Information by Business Segment - Segment Financial Information for Our Reportable Segments (Details) - USD ($)
$ in Thousands |
3 Months Ended |
9 Months Ended |
|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
Dec. 31, 2020 |
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
$ 174,636
|
$ 154,766
|
$ 500,769
|
$ 445,337
|
|
| Property operating expenses |
(57,190)
|
(51,552)
|
(168,780)
|
(151,755)
|
|
| UJV NOI allocable to COPT |
1,060
|
1,752
|
2,950
|
5,190
|
|
| Segment assets |
4,151,138
|
4,120,189
|
4,151,138
|
4,120,189
|
$ 4,077,023
|
| Segment assets |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
3,542,871
|
3,256,968
|
3,542,871
|
3,256,968
|
|
| Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
146,590
|
134,443
|
436,177
|
399,097
|
|
| Property operating expenses |
(57,190)
|
(51,552)
|
(168,780)
|
(151,755)
|
|
| UJV NOI allocable to COPT |
1,060
|
1,752
|
2,950
|
5,190
|
|
| NOI from real estate operations |
90,460
|
84,643
|
270,347
|
252,532
|
|
| Additions to long-lived assets |
19,818
|
24,979
|
53,058
|
66,443
|
|
| Transfers from non-operating properties |
155,574
|
126,859
|
260,660
|
268,815
|
|
| Real estate operations | Defense/Information Technology Locations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
120,454
|
112,709
|
358,634
|
331,739
|
|
| Property operating expenses |
(42,985)
|
(39,832)
|
(129,205)
|
(118,374)
|
|
| UJV NOI allocable to COPT |
1,060
|
1,752
|
2,950
|
5,190
|
|
| NOI from real estate operations |
78,529
|
74,629
|
232,379
|
218,555
|
|
| Additions to long-lived assets |
13,289
|
17,762
|
38,056
|
42,474
|
|
| Transfers from non-operating properties |
155,193
|
126,859
|
221,922
|
268,815
|
|
| Real estate operations | Defense/Information Technology Locations | Fort Meade/BW Corridor |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
66,029
|
63,328
|
197,315
|
190,464
|
|
| Property operating expenses |
(22,956)
|
(21,537)
|
(69,341)
|
(63,618)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
43,073
|
41,791
|
127,974
|
126,846
|
|
| Additions to long-lived assets |
10,671
|
7,511
|
29,063
|
22,144
|
|
| Transfers from non-operating properties |
53,935
|
(209)
|
55,075
|
4,304
|
|
| Real estate operations | Defense/Information Technology Locations | Northern Virginia Defense/IT |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
15,291
|
14,699
|
45,214
|
42,824
|
|
| Property operating expenses |
(5,980)
|
(5,245)
|
(17,394)
|
(15,765)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
9,311
|
9,454
|
27,820
|
27,059
|
|
| Additions to long-lived assets |
1,614
|
2,219
|
2,921
|
8,114
|
|
| Transfers from non-operating properties |
87,986
|
58
|
88,099
|
838
|
|
| Real estate operations | Defense/Information Technology Locations | Lackland Air Force Base |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
14,519
|
12,602
|
40,762
|
37,935
|
|
| Property operating expenses |
(6,935)
|
(7,116)
|
(21,315)
|
(21,696)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
7,584
|
5,486
|
19,447
|
16,239
|
|
| Additions to long-lived assets |
0
|
0
|
0
|
0
|
|
| Transfers from non-operating properties |
7,332
|
221
|
56,601
|
381
|
|
| Real estate operations | Defense/Information Technology Locations | Navy Support Locations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
8,558
|
8,006
|
25,401
|
24,466
|
|
| Property operating expenses |
(3,454)
|
(3,044)
|
(10,114)
|
(9,500)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
5,104
|
4,962
|
15,287
|
14,966
|
|
| Additions to long-lived assets |
897
|
1,650
|
2,654
|
5,518
|
|
| Transfers from non-operating properties |
0
|
0
|
0
|
0
|
|
| Real estate operations | Defense/Information Technology Locations | Redstone Arsenal |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
9,144
|
6,079
|
26,172
|
15,402
|
|
| Property operating expenses |
(3,003)
|
(2,029)
|
(8,525)
|
(5,488)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
6,141
|
4,050
|
17,647
|
9,914
|
