Information by Business Segment (Details) - USD ($)
$ in Thousands |
3 Months Ended |
6 Months Ended |
|
Jun. 30, 2017 |
Jun. 30, 2016 |
Jun. 30, 2017 |
Jun. 30, 2016 |
Dec. 31, 2016 |
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
$ 128,297
|
$ 133,924
|
$ 255,064
|
$ 267,011
|
|
| Property operating expenses |
(48,628)
|
(48,141)
|
(97,147)
|
(100,016)
|
|
| UJV NOI allocable to COPT |
1,294
|
0
|
2,592
|
0
|
|
| NOI from real estate operations |
80,963
|
85,783
|
160,509
|
166,995
|
|
| Additions to long-lived assets |
15,155
|
15,022
|
32,195
|
29,423
|
|
| Transfers from non-operating properties |
46,742
|
58,348
|
59,387
|
120,441
|
|
| Segment assets |
3,574,887
|
3,841,692
|
3,574,887
|
3,841,692
|
$ 3,780,885
|
| Defense/Information Technology Locations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
102,281
|
102,097
|
202,469
|
203,327
|
|
| Property operating expenses |
(37,571)
|
(35,990)
|
(74,584)
|
(74,509)
|
|
| UJV NOI allocable to COPT |
1,294
|
|
2,592
|
|
|
| NOI from real estate operations |
66,004
|
66,107
|
130,477
|
128,818
|
|
| Additions to long-lived assets |
9,161
|
12,689
|
17,351
|
24,174
|
|
| Transfers from non-operating properties |
46,767
|
58,804
|
59,386
|
120,775
|
|
| Defense/Information Technology Locations | Fort Meade/BW Corridor |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
61,284
|
60,912
|
122,139
|
123,421
|
|
| Property operating expenses |
(20,129)
|
(20,378)
|
(40,649)
|
(43,624)
|
|
| UJV NOI allocable to COPT |
0
|
|
0
|
|
|
| NOI from real estate operations |
41,155
|
40,534
|
81,490
|
79,797
|
|
| Additions to long-lived assets |
5,853
|
7,096
|
9,275
|
13,615
|
|
| Transfers from non-operating properties |
18,159
|
768
|
31,575
|
36,519
|
|
| Defense/Information Technology Locations | Northern Virginia Defense/IT |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
11,095
|
12,057
|
22,802
|
24,173
|
|
| Property operating expenses |
(4,219)
|
(4,307)
|
(8,671)
|
(8,848)
|
|
| UJV NOI allocable to COPT |
0
|
|
0
|
|
|
| NOI from real estate operations |
6,876
|
7,750
|
14,131
|
15,325
|
|
| Additions to long-lived assets |
977
|
3,059
|
3,445
|
6,137
|
|
| Transfers from non-operating properties |
218
|
27,944
|
440
|
27,850
|
|
| Defense/Information Technology Locations | Lackland Air Force Base |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
13,029
|
11,651
|
24,663
|
21,876
|
|
| Property operating expenses |
(8,130)
|
(6,844)
|
(14,932)
|
(12,264)
|
|
| UJV NOI allocable to COPT |
0
|
|
0
|
|
|
| NOI from real estate operations |
4,899
|
4,807
|
9,731
|
9,612
|
|
| Additions to long-lived assets |
16
|
0
|
16
|
0
|
|
| Transfers from non-operating properties |
0
|
231
|
0
|
237
|
|
| Defense/Information Technology Locations | Navy Support Locations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
7,449
|
6,998
|
14,459
|
13,932
|
|
| Property operating expenses |
(3,025)
|
(2,675)
|
(6,234)
|
(6,199)
|
|
| UJV NOI allocable to COPT |
0
|
|
0
|
|
|
| NOI from real estate operations |
4,424
|
4,323
|
8,225
|
7,733
|
|
| Additions to long-lived assets |
2,231
|
2,233
|
4,399
|
3,503
|
|
| Transfers from non-operating properties |
466
|
0
|
466
|
0
|
|
| Defense/Information Technology Locations | Redstone Arsenal |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
3,624
|
3,191
|
7,084
|
6,307
|
|
| Property operating expenses |
(1,491)
|
(960)
|
(2,862)
|
(1,938)
|
|
| UJV NOI allocable to COPT |
0
|
|
0
|
|
|
| NOI from real estate operations |
2,133
|
2,231
|
4,222
|
4,369
|
|
| Additions to long-lived assets |
84
|
301
|
216
|
919
|
|
| Transfers from non-operating properties |
1,709
|
4
|
1,705
|
215
|
|
