Quarterly Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2021 |
Sep. 30, 2021 |
Jun. 30, 2021 |
Mar. 31, 2021 |
Dec. 31, 2020 |
Sep. 30, 2020 |
Jun. 30, 2020 |
Mar. 31, 2020 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
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| Quarterly Financial Information Disclosure [Abstract] | ||||||||||||||||
| Total revenues | $ 185,932 | $ 166,919 | $ 157,207 | $ 154,388 | $ 156,607 | $ 148,801 | $ 138,321 | $ 138,625 | $ 664,446 | $ 582,354 | $ 611,821 | |||||
| (Loss) income from continuing operations | 13,552 | 28,343 | 43,219 | (6,894) | 82,182 | (30,991) | 24,984 | 24,426 | 78,220 | 100,601 | 195,354 | |||||
| Discontinued operations | 1,413 | 451 | 679 | 815 | 1,367 | (351) | 137 | 1,124 | 3,358 | 2,277 | 4,650 | |||||
| Net income | 14,965 | 28,794 | 43,898 | (6,079) | 83,549 | (31,342) | 25,121 | 25,550 | $ 81,578 | $ 102,878 | $ 200,004 | |||||
| Net income attributable to noncontrolling interests in consolidated entities | (1,257) | (1,693) | (1,497) | (590) | (1,881) | (503) | (1,624) | (1,496) | ||||||||
| Net income attributable to COPT common shareholders | $ 13,708 | $ 27,101 | $ 42,401 | $ (6,669) | $ 81,668 | $ (31,845) | $ 23,497 | $ 24,054 | ||||||||
| Basic EPS (in dollars per share) | $ 0.12 | $ 0.24 | $ 0.38 | $ (0.06) | $ 0.73 | $ (0.29) | $ 0.21 | $ 0.21 | $ 0.68 | [1] | $ 0.87 | [1] | $ 1.72 | [1] | ||
| Diluted EPS (in dollars per share) | $ 0.12 | $ 0.24 | $ 0.38 | $ (0.06) | $ 0.73 | $ (0.29) | $ 0.21 | $ 0.21 | $ 0.68 | [1] | $ 0.87 | [1] | $ 1.71 | [1] | ||
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount after tax of income (loss) from continuing operations including portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of Net Income (Loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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