Defense/IT Portfolio |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
176,618
|
161,573
|
523,548
|
479,709
|
|
| Other segment items |
|
|
|
|
|
| Property operating expenses |
(66,729)
|
(60,580)
|
(199,301)
|
(180,706)
|
|
| UJV NOI allocable to COPT Defense |
2,212
|
1,864
|
6,318
|
5,623
|
|
| Total other segment items |
(64,517)
|
(58,716)
|
(192,983)
|
(175,083)
|
|
| NOI |
112,101
|
102,857
|
330,565
|
304,626
|
|
| Additions to long-lived assets |
22,768
|
28,051
|
53,891
|
68,749
|
|
| Transfers from non-operating properties |
2,342
|
25,798
|
71,449
|
68,937
|
|
| Segment assets |
3,594,484
|
3,405,258
|
3,594,484
|
3,405,258
|
|
| Reportable segments | Defense/IT Portfolio | Fort Meade/BW Corridor |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
84,693
|
81,756
|
254,158
|
247,701
|
|
| Other segment items |
|
|
|
|
|
| Property operating expenses |
(30,925)
|
(28,477)
|
(95,943)
|
(87,304)
|
|
| UJV NOI allocable to COPT Defense |
0
|
0
|
0
|
0
|
|
| Total other segment items |
(30,925)
|
(28,477)
|
(95,943)
|
(87,304)
|
|
| NOI |
53,768
|
53,279
|
158,215
|
160,397
|
|
| Additions to long-lived assets |
11,616
|
12,812
|
31,772
|
30,876
|
|
| Transfers from non-operating properties |
25
|
19,751
|
41,161
|
34,984
|
|
| Segment assets |
1,476,279
|
1,460,768
|
1,476,279
|
1,460,768
|
|
| Reportable segments | Defense/IT Portfolio | Redstone Arsenal |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
21,197
|
19,477
|
61,979
|
54,876
|
|
| Other segment items |
|
|
|
|
|
| Property operating expenses |
(7,388)
|
(7,250)
|
(21,352)
|
(19,704)
|
|
| UJV NOI allocable to COPT Defense |
0
|
0
|
0
|
0
|
|
| Total other segment items |
(7,388)
|
(7,250)
|
(21,352)
|
(19,704)
|
|
| NOI |
13,809
|
12,227
|
40,627
|
35,172
|
|
| Additions to long-lived assets |
1,898
|
2,209
|
5,404
|
12,395
|
|
| Transfers from non-operating properties |
239
|
4,806
|
5,149
|
23,428
|
|
| Segment assets |
607,332
|
618,618
|
607,332
|
618,618
|
|
| Reportable segments | Defense/IT Portfolio | NoVA Defense/IT |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
25,066
|
22,343
|
74,706
|
67,523
|
|
| Other segment items |
|
|
|
|
|
| Property operating expenses |
(9,613)
|
(8,891)
|
(29,305)
|
(27,838)
|
|
| UJV NOI allocable to COPT Defense |
0
|
0
|
0
|
0
|
|
| Total other segment items |
(9,613)
|
(8,891)
|
(29,305)
|
(27,838)
|
|
| NOI |
15,453
|
13,452
|
45,401
|
39,685
|
|
| Additions to long-lived assets |
7,392
|
7,061
|
10,970
|
12,880
|
|
| Transfers from non-operating properties |
59
|
26
|
890
|
42
|
|
| Segment assets |
555,757
|
491,051
|
555,757
|
491,051
|
|
| Reportable segments | Defense/IT Portfolio | Lackland Air Force Base |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
20,661
|
18,555
|
58,567
|
52,440
|
|
| Other segment items |
|
|
|
|
|
| Property operating expenses |
(11,050)
|
(10,245)
|
(29,897)
|
(28,485)
|
|
| UJV NOI allocable to COPT Defense |
0
|
0
|
0
|
0
|
|
| Total other segment items |
(11,050)
|
(10,245)
|
(29,897)
|
(28,485)
|
|
| NOI |
9,611
|
8,310
|
28,670
|
23,955
|
|
| Additions to long-lived assets |
(72)
|
7
|
263
|
224
|
|
| Transfers from non-operating properties |
249
|
0
|
249
|
0
|
|
| Segment assets |
192,003
|
193,734
|
192,003
|
193,734
|
|
| Reportable segments | Defense/IT Portfolio | Navy Support |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
9,756
|
8,727
|
28,271
|
24,945
|
|
| Other segment items |
|
|
|
|
|
| Property operating expenses |
(4,588)
|
(4,016)
|
(13,051)
|
(12,038)
|
|
| UJV NOI allocable to COPT Defense |
0
|
0
|
0
|
0
|
|
| Total other segment items |
(4,588)
|
(4,016)
|
(13,051)
|
(12,038)
|
|
| NOI |
5,168
|
4,711
|
15,220
|
12,907
|
|
| Additions to long-lived assets |
1,934
|
5,962
|
5,482
|
12,374
|
|
| Transfers from non-operating properties |
0
|
0
|
0
|
2
|
|
| Segment assets |
168,948
|
167,810
|
168,948
|
167,810
|
|
| Reportable segments | Defense/IT Portfolio | Data Center Shells |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
15,245
|
10,715
|
45,867
|
32,224
|
|
| Other segment items |
|
|
|
|
|
| Property operating expenses |
(3,165)
|
(1,701)
|
(9,753)
|
(5,337)
|
|
| UJV NOI allocable to COPT Defense |
2,212
|
1,864
|
6,318
|
5,623
|
|
| Total other segment items |
(953)
|
163
|
(3,435)
|
286
|
|
| NOI |
14,292
|
10,878
|
42,432
|
32,510
|
|
| Additions to long-lived assets |
0
|
0
|
0
|
0
|
|
| Transfers from non-operating properties |
1,770
|
1,215
|
24,000
|
10,481
|
|
| Segment assets |
594,165
|
473,277
|
594,165
|
473,277
|
|
| Reportable segments | Other |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
18,717
|
18,737
|
57,009
|
55,655
|
|
| Other segment items |
|
|
|
|
|
| Property operating expenses |
(10,488)
|
(9,776)
|
(31,937)
|
(28,605)
|
|
| UJV NOI allocable to COPT Defense |
0
|
0
|
0
|
0
|
|
| Total other segment items |
(10,488)
|
(9,776)
|
(31,937)
|
(28,605)
|
|
| NOI |
8,229
|
8,961
|
25,072
|
27,050
|
|
| Additions to long-lived assets |
5,249
|
2,866
|
17,106
|
8,228
|
|
| Transfers from non-operating properties |
3
|
142
|
688
|
5,141
|
|
| Segment assets |
$ 331,248
|
$ 315,621
|
$ 331,248
|
$ 315,621
|
|