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Share-Based Compensation and Other Compensation Matters (Details) (USD $)
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12 Months Ended |
0 Months Ended |
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Mar. 03, 2011
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Mar. 02, 2012
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Mar. 01, 2013
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Mar. 06, 2014
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May 31, 2010
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| Stock Options |
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| Share-Based Compensation |
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| Expiration period |
10 years
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| Restricted shares |
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| Shares |
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| Unvested at the beginning of the period (in shares) |
377,448us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
|
434,643us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
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648,378us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
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| Stock awards granted (in shares or units) |
216,607us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
|
193,833us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
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177,662us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
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| Forfeited (in shares) |
(21,335)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
|
(9,541)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
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(17,019)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
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| Vested (in shares) |
182,213us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
|
241,487us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
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374,378us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
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| Unvested at the end of the period (in shares) |
390,507us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
|
377,448us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
|
434,643us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
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| Restricted shares expected to vest (in shares) |
375,686ofc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestOutstandingNumber
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
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| Weighted Average Grant Date Fair Value |
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| Unvested at the beginning of the period (in dollars per share) |
26.96us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
|
$ 29.67us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
|
$ 33.13us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
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| Grant date fair value (in dollars per share) |
26.73us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
|
$ 25.91us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
|
$ 23.64us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
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| Forfeited (in dollars per share) |
25.10us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
|
$ 27.59us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
|
$ 31.43us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
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| Vested (in dollars per share) |
28.56us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
|
$ 30.97us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
|
$ 32.72us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
|
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| Unvested at the end of the period (in dollars per share) |
26.19us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
|
$ 26.96us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
|
$ 29.67us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
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| Restricted shares expected to vest (in dollars per share) |
26.18ofc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestOutstandingWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
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| Other Share-based Compensation Additional Disclosures |
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| Aggregate intrinsic value of restricted common shares, forfeiture restrictions lapsed |
4,900,000ofc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalIntrinsicValue
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
|
$ 6,300,000ofc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalIntrinsicValue
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
|
$ 9,000,000ofc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalIntrinsicValue
/ us-gaap_AwardTypeAxis
= ofc_RestrictedSharesMember
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| Performance share units |
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| Weighted Average Grant Date Fair Value |
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| Grant date fair value (in dollars per share) |
35.09us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
|
$ 26.84us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
|
$ 32.77us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
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| Potential earned PSUs payout for defined levels of performance under awards |
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| Earned PSUs payout (as a percent of PSUs granted) on 75th or greater percentile rank |
200.00%ofc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOfEarnedPerformanceShareUnitsPayoutPercentageBasedOnPercentileRankGreaterThanOrEqualsTo75
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
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| Earned PSUs payout (as a percent of PSUs granted) on 50th percentile rank |
100.00%ofc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOfEarnedPerformanceShareUnitsPayoutPercentageBasedOnPercentileRankEqualsTo50
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
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| Earned PSUs payout (as a percent of PSUs granted) on 25th percentile rank |
50.00%ofc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOfEarnedPerformanceShareUnitsPayoutPercentageBasedOnPercentileRankEqualsTo25
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
|
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| Performance share units granted on percentile rank below 25th (as a percent) |
0.00%ofc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOfEarnedPerformanceShareUnitsPayoutPercentageBasedOnPercentileRankLessThan25
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
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| Performance period of the award |
3 years
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| Assumptions used to value stock awards |
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| Baseline value per common share (in dollars per share) |
26.52ofc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsBaselineCommonShareValue
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
|
$ 25.85ofc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsBaselineCommonShareValue
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
|
$ 24.39ofc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsBaselineCommonShareValue
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
|
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| Expected volatility of common shares (as a percent) |
28.60%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
|
29.50%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
|
43.20%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
|
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| Risk-free interest rate (as a percent) |
0.66%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
|
0.33%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
|
0.41%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
|
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| Performance share units | 2011 PSU Grants |
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| Shares |
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| Stock awards granted (in shares or units) |
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56,883us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
/ us-gaap_PlanNameAxis
= ofc_A2011PsuGrantsMember
|
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| Unvested at the end of the period (in shares) |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
/ us-gaap_PlanNameAxis
= ofc_A2011PsuGrantsMember
|
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| Other Share-based Compensation Additional Disclosures |
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| Aggregate grant date fair value |
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|
2,796,000ofc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodAggregateFairValue
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
/ us-gaap_PlanNameAxis
= ofc_A2011PsuGrantsMember
|
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| Performance share units | 2012 PSU Grants |
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| Shares |
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| Stock awards granted (in shares or units) |
|
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|
54,070us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
/ us-gaap_PlanNameAxis
= ofc_A2012PSUGrantsMember
|
|
|
|
| Unvested at the end of the period (in shares) |
54,070us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
/ us-gaap_PlanNameAxis
= ofc_A2012PSUGrantsMember
|
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| Other Share-based Compensation Additional Disclosures |
|
|
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| Aggregate grant date fair value |
|
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|
1,772,000ofc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodAggregateFairValue
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
/ us-gaap_PlanNameAxis
= ofc_A2012PSUGrantsMember
|
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| Potential earned PSUs payout for defined levels of performance under awards |
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| Shares issued for PSU Awards Vested in Period (in shares) |
40,000ofc_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsSharesissuedforAwardsVestedinPeriod
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
/ us-gaap_PlanNameAxis
= ofc_A2012PSUGrantsMember
|
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| Performance share units | 2013 PSU Grants |
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| Shares |
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| Stock awards granted (in shares or units) |
|
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|
69,579us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
/ us-gaap_PlanNameAxis
= ofc_A2013PSUGrantsMember
|
|
|
| Unvested at the end of the period (in shares) |
69,579us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
/ us-gaap_PlanNameAxis
= ofc_A2013PSUGrantsMember
|
|
|
|
|
|
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| Other Share-based Compensation Additional Disclosures |
|
|
|
|
|
|
|
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| Aggregate grant date fair value |
|
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|
1,867,000ofc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodAggregateFairValue
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
/ us-gaap_PlanNameAxis
= ofc_A2013PSUGrantsMember
|
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| Performance share units | 2014 PSU Grants |
|
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| Shares |
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| Stock awards granted (in shares or units) |
|
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|
49,103us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
/ us-gaap_PlanNameAxis
= ofc_A2014PSUGrantsMember
|
|
| Unvested at the end of the period (in shares) |
49,103us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
/ us-gaap_PlanNameAxis
= ofc_A2014PSUGrantsMember
|
|
|
|
|
|
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| Other Share-based Compensation Additional Disclosures |
|
|
|
|
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|
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| Aggregate grant date fair value |
|
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|
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|
|
$ 1,723,000ofc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodAggregateFairValue
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
/ us-gaap_PlanNameAxis
= ofc_A2014PSUGrantsMember
|
|
| Potential earned PSUs payout for defined levels of performance under awards |
|
|
|
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| The number of percentile ranks to fall between to earn interpolated PSUs between such percentile ranks, conditioned on the percentile rank exceeding 25% |
2ofc_NumberOfPercentileRanksToFallBetweenToEarnInterpolatedPsu
/ us-gaap_AwardTypeAxis
= ofc_PerformanceShareUnitsMember
/ us-gaap_PlanNameAxis
= ofc_A2014PSUGrantsMember
|
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| Performance period of the award |
3 years
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| Maximum | Amended and Restated 2008 Omnibus Equity and Incentive Plan |
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| Share-Based Compensation |
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| Number of common shares of beneficial interest authorized to be issued |
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|
5,900,000.0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= ofc_AmendedAndRestated2008OmnibusEquityAndIncentivePlanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
|