Information by Business Segment (Details 3) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Segment Reporting [Abstract] | |||||||||||
| NOI from real estate operations | $ 324,204 | $ 330,739 | $ 324,580 | ||||||||
| NOI from service operations | 3,222 | 2,883 | 3,706 | ||||||||
| Interest and other income | 6,318 | 5,444 | 4,517 | ||||||||
| Equity in income of unconsolidated entities | 2,882 | 1,332 | 62 | ||||||||
| Income tax expense | (1,098) | (244) | (199) | ||||||||
| Depreciation and other amortization associated with real estate operations | (134,228) | (132,719) | (140,025) | ||||||||
| Impairment losses | (15,123) | (101,391) | (23,289) | ||||||||
| General, administrative and leasing expenses | (30,837) | (36,553) | (31,361) | ||||||||
| Business development expenses and land carry costs | (6,213) | (8,244) | (13,507) | ||||||||
| Interest expense | (76,983) | (83,163) | (89,074) | ||||||||
| NOI from discontinued operations | 0 | 0 | (10) | ||||||||
| UJV NOI allocable to COPT | 5,188 | 2,305 | 0 | ||||||||
| (Loss) gain on early extinguishment of debt | (513) | (1,110) | 85,275 | ||||||||
| COPT consolidated income (loss) from continuing operations | $ 6,904 | $ 21,494 | $ 19,195 | $ 18,850 | $ 19,718 | $ (4,829) | $ (48,316) | $ 8,096 | $ 66,443 | $ (25,331) | $ 120,675 |
| X | ||||||||||
- Definition The current period expense charged against earnings on long-lived, physical real estate operations assets, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset or deferred costs associated with real estate operations over the benefit period of such asset or costs; or to reflect consumption during the period of an asset that is not used in production. No definition available.
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| X | ||||||||||
- Definition Amount of operating income or loss, excluding depreciation and amortization, attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period. No definition available.
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- Definition Represents the computation of NOI from service operations, which is the difference between Construction contract and other service revenues and Construction contract and other service expenses. No definition available.
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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. No definition available.
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- Definition Unconsolidated Joint Venture Net Operating Income Allocable to Parent No definition available.
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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Business development involves the development of products and services, their delivery, design and their implementation. Business development includes a number of techniques designed to grow an economic enterprise. Such techniques include, but are not limited to, assessments of marketing opportunities and target markets, intelligence gathering on customers and competitors, generating leads for possible sales, follow-up sales activity, formal proposal writing and business model design. Business development involves evaluating a business and then realizing its full potential, using such tools as marketing, sales, information management and customer service. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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/presentationRef
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- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Interest and debt related expenses associated with nonoperating financing activities of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of income related to nonoperating activities, classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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