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Organization (Details)
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Mar. 31, 2015
Property
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| Debt in default of payment terms | Northern Virginia | Wholly owned subsidiary | |
| Investments in real estate | |
| Number of real estate properties |
2us-gaap_NumberOfRealEstateProperties / us-gaap_DebtInstrumentAxis = ofc_DebtinDefaultofPaymentTermsMember / dei_LegalEntityAxis = ofc_WhollyOwnedSubsidiaryMember / us-gaap_StatementGeographicalAxis = ofc_NorthernVirginiaMember |
| Operating office properties | |
| Investments in real estate | |
| Number of real estate properties |
178us-gaap_NumberOfRealEstateProperties / ofc_RealEstatePropertiesStatusAxis = ofc_OperatingOfficePropertiesMember |
| Square footage of real estate properties (in square feet) |
17,700,000us-gaap_AreaOfRealEstateProperty / ofc_RealEstatePropertiesStatusAxis = ofc_OperatingOfficePropertiesMember |
| Office properties under, or contractually committed for, construction or approved for redevelopment | |
| Investments in real estate | |
| Number of real estate properties |
12us-gaap_NumberOfRealEstateProperties / ofc_RealEstatePropertiesStatusAxis = ofc_OfficePropertiesUnderConstructionRedevelopmentOrContractuallyCommittedForConstructionMember |
| Square footage of real estate properties (in square feet) |
1,400,000us-gaap_AreaOfRealEstateProperty / ofc_RealEstatePropertiesStatusAxis = ofc_OfficePropertiesUnderConstructionRedevelopmentOrContractuallyCommittedForConstructionMember |
| Partially operational properties | |
| Investments in real estate | |
| Number of real estate properties |
1us-gaap_NumberOfRealEstateProperties / ofc_RealEstatePropertiesStatusAxis = ofc_PartiallyOperationalPropertiesMember |
| Land controlled for future development | |
| Investments in real estate | |
| Square footage of real estate properties (in square feet) |
1,402us-gaap_AreaOfRealEstateProperty / ofc_RealEstatePropertiesStatusAxis = ofc_LandControlledforFutureDevelopmentMember |
| Developable square feet |
17,600,000ofc_DevelopableSquareFeet / ofc_RealEstatePropertiesStatusAxis = ofc_LandControlledforFutureDevelopmentMember |
| Partially operational, wholesale data center | |
| Investments in real estate | |
| The expected stabilization critical load after completion of development (in megawatts) |
19.25ofc_ExpectedStabilizationCriticalLoad / ofc_RealEstatePropertiesStatusAxis = ofc_PartiallyOperationalWholesaleDataCenterMember |
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- Definition
The amount of square feet into which a land parcel is potentially developable. No definition available.
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- Definition
Represents the expected stabilization critical load after completion of development of the property. Critical load is the amount of megawatts of power made available for the exclusive use tenants in the property. No definition available.
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- Definition
Area of a real estate property. No definition available.
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- Definition
The number of real estate properties owned as of the balance sheet date. No definition available.
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