Information by Business Segment (Segment Financial Information for Our Reportable Segments) (Details) - USD ($)
$ in Thousands |
3 Months Ended |
12 Months Ended |
Dec. 31, 2021 |
Sep. 30, 2021 |
Jun. 30, 2021 |
Mar. 31, 2021 |
Dec. 31, 2020 |
Sep. 30, 2020 |
Jun. 30, 2020 |
Mar. 31, 2020 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Revenues from real estate operations |
$ 185,932
|
$ 166,919
|
$ 157,207
|
$ 154,388
|
$ 156,607
|
$ 148,801
|
$ 138,321
|
$ 138,625
|
$ 664,446
|
$ 582,354
|
$ 611,821
|
| Property operating expenses |
|
|
|
|
|
|
|
|
(213,377)
|
(190,796)
|
(185,449)
|
| UJV NOI allocable to COPT |
|
|
|
|
|
|
|
|
4,029
|
6,951
|
5,705
|
| Segment assets |
4,262,452
|
|
|
|
4,077,023
|
|
|
|
4,262,452
|
4,077,023
|
|
| Segment assets |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Segment assets |
3,575,462
|
|
|
|
3,388,978
|
|
|
|
3,575,462
|
3,388,978
|
|
| Real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Revenues from real estate operations |
|
|
|
|
|
|
|
|
587,060
|
538,725
|
527,463
|
| Property operating expenses |
|
|
|
|
|
|
|
|
(230,219)
|
(203,840)
|
(198,143)
|
| UJV NOI allocable to COPT |
|
|
|
|
|
|
|
|
4,029
|
6,951
|
5,705
|
| NOI from real estate operations |
|
|
|
|
|
|
|
|
360,870
|
341,836
|
335,025
|
| Additions to long-lived assets |
|
|
|
|
|
|
|
|
96,785
|
81,479
|
76,350
|
| Transfers from non-operating properties |
|
|
|
|
|
|
|
|
284,949
|
476,362
|
226,001
|
| Real estate operations | Total Defense/IT Locations |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Revenues from real estate operations |
|
|
|
|
|
|
|
|
483,332
|
447,519
|
435,486
|
| Property operating expenses |
|
|
|
|
|
|
|
|
(175,595)
|
(159,377)
|
(153,803)
|
| UJV NOI allocable to COPT |
|
|
|
|
|
|
|
|
4,029
|
6,951
|
5,705
|
| NOI from real estate operations |
|
|
|
|
|
|
|
|
311,766
|
295,093
|
287,388
|
| Additions to long-lived assets |
|
|
|
|
|
|
|
|
59,205
|
52,924
|
54,404
|
| Transfers from non-operating properties |
|
|
|
|
|
|
|
|
245,630
|
393,271
|
227,013
|
| Real estate operations | Total Defense/IT Locations | Fort Meade/BW Corridor |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Revenues from real estate operations |
|
|
|
|
|
|
|
|
262,120
|
254,197
|
252,781
|
| Property operating expenses |
|
|
|
|
|
|
|
|
(92,521)
|
(85,032)
|
(82,815)
|
| UJV NOI allocable to COPT |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
| NOI from real estate operations |
|
|
|
|
|
|
|
|
169,599
|
169,165
|
169,966
|
| Additions to long-lived assets |
|
|
|
|
|
|
|
|
45,647
|
31,295
|
34,618
|
| Transfers from non-operating properties |
|
|
|
|
|
|
|
|
70,514
|
21,859
|
18,606
|
| Real estate operations | Total Defense/IT Locations | Northern Virginia Defense/IT |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Revenues from real estate operations |
|
|
|
|
|
|
|
|
62,390
|
57,817
|
55,742
|
| Property operating expenses |
|
|
|
|
|
|
|
|
(23,218)
|
(21,321)
|
(19,779)
|
| UJV NOI allocable to COPT |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
| NOI from real estate operations |
|
|
|
|
|
|
|
|
39,172
|
36,496
|
35,963
|
| Additions to long-lived assets |
|
|
|
|
|
|
|
|
5,823
|
11,620
|
9,326
|
| Transfers from non-operating properties |
|
|
|
|
|
|
|
|
90,050
|
2,557
|
4,548
|
| Real estate operations | Total Defense/IT Locations | Lackland Air Force Base |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Revenues from real estate operations |
|
|
|
|
|
|
|
|
57,756
|
50,982
|
51,140
|
| Property operating expenses |
|
|
|
|
|
|
|
|
(30,535)
|
(29,055)
|
(29,042)
|
| UJV NOI allocable to COPT |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
| NOI from real estate operations |
|
|
|
|
|
|
|
|
27,221
|
21,927
|
22,098
|
| Additions to long-lived assets |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
| Transfers from non-operating properties |
|
|
|
|
|
|
|
|
59,323
|
456
|
10,781
|
| Real estate operations | Total Defense/IT Locations | Navy Support Locations |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Revenues from real estate operations |
|
|
|
|
|
|
|
|
33,757
|
32,869
|
32,659
|
| Property operating expenses |
|
|
|
|
|
|
|
|
(13,617)
|
(12,655)
|
(13,579)
|
| UJV NOI allocable to COPT |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
| NOI from real estate operations |
|
|
|
|
|
|
|
|
20,140
|
20,214
|
19,080
|
| Additions to long-lived assets |
|
|
|
|
|
|
|
|
4,193
|
7,104
|
8,912
|
| Transfers from non-operating properties |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
| Real estate operations | Total Defense/IT Locations | Redstone Arsenal |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Revenues from real estate operations |
|
|
|
|
|
|
|
|
35,727
|
22,515
|
16,593
|
| Property operating expenses |
|
|
|
|
|
|
|
|
(11,618)
|
(8,119)
|
(6,626)
|
| UJV NOI allocable to COPT |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
| NOI from real estate operations |
