XML 77 R49.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Properties, net (Details 3) (USD $) | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended |  | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 Greater Philadelphia | Sep. 30, 2012 Greater Philadelphia | Sep. 30, 2012 Colorado Springs | Sep. 30, 2012 Non-operating Properties | Sep. 30, 2012 400 Professional Drive | Jul. 02, 2012 Secured Debt [Member] 400 Professional Drive | Sep. 30, 2012 Operating properties | Jun. 30, 2012 Operating properties | Mar. 31, 2012 Operating properties | Sep. 30, 2012 Operating properties sqft buillding | Sep. 30, 2012 Operating properties White Marsh Portfolio sqft buillding | Sep. 30, 2012 Operating properties 1101 Sentry Gateway sqft buillding | Sep. 30, 2012 Operating properties 222 and 224 Schilling Circle sqft buillding | Sep. 30, 2012 Operating properties 15 and 45 West Gude Drive buillding sqft | Sep. 30, 2012 Operating properties 11800 Tech Road sqft buillding | Sep. 30, 2012 Operating properties 400 Professional Drive buillding sqft | Sep. 30, 2012 Operating properties July 2012 Portfolio Disposition sqft buillding | Sep. 30, 2012 Non-operating Properties | Jun. 30, 2012 Non-operating Properties | Mar. 31, 2012 Non-operating Properties | Sep. 30, 2012 Non-operating Properties | Sep. 30, 2012 Properties, net Significant Unobservable Inputs (Level 3) Fair value measurement on a nonrecurring basis | Sep. 30, 2012 Properties, net Significant Unobservable Inputs (Level 3) Fair value measurement on a nonrecurring basis
Dispositions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Charges, Continuing and Noncontinuing Operations Including Exit Costs | $ 55,829,000 | $ 2,354,000 | $ 6,587,000 |  | $ 64,770,000 |  |  |  |  |  |  |  | $ 55,829,000 | $ 2,354,000 | $ 11,833,000 | $ 70,016,000 |  |  |  |  |  |  |  | $ 0 | $ 0 | $ (5,246,000) | $ (5,246,000) |  |
Debt setttled through the surrender of real estate assets |  |  |  |  |  |  |  |  |  |  |  | 15,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of real estate disposed in settlement of debt |  |  |  |  |  |  |  |  |  |  |  | 11,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on early extinguishment of debt | (768,000) |  |  | (1,611,000) | (937,000) | (1,636,000) |  |  |  |  | 3,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment on Dispostion of Additional Property |  |  |  |  | 5,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected future redevelopment expenditure |  |  |  |  |  |  |  | 25,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Buildings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 35 | 5 | 1 | 2 | 2 | 1 | 1 | 23 |  |  |  |  |  |
Total Rentable Square Feet |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,302,000 | 163,000 | 95,000 | 56,000 | 231,000 | 240,000 | 130,000 | 1,387,000 |  |  |  |  |  |
Sale Price of Operating Properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 285,506,000 | 19,100,000 | 13,500,000 | 4,400,000 | 49,107,000 | 21,300,000 | 16,198,000 | 161,901,000 |  |  |  |  |  |
Sale Price of Non-operating Properties |  |  |  |  |  |  |  |  |  | 28,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 21,194,000 | 2,445,000 | 1,739,000 | 102,000 | 0 | 0 | 0 | 16,908,000 |  |  |  |  |  |
Disposals and Impairment Losses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate net impairment losses recognized in connection with disposition plan |  |  |  |  | 18,700,000 |  | 46,100,000 |  | 6,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate net impairment losses recognized in discontinued operation in connection with disposition plan |  |  |  |  | 23,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exit Costs Included in Impairment Losses in Connection with Dispositions |  |  |  |  | $ (4,066,000) | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,900,000 | $ 4,200,000

X
- Definition The charge against earnings from continuing and noncontinuing operations resulting from the aggregate write down of all assets from their carrying value to their fair value. + References No definition available. + Details
Name: | ofc_AssetImpairmentChargesContinuingAndNoncontinuingOperationsIncludingExitCosts
Namespace Prefix: | ofc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the carrying value of debt settled through the surrender of real estate assets. + References No definition available. + Details
Name: | ofc_CarryingValueOfDebtSettledThroughSurrenderOfRealEstateAssets
Namespace Prefix: | ofc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Expected future expenditure on redevelopment of properties. + References No definition available. + Details
Name: | ofc_Futureexpenditureredevelopment
Namespace Prefix: | ofc_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the total gain recognized on properties sold during the period. + References No definition available. + Details
Name: | ofc_GainOnSaleOfPropertiesSold
Namespace Prefix: | ofc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ofc_ImpairmentLossesAbstract
Namespace Prefix: | ofc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the aggregate net impairment loss recognized during the period in connection with disposition plan, including amounts in continuing and discontinued operations. + References No definition available. + Details
Name: | ofc_ImpairmentOfPropertiesInConnectionWithDispositionPlanAggregate
Namespace Prefix: | ofc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the aggregate net impairment loss recognized during the period in connection with disposition plan that is included in discontinued operations. + References No definition available. + Details
Name: | ofc_ImpairmentOfPropertiesInConnectionWithDispositionPlanInDiscontinuedOperations
Namespace Prefix: | ofc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the impairment loss recognized during the period related to disposition of additional property, including amounts in continuing and discontinued operations. + References No definition available. + Details
Name: | ofc_ImpairmentOnDispostionOfAdditionalProperty
Namespace Prefix: | ofc_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of properties sold during the period. + References No definition available. + Details
Name: | ofc_NumberOfPropertiesSold
Namespace Prefix: | ofc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the cash out flow for exit costs included in aggregate net impairment loss recognized during the period in connection with dispositions. + References No definition available. + Details
Name: | ofc_PaymentsOfExitCostsIncludedInImpairmentLossesInConnectionWithDispositions
Namespace Prefix: | ofc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the fair value of real estate assets disposed in settlement of debt through surrender or foreclosure. + References No definition available. + Details
Name: | ofc_RealEstateDispositionSatisfactionOfDebt
Namespace Prefix: | ofc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the total sales price of non-operating properties sold during the period. + References No definition available. + Details
Name: | ofc_SalesPriceOfNonOperatingPropertiesSold
Namespace Prefix: | ofc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the total sales price of operating properties sold during the period. + References No definition available. + Details
Name: | ofc_SalesPriceOfOperatingPropertiesSold
Namespace Prefix: | ofc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ofc_SignificantDisposalsLineItems
Namespace Prefix: | ofc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount represents the difference between the fair value of the payments made and the carrying amount of the debt at the time of its extinguishment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12355-112629 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 26 -Paragraph 20, 21 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12317-112629 + Details
Name: | us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of square footage related to a real estate property. + References No definition available. + Details
Name: | us-gaap_SquareFootageOfRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration