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Information by Business Segment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Segment financial information for real estate operations |  |  |
Revenues from real estate operations | $ 525,964 | $ 519,068 | $ 479,711
Property operating expenses | (197,530) | (194,488) | (179,799)
UJV NOI allocable to COPT | 2,305 | 0 | 0
NOI from real estate operations | 330,739 | 324,580 | 299,912
Additions to long-lived assets | 70,324 | 335,269 | 64,601
Transfers from non-operating properties | 184,640 | 307,120 | 141,899
Segment assets | 3,780,885 | 3,909,312 |
Defense/Information Technology Sector [Member] |  |  |
Segment financial information for real estate operations |  |  |
Revenues from real estate operations | 406,210 | 394,283 | 376,742
Property operating expenses | (148,705) | (144,444) | (137,486)
UJV NOI allocable to COPT | 2,305 |  |
NOI from real estate operations | 259,810 | 249,839 | 239,256
Additions to long-lived assets | 57,131 | 130,670 | 45,379
Transfers from non-operating properties | 184,943 | 194,647 | 121,227
Segment assets | 2,308,189 | 2,342,746 | 2,188,021
Defense/Information Technology Sector [Member] | Fort Meade/BW Corridor [Member] |  |  |
Segment financial information for real estate operations |  |  |
Revenues from real estate operations | 245,354 | 244,274 | 233,764
Property operating expenses | (83,684) | (83,309) | (80,824)
UJV NOI allocable to COPT | 0 |  |
NOI from real estate operations | 161,670 | 160,965 | 152,940
Additions to long-lived assets | 26,267 | 31,883 | 24,173
Transfers from non-operating properties | 49,937 | 45,560 | 56,699
Segment assets | 1,255,230 | 1,290,028 | 1,264,353
Defense/Information Technology Sector [Member] | Northern Virginia Defense/IT [Member] |  |  |
Segment financial information for real estate operations |  |  |
Revenues from real estate operations | 48,964 | 49,199 | 48,313
Property operating expenses | (17,824) | (20,107) | (19,071)
UJV NOI allocable to COPT | 0 |  |
NOI from real estate operations | 31,140 | 29,092 | 29,242
Additions to long-lived assets | 17,344 | 90,248 | 7,119
Transfers from non-operating properties | 28,230 | 50,690 | 360
Segment assets | 404,438 | 411,196 | 372,041
Defense/Information Technology Sector [Member] | Lackland Air Force Base [Member] |  |  |
Segment financial information for real estate operations |  |  |
Revenues from real estate operations | 46,803 | 39,659 | 34,463
Property operating expenses | (27,357) | (22,004) | (19,677)
UJV NOI allocable to COPT | 0 |  |
NOI from real estate operations | 19,446 | 17,655 | 14,786
Additions to long-lived assets | 0 | 0 | 0
Transfers from non-operating properties | 240 | 32,307 | 0
Segment assets | 131,957 | 134,381 | 102,232
Defense/Information Technology Sector [Member] | Navy Support Locations [Member] |  |  |
Segment financial information for real estate operations |  |  |
Revenues from real estate operations | 28,197 | 28,177 | 31,335
Property operating expenses | (12,690) | (13,229) | (12,576)
UJV NOI allocable to COPT | 0 |  |
NOI from real estate operations | 15,507 | 14,948 | 18,759
Additions to long-lived assets | 9,168 | 7,656 | 10,010
Transfers from non-operating properties | 0 | 1,408 | 0
Segment assets | 196,486 | 196,090 | 195,972
Defense/Information Technology Sector [Member] | Redstone Arsenal [Member] |  |  |
Segment financial information for real estate operations |  |  |
Revenues from real estate operations | 13,056 | 11,228 | 10,446
Property operating expenses | (4,476) | (3,497) | (3,066)
UJV NOI allocable to COPT | 0 |  |
NOI from real estate operations | 8,580 | 7,731 | 7,380
Additions to long-lived assets | 4,352 | 883 | 4,077
Transfers from non-operating properties | 3,169 | 13,190 | 21,014
Segment assets | 110,395 | 108,038 | 97,209
Defense/Information Technology Sector [Member] | Data Center Shells [Member] |  |  |
Segment financial information for real estate operations |  |  |
Revenues from real estate operations | 23,836 | 21,746 | 18,421
Property operating expenses | (2,674) | (2,298) | (2,272)
UJV NOI allocable to COPT | 2,305 |  |
NOI from real estate operations | 23,467 | 19,448 | 16,149
Additions to long-lived assets | 0 | 0 | 0
Transfers from non-operating properties | 103,367 | 51,492 | 43,154
Segment assets | 209,683 | 203,013 | 156,214
Regional Office [Member] |  |  |
Segment financial information for real estate operations |  |  |
Revenues from real estate operations | 85,805 | 98,165 | 85,025
Property operating expenses | (34,095) | (36,165) | (31,427)
UJV NOI allocable to COPT | 0 |  |
NOI from real estate operations | 51,710 | 62,000 | 53,598
Additions to long-lived assets | 12,559 | 204,139 | 19,290
Transfers from non-operating properties | 82 | 22,313 | 17,942
Segment assets | 442,811 | 608,471 | 526,988
Operating wholesale data centers [Member] |  |  |
Segment financial information for real estate operations |  |  |
Revenues from real estate operations | 26,869 | 19,032 | 10,430
Property operating expenses | (11,512) | (10,402) | (7,286)
UJV NOI allocable to COPT | 0 |  |
NOI from real estate operations | 15,357 | 8,630 | 3,144
Additions to long-lived assets | 299 | 132 | 22
Transfers from non-operating properties | (377) | 89,745 | 1,108
Segment assets | 231,954 | 243,338 | 163,177
Other [Member] |  |  |
Segment financial information for real estate operations |  |  |
Revenues from real estate operations | 7,080 | 7,588 | 7,514
Property operating expenses | (3,218) | (3,477) | (3,600)
UJV NOI allocable to COPT | 0 |  |
NOI from real estate operations | 3,862 | 4,111 | 3,914
Additions to long-lived assets | 335 | 328 | (90)
Transfers from non-operating properties | (8) | 415 | 1,622
Segment assets | 21,293 | 70,914 | 73,309
Segment assets [Member] |  |  |
Segment financial information for real estate operations |  |  |
Segment assets | $ 3,004,247 | $ 3,265,469 | $ 2,951,495

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- Definition Includes real estate revenues and property operating expenses from continuing and discontinued operations; and the net of revenues and property operating expenses of real estate operations owned through unconsolidated joint ventures allocable to parent. + References No definition available. + Details
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