|
| Additions to long-lived assets |
107
|
6,382
|
3,418
|
6,698
|
|
| Transfers from non-operating properties |
5,519
|
61,520
|
19,724
|
91,827
|
|
| Real estate operations | Defense/Information Technology Locations | Data Center Shells |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
6,913
|
7,995
|
23,770
|
20,648
|
|
| Property operating expenses |
(657)
|
(861)
|
(2,516)
|
(2,307)
|
|
| UJV NOI allocable to COPT |
1,060
|
1,752
|
2,950
|
5,190
|
|
| NOI from real estate operations |
7,316
|
8,886
|
24,204
|
23,531
|
|
| Additions to long-lived assets |
0
|
0
|
0
|
0
|
|
| Transfers from non-operating properties |
421
|
65,269
|
2,423
|
171,465
|
|
| Real estate operations | Regional Office |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
16,810
|
14,913
|
50,371
|
45,535
|
|
| Property operating expenses |
(8,395)
|
(7,782)
|
(23,901)
|
(22,207)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
8,415
|
7,131
|
26,470
|
23,328
|
|
| Additions to long-lived assets |
5,319
|
5,303
|
13,430
|
13,105
|
|
| Transfers from non-operating properties |
381
|
0
|
38,738
|
0
|
|
| Real estate operations | Operating wholesale data center |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
8,637
|
6,068
|
24,902
|
19,695
|
|
| Property operating expenses |
(5,345)
|
(3,642)
|
(14,395)
|
(10,338)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
3,292
|
2,426
|
10,507
|
9,357
|
|
| Additions to long-lived assets |
1,141
|
1,917
|
1,490
|
10,699
|
|
| Transfers from non-operating properties |
0
|
0
|
0
|
0
|
|
| Real estate operations | Other |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
689
|
753
|
2,270
|
2,128
|
|
| Property operating expenses |
(465)
|
(296)
|
(1,279)
|
(836)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
224
|
457
|
991
|
1,292
|
|
| Additions to long-lived assets |
69
|
(3)
|
82
|
165
|
|
| Transfers from non-operating properties |
0
|
0
|
0
|
0
|
|
| Real estate operations | Segment assets |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
3,542,871
|
3,256,968
|
3,542,871
|
3,256,968
|
|
| Real estate operations | Segment assets | Defense/Information Technology Locations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
2,806,707
|
2,661,201
|
2,806,707
|
2,661,201
|
|
| Real estate operations | Segment assets | Defense/Information Technology Locations | Fort Meade/BW Corridor |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
1,315,101
|
1,264,547
|
1,315,101
|
1,264,547
|
|
| Real estate operations | Segment assets | Defense/Information Technology Locations | Northern Virginia Defense/IT |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
470,077
|
392,226
|
470,077
|
392,226
|
|
| Real estate operations | Segment assets | Defense/Information Technology Locations | Lackland Air Force Base |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
196,624
|
143,206
|
196,624
|
143,206
|
|
| Real estate operations | Segment assets | Defense/Information Technology Locations | Navy Support Locations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
172,381
|
180,337
|
172,381
|
180,337
|
|
| Real estate operations | Segment assets | Defense/Information Technology Locations | Redstone Arsenal |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
299,184
|
234,355
|
299,184
|
234,355
|
|
| Real estate operations | Segment assets | Defense/Information Technology Locations | Data Center Shells |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
353,340
|
446,530
|
353,340
|
446,530
|
|
| Real estate operations | Segment assets | Regional Office |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
538,080
|
387,290
|
538,080
|
387,290
|
|
| Real estate operations | Segment assets | Operating wholesale data center |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
194,576
|
204,834
|
194,576
|
204,834
|
|
| Real estate operations | Segment assets | Other |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
$ 3,508
|
$ 3,643
|
$ 3,508
|
$ 3,643
|
|