XML 18 R46.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Fair Value Measurements (Details 4) (USD $) | 9 Months Ended
--- | ---
Sep. 30, 2012
Discounted cash flow |  |
Quantitative information for significant unobservable inputs used for Level 3 fair value measurements |  |
Market rent growth rate | 3.00% | [1]
Expense growth rate | 3.00% | [1]
Yield Analysis |  |
Quantitative information for significant unobservable inputs used for Level 3 fair value measurements |  |
Yield | 12.00% | [1]
Market rent rate (in dollars per square foot) | 8.50 | [1]
Leasing costs per square foot | 20.00 | [1]
Maximum | Discounted cash flow |  |
Quantitative information for significant unobservable inputs used for Level 3 fair value measurements |  |
Discount rate | 11.00% |
Terminal captitalization rate | 10.00% |
Weighted Average | Discounted cash flow |  |
Quantitative information for significant unobservable inputs used for Level 3 fair value measurements |  |
Discount rate | 10.40% |
Terminal captitalization rate | 8.90% |
Minimum | Discounted cash flow |  |
Quantitative information for significant unobservable inputs used for Level 3 fair value measurements |  |
Discount rate | 10.10% |
Terminal captitalization rate | 8.70% |
[1] | Only one value applied to this unobservable input.

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

X
- Definition The discount rate used to estimate the fair value of the related assets. + References No definition available. + Details
Name: | ofc_FairValueInputsDiscountRate
Namespace Prefix: | ofc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the expense growth rate , used as an input to measure the fair value. + References No definition available. + Details
Name: | ofc_FairValueInputsExpenseGrowthRate
Namespace Prefix: | ofc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the leasing costs per square foot, used as an input to measure fair value. + References No definition available. + Details
Name: | ofc_FairValueInputsLeasingCostsPerSquareFoot
Namespace Prefix: | ofc_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the market rent growth rate, used as an input to measure fair value. + References No definition available. + Details
Name: | ofc_FairValueInputsMarketRentGrowthRate
Namespace Prefix: | ofc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the market rent rate, used as an input to measure fair value, per square foot, in dollars + References No definition available. + Details
Name: | ofc_FairValueInputsMarketRentRatePerSquareFoot
Namespace Prefix: | ofc_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the terminal capitalization rate, used as an input to measure the fair value. + References No definition available. + Details
Name: | ofc_FairValueInputsTerminalCaptitalizationRate
Namespace Prefix: | ofc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the yield, used as an input to measure fair value. + References No definition available. + Details
Name: | ofc_FairValueInputsYield
Namespace Prefix: | ofc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration