Information by Business Segment (Details) - USD ($)
$ in Thousands |
3 Months Ended |
9 Months Ended |
|
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
Dec. 31, 2018 |
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
$ 159,431
|
$ 137,411
|
$ 483,441
|
$ 439,630
|
|
| Property operating expenses |
(49,714)
|
(49,340)
|
(147,045)
|
(149,737)
|
|
| UJV NOI allocable to COPT |
1,601
|
1,206
|
4,071
|
3,607
|
|
| Segment assets |
3,855,369
|
3,650,366
|
3,855,369
|
3,650,366
|
$ 3,656,005
|
| Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
130,734
|
128,988
|
395,495
|
386,428
|
|
| Property operating expenses |
(49,714)
|
(49,340)
|
(147,045)
|
(149,737)
|
|
| UJV NOI allocable to COPT |
1,601
|
1,206
|
4,071
|
3,607
|
|
| NOI from real estate operations |
82,621
|
80,854
|
252,521
|
240,298
|
|
| Additions to long-lived assets |
22,560
|
21,259
|
53,079
|
52,322
|
|
| Transfers from non-operating properties |
16,242
|
46,685
|
157,328
|
101,003
|
|
| Defense/Information Technology Locations | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
107,957
|
104,932
|
324,932
|
314,279
|
|
| Property operating expenses |
(38,673)
|
(37,148)
|
(113,885)
|
(113,852)
|
|
| UJV NOI allocable to COPT |
1,601
|
1,206
|
4,071
|
3,607
|
|
| NOI from real estate operations |
70,885
|
68,990
|
215,118
|
204,034
|
|
| Additions to long-lived assets |
16,141
|
15,307
|
37,506
|
36,693
|
|
| Transfers from non-operating properties |
17,254
|
46,530
|
158,340
|
98,703
|
|
| Defense/Information Technology Locations | Fort Meade/BW Corridor | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
63,436
|
61,396
|
187,778
|
186,171
|
|
| Property operating expenses |
(20,743)
|
(19,847)
|
(62,422)
|
(61,550)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
42,693
|
41,549
|
125,356
|
124,621
|
|
| Additions to long-lived assets |
10,770
|
11,211
|
22,204
|
26,483
|
|
| Transfers from non-operating properties |
1,381
|
14,698
|
7,759
|
34,919
|
|
| Defense/Information Technology Locations | Northern Virginia Defense/IT | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
13,551
|
13,960
|
42,294
|
39,639
|
|
| Property operating expenses |
(4,965)
|
(5,518)
|
(14,951)
|
(15,150)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
8,586
|
8,442
|
27,343
|
24,489
|
|
| Additions to long-lived assets |
2,922
|
2,305
|
6,072
|
5,431
|
|
| Transfers from non-operating properties |
118
|
1,550
|
4,647
|
2,243
|
|
| Defense/Information Technology Locations | Lackland Air Force Base | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
12,703
|
11,254
|
36,368
|
35,079
|
|
| Property operating expenses |
(7,149)
|
(6,432)
|
(19,756)
|
(20,524)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
5,554
|
4,822
|
16,612
|
14,555
|
|
| Additions to long-lived assets |
0
|
0
|
0
|
0
|
|
| Transfers from non-operating properties |
2,120
|
0
|
10,456
|
0
|
|
| Defense/Information Technology Locations | Navy Support Locations | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
8,183
|
7,899
|
24,523
|
23,896
|
|
| Property operating expenses |
(3,581)
|
(3,208)
|
(10,271)
|
(9,943)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
4,602
|
4,691
|
14,252
|
13,953
|
|
| Additions to long-lived assets |
2,003
|
1,758
|
7,948
|
4,316
|
|
| Transfers from non-operating properties |
0
|
(17)
|
0
|
(17)
|
|
| Defense/Information Technology Locations | Redstone Arsenal | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
4,171
|
3,734
|
12,078
|
11,019
|
|
| Property operating expenses |
(1,717)
|
(1,569)
|
(4,855)
|
(4,518)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
2,454
|
2,165
|
7,223
|
6,501
|
|
| Additions to long-lived assets |
446
|
33
|
1,282
|
463
|
|
| Transfers from non-operating properties |
4,152
|
13
|
13,363
|
483
|
|
| Defense/Information Technology Locations | Data Center Shells | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
5,913
|
6,689
|
21,891
|
18,475
|
|
| Property operating expenses |
(518)
|
(574)
|
(1,630)
|
(2,167)
|
|
| UJV NOI allocable to COPT |
1,601
|
1,206
|
4,071
|
3,607
|
|
| NOI from real estate operations |
6,996
|
7,321
|
24,332
|
19,915
|
|
| Additions to long-lived assets |
0
|
0
|
0
|
0
|
|
| Transfers from non-operating properties |
9,483
|
30,286
|
122,115
|
61,075
|
|
| Regional Office | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
15,508
|
15,272
|
45,359
|
45,852
|
|
| Property operating expenses |
(7,343)
|
(7,425)
|
(22,349)
|
(22,472)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
8,165
|
7,847
|
23,010
|
23,380
|
|
| Additions to long-lived assets |
6,339
|
5,670
|
15,198
|
14,915
|
|
| 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 |
6,565
|
7,781
|
22,996
|
23,963
|
|
| Property operating expenses |
(3,374)
|
(3,965)
|
(9,830)
|
(12,373)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
3,191
|
3,816
|
13,166
|
11,590
|
|
| Additions to long-lived assets |
61
|
370
|
312
|
487
|
|
| Transfers from non-operating properties |
(1,012)
|
155
|
(1,012)
|
2,300
|
|
| Other | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
704
|
1,003
|
2,208
|
2,334
|
|
| Property operating expenses |
(324)
|
(802)
|
(981)
|
(1,040)
|
|
| UJV NOI allocable to COPT |
0
|
0
|
0
|
0
|
|
| NOI from real estate operations |
380
|
201
|
1,227
|
1,294
|
|
| Additions to long-lived assets |
19
|
(88)
|
63
|
227
|
|
| Transfers from non-operating properties |
0
|
0
|
0
|
0
|
|
| Segment assets |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
3,024,072
|
3,074,986
|
3,024,072
|
3,074,986
|
|
| Segment assets | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
3,024,072
|
3,074,986
|
3,024,072
|
3,074,986
|
|
| Segment assets | Defense/Information Technology Locations | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
2,421,067
|
2,455,324
|
2,421,067
|
2,455,324
|
|
| Segment assets | Defense/Information Technology Locations | Fort Meade/BW Corridor | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
1,271,668
|
1,280,837
|
1,271,668
|
1,280,837
|
|
| Segment assets | Defense/Information Technology Locations | Northern Virginia Defense/IT | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
398,137
|
394,066
|
398,137
|
394,066
|
|
| Segment assets | Defense/Information Technology Locations | Lackland Air Force Base | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
147,505
|
126,047
|
147,505
|
126,047
|
|
| Segment assets | Defense/Information Technology Locations | Navy Support Locations | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
186,243
|
189,406
|
186,243
|
189,406
|
|
| Segment assets | Defense/Information Technology Locations | Redstone Arsenal | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
118,839
|
105,315
|
118,839
|
105,315
|
|
| Segment assets | Defense/Information Technology Locations | Data Center Shells | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
298,675
|
359,653
|
298,675
|
359,653
|
|
| Segment assets | Regional Office | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
393,747
|
396,624
|
393,747
|
396,624
|
|
| Segment assets | Operating wholesale data center | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
205,550
|
219,041
|
205,550
|
219,041
|
|
| Segment assets | Other | Real estate operations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
$ 3,708
|
$ 3,997
|
$ 3,708
|
$ 3,997
|
|