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Fair Value Measurements (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
12 Months Ended | |||
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Dec. 31, 2012
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2011
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| KEYW Holding Corporation | ||||
| Warrants | ||||
| Number of warrants owned (in shares) |
50,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = ofc_KeywHoldingCorporationMember |
50,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = ofc_KeywHoldingCorporationMember |
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| Exercise price of warrants (in dollars per share) |
9.25ofc_ClassOfWarrantsExercisePriceOfWarrants / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = ofc_KeywHoldingCorporationMember |
9.25ofc_ClassOfWarrantsExercisePriceOfWarrants / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = ofc_KeywHoldingCorporationMember |
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| Number of shares owned in investee (in shares) |
1,900,000us-gaap_InvestmentOwnedBalanceShares / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = ofc_KeywHoldingCorporationMember |
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| Percentage of common stock owned |
7.00%ofc_TradingSecurityOwnershipPercentage / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = ofc_KeywHoldingCorporationMember |
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| Amount of sale of owned shares |
$ 14.0ofc_TradingSecurityInvestmentSaleValueofShares / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = ofc_KeywHoldingCorporationMember |
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| Revenue earned from investee |
$ 2.4us-gaap_RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = ofc_KeywHoldingCorporationMember |
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| Redeemable non-controlling interest | Fair value measurement on a recurring basis | Significant Unobservable Inputs (Level 3) | ||||
| Warrants | ||||
| Discount rate |
15.50%us-gaap_FairValueInputsDiscountRate / us-gaap_BalanceSheetLocationAxis = ofc_RedeemableNonControllingInterestMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember |
15.50%us-gaap_FairValueInputsDiscountRate / us-gaap_BalanceSheetLocationAxis = ofc_RedeemableNonControllingInterestMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember |
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| X | ||||||||||
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- Definition
Class of Warrants, Exercise Price of Warrants No definition available.
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- Definition
Represents the value of shares of common stock owned in the investee accounted for as a trading security that were sold. No definition available.
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- Definition
The percentage of ownership of common stock or equity participation in the investee accounted for as a trading security No definition available.
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| X | ||||||||||
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- Definition
Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Balance held at close of period in number of shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Reflects the sum of all other revenue and income realized from sales and other transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party during the period. No definition available.
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- Details
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- Details
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- Details
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