|
|
|
|
|
|
|
|
24,109
|
14,396
|
9,967
|
| Additions to long-lived assets |
|
|
|
|
|
|
|
|
3,542
|
2,905
|
1,548
|
| Transfers from non-operating properties |
|
|
|
|
|
|
|
|
22,739
|
138,122
|
33,606
|
| Real estate operations | Total Defense/IT Locations | Data Center Shells |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Revenues from real estate operations |
|
|
|
|
|
|
|
|
31,582
|
29,139
|
26,571
|
| Property operating expenses |
|
|
|
|
|
|
|
|
(4,086)
|
(3,195)
|
(1,962)
|
| UJV NOI allocable to COPT |
|
|
|
|
|
|
|
|
4,029
|
6,951
|
5,705
|
| NOI from real estate operations |
|
|
|
|
|
|
|
|
31,525
|
32,895
|
30,314
|
| Additions to long-lived assets |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
| Transfers from non-operating properties |
|
|
|
|
|
|
|
|
3,004
|
230,277
|
159,472
|
| Real estate operations | Regional Office |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Revenues from real estate operations |
|
|
|
|
|
|
|
|
66,570
|
60,627
|
59,611
|
| Property operating expenses |
|
|
|
|
|
|
|
|
(32,623)
|
(29,144)
|
(29,682)
|
| UJV NOI allocable to COPT |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
| NOI from real estate operations |
|
|
|
|
|
|
|
|
33,947
|
31,483
|
29,929
|
| Additions to long-lived assets |
|
|
|
|
|
|
|
|
35,412
|
17,232
|
20,925
|
| Transfers from non-operating properties |
|
|
|
|
|
|
|
|
39,319
|
83,091
|
0
|
| Real estate operations | Wholesale Data Center |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Revenues from real estate operations |
|
|
|
|
|
|
|
|
30,490
|
27,011
|
29,405
|
| Property operating expenses |
|
|
|
|
|
|
|
|
(17,424)
|
(13,543)
|
(13,213)
|
| UJV NOI allocable to COPT |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
| NOI from real estate operations |
|
|
|
|
|
|
|
|
13,066
|
13,468
|
16,192
|
| Additions to long-lived assets |
|
|
|
|
|
|
|
|
1,680
|
10,856
|
893
|
| Transfers from non-operating properties |
|
|
|
|
|
|
|
|
0
|
0
|
(1,012)
|
| Real estate operations | Other |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Revenues from real estate operations |
|
|
|
|
|
|
|
|
6,668
|
3,568
|
2,961
|
| Property operating expenses |
|
|
|
|
|
|
|
|
(4,577)
|
(1,776)
|
(1,445)
|
| UJV NOI allocable to COPT |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
| NOI from real estate operations |
|
|
|
|
|
|
|
|
2,091
|
1,792
|
1,516
|
| Additions to long-lived assets |
|
|
|
|
|
|
|
|
488
|
467
|
128
|
| Transfers from non-operating properties |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
| Real estate operations | Segment assets |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Segment assets |
3,575,462
|
|
|
|
3,388,978
|
|
|
|
3,575,462
|
3,388,978
|
3,024,958
|
| Real estate operations | Segment assets | Total Defense/IT Locations |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Segment assets |
2,823,694
|
|
|
|
2,692,912
|
|
|
|
2,823,694
|
2,692,912
|
2,426,019
|
| Real estate operations | Segment assets | Total Defense/IT Locations | Fort Meade/BW Corridor |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Segment assets |
1,332,399
|
|
|
|
1,277,849
|
|
|
|
1,332,399
|
1,277,849
|
1,280,656
|
| Real estate operations | Segment assets | Total Defense/IT Locations | Northern Virginia Defense/IT |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Segment assets |
471,760
|
|
|
|
392,714
|
|
|
|
471,760
|
392,714
|
396,914
|
| Real estate operations | Segment assets | Total Defense/IT Locations | Lackland Air Force Base |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Segment assets |
198,200
|
|
|
|
142,137
|
|
|
|
198,200
|
142,137
|
146,592
|
| Real estate operations | Segment assets | Total Defense/IT Locations | Navy Support Locations |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Segment assets |
170,985
|
|
|
|
178,897
|
|
|
|
170,985
|
178,897
|
184,257
|
| Real estate operations | Segment assets | Total Defense/IT Locations | Redstone Arsenal |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Segment assets |
300,252
|
|
|
|
281,386
|
|
|
|
300,252
|
281,386
|
138,501
|
| Real estate operations | Segment assets | Total Defense/IT Locations | Data Center Shells |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Segment assets |
350,098
|
|
|
|
419,929
|
|
|
|
350,098
|
419,929
|
279,099
|
| Real estate operations | Segment assets | Regional Office |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Segment assets |
555,090
|
|
|
|
490,422
|
|
|
|
555,090
|
490,422
|
392,319
|
| Real estate operations | Segment assets | Wholesale Data Center |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Segment assets |
192,647
|
|
|
|
201,820
|
|
|
|
192,647
|
201,820
|
202,935
|
| Real estate operations | Segment assets | Other |
|
|
|
|
|
|
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
|
|
|
|
|
|
| Segment assets |
$ 4,031
|
|
|
|
$ 3,824
|
|
|
|
$ 4,031
|
$ 3,824
|
$ 3,685
|