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Information by Business Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Segment financial information for real estate operations |  |  |  |  |
Revenues from real estate operations | $ 137,411 | $ 157,017 | $ 439,630 | $ 448,253 |
Property operating expenses | (49,340) | (46,368) | (149,737) | (143,515) |
UJV NOI allocable to COPT | 1,206 | 1,202 | 3,607 | 3,602 |
Operating income | 37,352 | 38,939 | 111,547 | 110,990 |
Segment assets | 3,650,366 | 3,576,841 | 3,650,366 | 3,576,841 | $ 3,595,205
Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Revenues from real estate operations | 128,988 | 127,231 | 386,428 | 382,295 |
Property operating expenses | (49,340) | (46,368) | (149,737) | (143,515) |
UJV NOI allocable to COPT | 1,206 | 1,202 | 3,607 | 3,602 |
Operating income | 80,854 | 82,065 | 240,298 | 242,382 |
Additions to long-lived assets | 21,259 | 16,628 | 52,322 | 48,823 |
Transfers from non-operating properties | 46,685 | 80,847 | 101,003 | 140,234 |
Defense/Information Technology Locations | Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Revenues from real estate operations | 104,932 | 102,170 | 314,279 | 304,639 |
Property operating expenses | (37,148) | (35,470) | (113,852) | (110,054) |
UJV NOI allocable to COPT | 1,206 | 1,202 | 3,607 | 3,602 |
Operating income | 68,990 | 67,902 | 204,034 | 198,187 |
Additions to long-lived assets | 15,307 | 11,205 | 36,693 | 28,556 |
Transfers from non-operating properties | 46,530 | 80,822 | 98,703 | 140,208 |
Defense/Information Technology Locations | Fort Meade/BW Corridor | Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Revenues from real estate operations | 61,396 | 61,254 | 186,171 | 183,393 |
Property operating expenses | (19,847) | (19,708) | (61,550) | (60,357) |
UJV NOI allocable to COPT | 0 | 0 | 0 | 0 |
Operating income | 41,549 | 41,546 | 124,621 | 123,036 |
Additions to long-lived assets | 11,211 | 5,810 | 26,483 | 15,085 |
Transfers from non-operating properties | 14,698 | 5,519 | 34,919 | 37,094 |
Defense/Information Technology Locations | Northern Virginia Defense/IT | Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Revenues from real estate operations | 13,960 | 12,190 | 39,639 | 34,992 |
Property operating expenses | (5,518) | (4,343) | (15,150) | (13,014) |
UJV NOI allocable to COPT | 0 | 0 | 0 | 0 |
Operating income | 8,442 | 7,847 | 24,489 | 21,978 |
Additions to long-lived assets | 2,305 | 2,587 | 5,431 | 6,032 |
Transfers from non-operating properties | 1,550 | 45,554 | 2,243 | 45,994 |
Defense/Information Technology Locations | Lackland Air Force Base | Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Revenues from real estate operations | 11,254 | 11,024 | 35,079 | 35,687 |
Property operating expenses | (6,432) | (6,193) | (20,524) | (21,125) |
UJV NOI allocable to COPT | 0 | 0 | 0 | 0 |
Operating income | 4,822 | 4,831 | 14,555 | 14,562 |
Additions to long-lived assets | 0 | 55 | 0 | 71 |
Transfers from non-operating properties | 0 | 0 | 0 | 0 |
Defense/Information Technology Locations | Navy Support Locations | Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Revenues from real estate operations | 7,899 | 7,494 | 23,896 | 21,953 |
Property operating expenses | (3,208) | (3,157) | (9,943) | (9,391) |
UJV NOI allocable to COPT | 0 | 0 | 0 | 0 |
Operating income | 4,691 | 4,337 | 13,953 | 12,562 |
Additions to long-lived assets | 1,758 | 1,910 | 4,316 | 6,309 |
Transfers from non-operating properties | (17) | 8 | (17) | 474 |
Defense/Information Technology Locations | Redstone Arsenal | Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Revenues from real estate operations | 3,734 | 3,532 | 11,019 | 10,616 |
Property operating expenses | (1,569) | (1,432) | (4,518) | (4,294) |
UJV NOI allocable to COPT | 0 | 0 | 0 | 0 |
Operating income | 2,165 | 2,100 | 6,501 | 6,322 |
Additions to long-lived assets | 33 | 843 | 463 | 1,059 |
Transfers from non-operating properties | 13 | (62) | 483 | 1,643 |
Defense/Information Technology Locations | Data Center Shells | Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Revenues from real estate operations | 6,689 | 6,676 | 18,475 | 17,998 |
Property operating expenses | (574) | (637) | (2,167) | (1,873) |
UJV NOI allocable to COPT | 1,206 | 1,202 | 3,607 | 3,602 |
Operating income | 7,321 | 7,241 | 19,915 | 19,727 |
Additions to long-lived assets | 0 | 0 | 0 | 0 |
Transfers from non-operating properties | 30,286 | 29,803 | 61,075 | 55,003 |
Regional Office | Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Revenues from real estate operations | 15,272 | 16,656 | 45,852 | 52,394 |
Property operating expenses | (7,425) | (7,406) | (22,472) | (21,974) |
UJV NOI allocable to COPT | 0 | 0 | 0 | 0 |
Operating income | 7,847 | 9,250 | 23,380 | 30,420 |
Additions to long-lived assets | 5,670 | 5,338 | 14,915 | 16,476 |
Transfers from non-operating properties | 0 | 25 | 0 | 0 |
Operating wholesale data centers | Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Revenues from real estate operations | 7,781 | 7,398 | 23,963 | 21,201 |
Property operating expenses | (3,965) | (3,175) | (12,373) | (10,041) |
UJV NOI allocable to COPT | 0 | 0 | 0 | 0 |
Operating income | 3,816 | 4,223 | 11,590 | 11,160 |
Additions to long-lived assets | 370 | 9 | 487 | 3,588 |
Transfers from non-operating properties | 155 | 0 | 2,300 | 8 |
Other Segments | Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Revenues from real estate operations | 1,003 | 1,007 | 2,334 | 4,061 |
Property operating expenses | (802) | (317) | (1,040) | (1,446) |
UJV NOI allocable to COPT | 0 | 0 | 0 | 0 |
Operating income | 201 | 690 | 1,294 | 2,615 |
Additions to long-lived assets | (88) | 76 | 227 | 203 |
Transfers from non-operating properties | 0 | 0 | 0 | 18 |
Segment assets |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Segment assets | 3,074,986 | 3,014,281 | 3,074,986 | 3,014,281 |
Segment assets | Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Segment assets | 3,074,986 | 3,014,281 | 3,074,986 | 3,014,281 |
Segment assets | Defense/Information Technology Locations | Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Segment assets | 2,455,324 | 2,375,446 | 2,455,324 | 2,375,446 |
Segment assets | Defense/Information Technology Locations | Fort Meade/BW Corridor | Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Segment assets | 1,280,837 | 1,265,569 | 1,280,837 | 1,265,569 |
Segment assets | Defense/Information Technology Locations | Northern Virginia Defense/IT | Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Segment assets | 394,066 | 400,855 | 394,066 | 400,855 |
Segment assets | Defense/Information Technology Locations | Lackland Air Force Base | Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Segment assets | 126,047 | 129,657 | 126,047 | 129,657 |
Segment assets | Defense/Information Technology Locations | Navy Support Locations | Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Segment assets | 189,406 | 194,801 | 189,406 | 194,801 |
Segment assets | Defense/Information Technology Locations | Redstone Arsenal | Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Segment assets | 105,315 | 108,884 | 105,315 | 108,884 |
Segment assets | Defense/Information Technology Locations | Data Center Shells | Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Segment assets | 359,653 | 275,680 | 359,653 | 275,680 |
Segment assets | Regional Office | Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Segment assets | 396,624 | 398,579 | 396,624 | 398,579 |
Segment assets | Operating wholesale data centers | Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Segment assets | 219,041 | 226,909 | 219,041 | 226,909 |
Segment assets | Other Segments | Real estate operations |  |  |  |  |
Segment financial information for real estate operations |  |  |  |  |
Segment assets | $ 3,997 | $ 13,347 | $ 3,997 | $ 13,347 |

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