Annual report pursuant to Section 13 and 15(d)

Prepaid Expenses and Other Assets (Details)

v2.4.1.9
Prepaid Expenses and Other Assets (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Prepaid Expense and Other Assets [Abstract]    
Prepaid expenses $ 20,570us-gaap_PrepaidExpenseCurrentAndNoncurrent $ 19,308us-gaap_PrepaidExpenseCurrentAndNoncurrent
Lease incentives 13,344us-gaap_IncentiveToLessee 8,435us-gaap_IncentiveToLessee
Construction contract costs incurred in excess of billings 6,656us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrPrograms 2,462us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrPrograms
Furniture, fixtures and equipment, net 6,637us-gaap_PropertyPlantAndEquipmentNet 6,556us-gaap_PropertyPlantAndEquipmentNet
Deferred tax asset, net 4,002us-gaap_DeferredTaxAssetsNet [1] 4,305us-gaap_DeferredTaxAssetsNet [1]
Operating notes receivable 3,797us-gaap_LoansAndLeasesReceivableNetReportedAmountOther 1,692us-gaap_LoansAndLeasesReceivableNetReportedAmountOther
Other equity method investments 2,368us-gaap_EquityMethodInvestments 2,258us-gaap_EquityMethodInvestments
Interest rate derivatives 274us-gaap_InterestRateCashFlowHedgeAssetAtFairValue 6,594us-gaap_InterestRateCashFlowHedgeAssetAtFairValue
Other assets 2,601us-gaap_OtherAssets 2,576us-gaap_OtherAssets
Prepaid expenses and other assets 60,249us-gaap_PrepaidExpenseAndOtherAssets 54,186us-gaap_PrepaidExpenseAndOtherAssets
Operating notes receivable    
Mortgage and Other Investing Receivables [Line Items]    
Operating notes receivables due from tenants with terms exceeding one year 3,600ofc_OperatingNotesReceivableLongTerm
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ofc_LongTermOperatingNotesReceivableMember
1,700ofc_OperatingNotesReceivableLongTerm
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ofc_LongTermOperatingNotesReceivableMember
Operating Notes Receivable Long-Term, Allowance for Estimated Losses $ 252us-gaap_AllowanceForNotesAndLoansReceivableNoncurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ofc_LongTermOperatingNotesReceivableMember
$ 87us-gaap_AllowanceForNotesAndLoansReceivableNoncurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ofc_LongTermOperatingNotesReceivableMember
[1] See Note 19 for further disclosure.