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v2.4.1.9

Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Net income | $ 14,735 us-gaap_ProfitLoss | $ 5,671 us-gaap_ProfitLoss
Other comprehensive loss |  |
Unrealized losses on interest rate derivatives | (3,474)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax | (2,123)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax
Other comprehensive loss | (2,701)us-gaap_OtherComprehensiveIncomeLossNetOfTax | (1,428)us-gaap_OtherComprehensiveIncomeLossNetOfTax
Comprehensive income | 12,034 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | 4,243 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
Comprehensive income attributable to noncontrolling interests | (1,329)us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest | (911)us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
Comprehensive income attributable to COPT | 10,705 us-gaap_ComprehensiveIncomeNetOfTax | 3,332 us-gaap_ComprehensiveIncomeNetOfTax
Interest Expense [Member] |  |
Other comprehensive loss |  |
Losses on interest rate derivatives included in interest expense | 773 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / us-gaap_IncomeStatementLocationAxis = us-gaap_InterestExpenseMember | 695 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / us-gaap_IncomeStatementLocationAxis = us-gaap_InterestExpenseMember
Corporate Office Properties, L.P. |  |
Net income | 14,735 us-gaap_ProfitLoss / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 5,671 us-gaap_ProfitLoss / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Other comprehensive loss |  |
Unrealized losses on interest rate derivatives | (3,474)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | (2,123)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Other comprehensive loss | (2,701)us-gaap_OtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | (1,428)us-gaap_OtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Comprehensive income | 12,034 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 4,243 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Comprehensive income attributable to noncontrolling interests | (873)us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | (782)us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Comprehensive income attributable to COPT | 11,161 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 3,461 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Corporate Office Properties, L.P. | Interest Expense [Member] |  |
Other comprehensive loss |  |
Losses on interest rate derivatives included in interest expense | $ 773 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / us-gaap_IncomeStatementLocationAxis = us-gaap_InterestExpenseMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | $ 695 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / us-gaap_IncomeStatementLocationAxis = us-gaap_InterestExpenseMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember

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