XML 55 R38.htm IDEA: XBRL DOCUMENT
v3.4.0.3

Fair Value Measurements (Details) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2016 USD ($) joint_venture
Assets and liabilities measured at fair value on a recurring basis |
Number of joint ventures with redeemable noncontrolling interests | joint_venture | 2
Deferred compensation plan | Management |
Assets and liabilities measured at fair value on a recurring basis |
Maximum percentage of participants' compensation which is deferrable (as a percent) | 100.00%
Balance of the plan which was fully funded | $ | $ 5.7

X
- Definition Represents the maximum percentage of participants' compensation that is deferrable by participants under the deferred compensation plan. + References No definition available. + Details
Name: | ofc_DeferredCompensationArrangementWithIndividualMaximumDeferrablePercentageOfCompensation
Namespace Prefix: | ofc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Joint Ventures With Redeemable Noncontrolling Interests + References No definition available. + Details
Name: | ofc_NumberofJointVenturesWithRedeemableNoncontrollingInterests
Namespace Prefix: | ofc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying amount as of the balance sheet date of assets held under deferred compensation agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DeferredCompensationPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis=us-gaap_DeferredCompensationExcludingShareBasedPaymentsAndRetirementBenefitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=us-gaap_ManagementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |