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Commitments and Contingencies (Details) (USD $) | 1 Months Ended |
--- | --- | ---
Aug. 31, 2010 | Dec. 31, 2014 Property
Tax incremental financing obligation |  |
The amount of tax incremental financing bonds issued by Anne Arundel County, Maryland | $ 30,000,000 ofc_TaxIncrementalFinancingBondsAmountIssuedByAnneArundelCountyMaryland |
Liability recognized with regard to tax incremental financing obligation at end of current period |  | 1,300,000 us-gaap_GuaranteeObligationsCurrentCarryingValue
Future minimum rental payments due: |  |
2015 |  | 905,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent
2016 |  | 839,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
2017 |  | 768,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
2018 |  | 735,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
2019 |  | 728,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears
Thereafter |  | 76,678,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter
Total |  | 80,653,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDue
Environmental Indemnity Agreement |  |
Number of lease properties which were provided environmental indemnifications |  | 3 ofc_PropertySubjectToEnvironmentalIndemnityLeaseAgreementNumberOfProperties
Environmental indemnification to the tenant against losses covered under prior owner's indemnity agreement |  | 5,000,000.0 ofc_EnvironmentalIndemnificationToTenantAgainstLossesCoveredUnderPriorOwnerIndemnityAgreementMaximum
Maximum environmental indemnification to the tenant against consequential damages after acquisition of property |  | 12,500,000.0 ofc_EnvironmentalIndemnificationToTenantAgainstConsequentialDamagesAfterAcquisitionOfPropertyMaximum
Additional costs agreed to be paid by the entity related to construction and environmental regulatory activities (as a percent) |  | 50.00%ofc_AdditionalCostsIncurredRelatedToConstructionAndEnvironmentalRegulatoryActivitiesPercentage
Maximum annual additional costs agreed to be paid by the entity related to construction and environmental regulatory activities |  | 300,000 ofc_AdditionalCostsIncurredRelatedToConstructionAndEnvironmentalRegulatoryActivitiesMaximumPerAnnum
Maximum additional costs agreed to be paid by the entity related to construction and environmental regulatory activities |  | $ 1,500,000.0 ofc_MaximumAdditionalCostsIncurredRelatedToConstructionAndEnvironmentalRegulatoryActivities

X
- Definition Represents the maximum annual additional costs agreed to be paid by the entity related to the construction and environmental regulatory activities incurred by the tenant as a result of the indemnified environmental condition of the properties. + References No definition available. + Details
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- Definition Represents the percentage of additional costs agreed to be paid by the entity related to the construction and environmental regulatory activities incurred by the tenant as a result of the indemnified environmental condition of the properties, subject to an annual and aggregate limits. + References No definition available. + Details
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- Definition Represents the maximum amount of environmental indemnification to the tenant against consequential damages after the acquisition of the property from the entity. + References No definition available. + Details
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- Definition Represents the maximum amount of environmental indemnification to the tenant against losses covered under an indemnity agreement of the prior owner of the property after the State of New Jersey declares the remediation complete. + References No definition available. + Details
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- Definition Represents the maximum additional costs agreed to be paid by the entity related to the construction and environmental regulatory activities incurred by the tenant as a result of the indemnified environmental condition of the properties. + References No definition available. + Details
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- Definition Represents the number of lease properties in New Jersey which were provided environmental indemnifications by the entity. + References No definition available. + Details
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- Definition The bond amounts issued by Anne Arundel County, Maryland to third-party investors in order to finance public improvements needed in connection with National Business Park North. + References No definition available. + Details
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- Definition The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
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- Definition Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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