XML 105 R86.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Share-Based Compensation and Other Compensation Matters - Percentile Grant and Assumptions (Details) - PB-PIUs - $ / shares |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 01, 2023 | Jan. 01, 2022 | Jan. 01, 2021 | Dec. 31, 2023
Potential earned payout for defined levels of performance under awards |  |  |  |
Earned payout (as a percent of PIUs granted) on 75th or greater percentile rank |  |  |  | 100.00%
Earned payout (as a percent of PIUs granted) on 50th percentile rank (target) |  |  |  | 50.00%
Earned payout (as a percent of PIUs granted) on 25th percentile rank |  |  |  | 25.00%
Earned payout (as a percent of PIUs granted) on below 25th percentile rank |  |  |  | 0.00%
PB PIU Grants 2021 |  |  |  |
Assumptions used to value stock awards |  |  |  |
Baseline Common Share Value (in dollars per share) |  |  | $ 26.08 |
Expected Volatility of Common Shares |  |  | 34.70% |
Risk-free Interest Rate |  |  | 0.18% |
PB PIU Grants 2021 | Target Level |  |  |  |
Assumptions used to value stock awards |  |  |  |
Grant date fair value (in dollars per share or unit) |  |  | $ 30.03 |
PB PIU Grants 2022 |  |  |  |
Assumptions used to value stock awards |  |  |  |
Baseline Common Share Value (in dollars per share) |  | $ 27.97 |  |
Expected Volatility of Common Shares |  | 31.70% |  |
Risk-free Interest Rate |  | 0.98% |  |
PB PIU Grants 2022 | Target Level |  |  |  |
Assumptions used to value stock awards |  |  |  |
Grant date fair value (in dollars per share or unit) |  | $ 32.87 |  |
PB PIU Grants 2023 |  |  |  |
Assumptions used to value stock awards |  |  |  |
Baseline Common Share Value (in dollars per share) | $ 25.94 |  |  |
Expected Volatility of Common Shares | 35.00% |  |  |
Risk-free Interest Rate | 4.28% |  |  |
PB PIU Grants 2023 | Target Level |  |  |  |
Assumptions used to value stock awards |  |  |  |
Grant date fair value (in dollars per share or unit) | $ 31.54 |  |  |

X
- References No definition available. + Details
Name: | ofc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEarnedPerformanceShareUnitsPayoutPercentageAbstract
Namespace Prefix: | ofc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the baseline common share value that is used in valuing the grant date fair value of awards. + References No definition available. + Details
Name: | ofc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsBaselineCommonShareValue
Namespace Prefix: | ofc_
Data Type: | dtr-types1:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the earned payout, as a percentage of units granted, if the entity's total shareholder return relative to a peer group of companies ranks at the 25th percentile. + References No definition available. + Details
Name: | ofc_SharebasedCompensationArrangementbySharebasedPaymentAwardofEarnedPayoutPercentageBasedonPercentileRankEqualsto25
Namespace Prefix: | ofc_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the earned payout, as a percentage of units granted, if the entity's total shareholder return relative to a peer group of companies ranks at the 50th percentile. + References No definition available. + Details
Name: | ofc_SharebasedCompensationArrangementbySharebasedPaymentAwardofEarnedPayoutPercentageBasedonPercentileRankEqualsto50
Namespace Prefix: | ofc_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the earned payout, as a percentage of units granted, if the entity's total shareholder return relative to a peer group of companies ranks at the 75th percentile or greater. + References No definition available. + Details
Name: | ofc_SharebasedCompensationArrangementbySharebasedPaymentAwardofEarnedPayoutPercentageBasedonPercentileRankGreaterthanorEqualsto75
Namespace Prefix: | ofc_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the earned payout percentage based on percentile rank below 25. + References No definition available. + Details
Name: | ofc_SharebasedCompensationArrangementbySharebasedPaymentAwardofEarnedPayoutPercentageBasedonPercentileRankLessthan25
Namespace Prefix: | ofc_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=ofc_PerformancebasedPIUsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=ofc_PBPIUGrants2021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ofc_AwardLevelAxis=ofc_TargetLevelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=ofc_PBPIUGrants2022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=ofc_PBPIUGrants2023Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |