Information by Business Segment - Reportable Segments (Details) - USD ($)
$ in Thousands |
3 Months Ended |
9 Months Ended |
|
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2020 |
Sep. 30, 2019 |
Dec. 31, 2019 |
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
$ 154,766
|
$ 159,431
|
$ 445,337
|
$ 483,441
|
|
| Property operating expenses |
(51,552)
|
(49,714)
|
(151,755)
|
(147,045)
|
|
| UJV NOI allocable to COPT |
1,752
|
1,601
|
5,190
|
4,071
|
|
| Segment assets |
4,120,189
|
3,855,369
|
4,120,189
|
3,855,369
|
$ 3,854,453
|
| Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
134,443
|
130,734
|
399,097
|
395,495
|
|
| Property operating expenses |
(51,552)
|
(49,714)
|
(151,755)
|
(147,045)
|
|
| UJV NOI allocable to COPT |
1,752
|
1,601
|
5,190
|
4,071
|
|
| NOI from real estate operations |
84,643
|
82,621
|
252,532
|
252,521
|
|
| Additions to long-lived assets |
24,979
|
22,560
|
66,443
|
53,079
|
|
| Transfers from non-operating properties |
126,859
|
16,242
|
268,815
|
157,328
|
|
| Defense/Information Technology Locations | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
112,709
|
107,957
|
331,739
|
324,932
|
|
| Property operating expenses |
(39,832)
|
(38,673)
|
(118,374)
|
(113,885)
|
|
| UJV NOI allocable to COPT |
1,752
|
1,601
|
5,190
|
4,071
|
|
| NOI from real estate operations |
74,629
|
70,885
|
218,555
|
215,118
|
|
| Additions to long-lived assets |
17,762
|
16,141
|
42,474
|
37,506
|
|
| Transfers from non-operating properties |
126,859
|
17,254
|
268,815
|
158,340
|
|
| Defense/Information Technology Locations | Fort Meade/BW Corridor | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
63,328
|
63,436
|
190,464
|
187,778
|
|
| Property operating expenses |
(21,537)
|
(20,743)
|
(63,618)
|
(62,422)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
41,791
|
42,693
|
126,846
|
125,356
|
|
| Additions to long-lived assets |
7,511
|
10,770
|
22,144
|
22,204
|
|
| Transfers from non-operating properties |
(209)
|
1,381
|
4,304
|
7,759
|
|
| Defense/Information Technology Locations | Northern Virginia Defense/IT | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
14,699
|
13,551
|
42,824
|
42,294
|
|
| Property operating expenses |
(5,245)
|
(4,965)
|
(15,765)
|
(14,951)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
9,454
|
8,586
|
27,059
|
27,343
|
|
| Additions to long-lived assets |
2,219
|
2,922
|
8,114
|
6,072
|
|
| Transfers from non-operating properties |
58
|
118
|
838
|
4,647
|
|
| Defense/Information Technology Locations | Lackland Air Force Base | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
12,602
|
12,703
|
37,935
|
36,368
|
|
| Property operating expenses |
(7,116)
|
(7,149)
|
(21,696)
|
(19,756)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
5,486
|
5,554
|
16,239
|
16,612
|
|
| Additions to long-lived assets |
0
|
0
|
0
|
0
|
|
| Transfers from non-operating properties |
221
|
2,120
|
381
|
10,456
|
|
| Defense/Information Technology Locations | Navy Support Locations | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
8,006
|
8,183
|
24,466
|
24,523
|
|
| Property operating expenses |
(3,044)
|
(3,581)
|
(9,500)
|
(10,271)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
4,962
|
4,602
|
14,966
|
14,252
|
|
| Additions to long-lived assets |
1,650
|
2,003
|
5,518
|
7,948
|
|
| Transfers from non-operating properties |
0
|
0
|
0
|
0
|
|
| Defense/Information Technology Locations | Redstone Arsenal | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
6,079
|
4,171
|
15,402
|
12,078
|
|
| Property operating expenses |
(2,029)
|
(1,717)
|
(5,488)
|
(4,855)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
4,050
|
2,454
|
9,914
|
7,223
|
|
| Additions to long-lived assets |
6,382
|
446
|
6,698
|
1,282
|
|
| Transfers from non-operating properties |
61,520
|
4,152
|
91,827
|
13,363
|
|
| Defense/Information Technology Locations | Data Center Shells | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
7,995
|
5,913
|
20,648
|
21,891
|
|
| Property operating expenses |
(861)
|
(518)
|
(2,307)
|
(1,630)
|
|
| UJV NOI allocable to COPT |
1,752
|
1,601
|
5,190
|
4,071
|
|
| NOI from real estate operations |
8,886
|
6,996
|
23,531
|
24,332
|
|
| Additions to long-lived assets |
0
|
0
|
0
|
0
|
|
| Transfers from non-operating properties |
65,269
|
9,483
|
171,465
|
122,115
|
|
| Regional Office | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
14,913
|
15,508
|
45,535
|
45,359
|
|
| Property operating expenses |
(7,782)
|
(7,343)
|
(22,207)
|
(22,349)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
7,131
|
8,165
|
23,328
|
23,010
|
|
| Additions to long-lived assets |
5,303
|
6,339
|
13,105
|
15,198
|
|
| Transfers from non-operating properties |
0
|
0
|
0
|
0
|
|
| Operating wholesale data center | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
6,068
|
6,565
|
19,695
|
22,996
|
|
| Property operating expenses |
(3,642)
|
(3,374)
|
(10,338)
|
(9,830)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
2,426
|
3,191
|
9,357
|
13,166
|
|
| Additions to long-lived assets |
1,917
|
61
|
10,699
|
312
|
|
| Transfers from non-operating properties |
0
|
(1,012)
|
0
|
(1,012)
|
|
| Other | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
753
|
704
|
2,128
|
2,208
|
|
| Property operating expenses |
(296)
|
(324)
|
(836)
|
(981)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
457
|
380
|
1,292
|
1,227
|
|
| Additions to long-lived assets |
(3)
|
19
|
165
|
63
|
|
| Transfers from non-operating properties |
0
|
0
|
0
|
0
|
|
| Segment assets |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
3,256,968
|
3,024,072
|
3,256,968
|
3,024,072
|
|
| Segment assets | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
3,256,968
|
3,024,072
|
3,256,968
|
3,024,072
|
|
| Segment assets | Defense/Information Technology Locations | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
2,661,201
|
2,421,067
|
2,661,201
|
2,421,067
|
|
| Segment assets | Defense/Information Technology Locations | Fort Meade/BW Corridor | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
1,264,547
|
1,271,668
|
1,264,547
|
1,271,668
|
|
| Segment assets | Defense/Information Technology Locations | Northern Virginia Defense/IT | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
392,226
|
398,137
|
392,226
|
398,137
|
|
| Segment assets | Defense/Information Technology Locations | Lackland Air Force Base | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
143,206
|
147,505
|
143,206
|
147,505
|
|
| Segment assets | Defense/Information Technology Locations | Navy Support Locations | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
180,337
|
186,243
|
180,337
|
186,243
|
|
| Segment assets | Defense/Information Technology Locations | Redstone Arsenal | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
234,355
|
118,839
|
234,355
|
118,839
|
|
| Segment assets | Defense/Information Technology Locations | Data Center Shells | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
446,530
|
298,675
|
446,530
|
298,675
|
|
| Segment assets | Regional Office | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
387,290
|
393,747
|
387,290
|
393,747
|
|
| Segment assets | Operating wholesale data center | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
204,834
|
205,550
|
204,834
|
205,550
|
|
| Segment assets | Other | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
$ 3,643
|
$ 3,708
|
$ 3,643
|
$ 3,708
|
|