| Defense/Information Technology Locations | Data Center Shells |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
5,800
|
7,288
|
11,322
|
13,618
|
|
| Property operating expenses |
(577)
|
(826)
|
(1,236)
|
(1,636)
|
|
| UJV NOI allocable to COPT |
1,294
|
|
2,592
|
|
|
| NOI from real estate operations |
6,517
|
6,462
|
12,678
|
11,982
|
|
| Additions to long-lived assets |
0
|
0
|
0
|
0
|
|
| Transfers from non-operating properties |
26,215
|
29,857
|
25,200
|
55,954
|
|
| Regional Office |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
17,462
|
23,283
|
35,738
|
46,785
|
|
| Property operating expenses |
(7,082)
|
(8,721)
|
(14,568)
|
(18,552)
|
|
| UJV NOI allocable to COPT |
0
|
|
0
|
|
|
| NOI from real estate operations |
10,380
|
14,562
|
21,170
|
28,233
|
|
| Additions to long-lived assets |
4,018
|
2,180
|
11,138
|
4,939
|
|
| Transfers from non-operating properties |
(25)
|
26
|
(25)
|
108
|
|
| Operating wholesale data centers |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
7,033
|
6,804
|
13,803
|
13,297
|
|
| Property operating expenses |
(3,501)
|
(2,651)
|
(6,866)
|
(5,312)
|
|
| UJV NOI allocable to COPT |
0
|
|
0
|
|
|
| NOI from real estate operations |
3,532
|
4,153
|
6,937
|
7,985
|
|
| Additions to long-lived assets |
2,005
|
0
|
3,579
|
0
|
|
| Transfers from non-operating properties |
0
|
(482)
|
8
|
(431)
|
|
| Other Segments |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Revenues from real estate operations |
1,521
|
1,740
|
3,054
|
3,602
|
|
| Property operating expenses |
(474)
|
(779)
|
(1,129)
|
(1,643)
|
|
| UJV NOI allocable to COPT |
0
|
|
0
|
|
|
| NOI from real estate operations |
1,047
|
961
|
1,925
|
1,959
|
|
| Additions to long-lived assets |
(29)
|
153
|
127
|
310
|
|
| Transfers from non-operating properties |
0
|
0
|
18
|
(11)
|
|
| Segment assets |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
2,975,661
|
3,289,117
|
2,975,661
|
3,289,117
|
|
| Segment assets | Defense/Information Technology Locations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
2,291,688
|
2,421,850
|
2,291,688
|
2,421,850
|
|
| Segment assets | Defense/Information Technology Locations | Fort Meade/BW Corridor |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
1,267,635
|
1,305,769
|
1,267,635
|
1,305,769
|
|
| Segment assets | Defense/Information Technology Locations | Northern Virginia Defense/IT |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
357,747
|
424,441
|
357,747
|
424,441
|
|
| Segment assets | Defense/Information Technology Locations | Lackland Air Force Base |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
130,431
|
133,359
|
130,431
|
133,359
|
|
| Segment assets | Defense/Information Technology Locations | Navy Support Locations |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
195,732
|
195,195
|
195,732
|
195,195
|
|
| Segment assets | Defense/Information Technology Locations | Redstone Arsenal |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
109,586
|
106,810
|
109,586
|
106,810
|
|
| Segment assets | Defense/Information Technology Locations | Data Center Shells |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
230,557
|
256,276
|
230,557
|
256,276
|
|
| Segment assets | Regional Office |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
435,399
|
594,750
|
435,399
|
594,750
|
|
| Segment assets | Operating wholesale data centers |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
229,224
|
237,226
|
229,224
|
237,226
|
|
| Segment assets | Other Segments |
|
|
|
|
|
| Segment financial information for real estate operations |
|
|
|
|
|
| Segment assets |
$ 19,350
|
$ 35,291
|
$ 19,350
|
$ 35,291
|
|