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Employee Compensation Plans - Additional Information (Narrative) (Details) (USD $) | 12 Months Ended | 0 Months Ended
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Dec. 31, 2014 employee_compensation_plan | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Jan. 29, 2015 | Jan. 09, 2015 | Jan. 28, 2019 | Feb. 26, 2015 | Jan. 28, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Employee Compensation Plans Granted | 2 opy_NumberofEmployeeCompensationPlansGranted |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term granted for options | 5 years | [1] | 5 years | [1] | 5 years | [1] | 5 years | [1] | 4 years 6 months | [1] |  |  |  |  |
Maximum annual contribution under Defined Contribution Plan | $ 17,500 us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount |  | $ 17,500 us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount |  | $ 17,000 us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount |  |  |  |  |  |  |  |  |  |
Employer contribution to Defined Contribution Plan | 1,200,000 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount |  | 1,300,000 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount |  | 1,100,000 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount |  |  |  |  |  |  |  |  |  |
Deferred bonus amounts | 8,600,000 opy_DeferredCompensationArrangementAmountOfBonusAwarded |  | 8,500,000 opy_DeferredCompensationArrangementAmountOfBonusAwarded |  | 8,100,000 opy_DeferredCompensationArrangementAmountOfBonusAwarded |  |  |  |  |  |  |  |  |  |
Vesting period of deferred bonus | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company-owned life insurance policy designed to offset a percentage of the EDCP liability | 60.00%opy_CompanyOwnedLifeInsurance |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred compensation plans cost | 11,400,000 us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense |  | 17,800,000 us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense |  | 12,100,000 us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense |  |  |  |  |  |  |  |  |  |
Number of Options, Granted | 2,976 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross |  | 951 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross |  |  |  |  |  |  |  |  |  |  |  |
Restricted Stock | Class A Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate intrinsic value of ESP awards outstanding | 28,800,000 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
The aggregate intrinsic value of ESP awards that are expected to vest | 27,900,000 opy_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestAggregateIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation expense relating to the share-based awards | 5,600,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  | 5,000,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  | 3,400,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |  |  |  |  |  |  |  |  |
Unrecognized compensation cost related to unvested share-based compensation | 9,600,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost is expected to be recognized over a weighted average period | 1 year 8 months 12 days |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares of Class A Stock available | 998,615 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee Stock Option |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation expense relating to the share-based awards | 133,600 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  | 158,200 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  | 164,200 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |  |  |  |  |  |  |  |
Cost is expected to be recognized over a weighted average period | 1 year 2 months 23 days |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate intrinsic value of options outstanding | 12,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate intrinsic value of vested options | 1,600 opy_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedOutstandingAggregateIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate intrinsic value of options that are expected to vest | 11,400 opy_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpectedToVestOutstandingAggregateIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation cost related to unvested share-based compensation | 74,300 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee Stock Option | Subsequent Events |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period under share based payment |  |  |  |  |  |  |  |  |  |  | 4 years 6 months |  |  |  |
Number of Options, Granted |  |  |  |  |  |  |  |  |  |  | 4,177 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |
Stock Appreciation Rights |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation expense relating to the share-based awards | 380,100 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = opy_StockAppreciationRightsMember |  | 4,100,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = opy_StockAppreciationRightsMember |  | 590,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = opy_StockAppreciationRightsMember |  |  |  |  |  |  |  |  |  |
Cost is expected to be recognized over a weighted average period | 2 years 4 months 24 days |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate intrinsic value of OARs outstanding and expected to vest | 4,500,000 opy_StockAppreciationRightsOutstandingAndExpectedToVestAggregateIntrinsicValue / us-gaap_AwardTypeAxis = opy_StockAppreciationRightsMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liability related to the OARs | 3,400,000 opy_LiabilityRelatedToOppenheimerStockAppreciationRights / us-gaap_AwardTypeAxis = opy_StockAppreciationRightsMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total unrecognized compensation cost | 5,300,000 opy_EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostNotYetRecognizedStockAppreciationRights / us-gaap_AwardTypeAxis = opy_StockAppreciationRightsMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Appreciation Rights | Subsequent Events |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period under share based payment |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |
Number of OARs |  |  |  |  |  |  |  |  |  |  |  | 567,600 opy_NumberOfStockAppreciationRightsGranted / us-gaap_AwardTypeAxis = opy_StockAppreciationRightsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |
Employee Share Plan | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period under share based payment | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee Share Plan | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period under share based payment | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Oppenheimer Holdings Inc. Stock Appreciation Right Plan | Stock Appreciation Rights |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period under share based payment | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term granted for options | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period | 6 months |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Incentive Plan | Vesting Period Five Years | Class A Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term granted for options | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Incentive Plan | Second Anniversary |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage under share based payment | 25.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage / us-gaap_PlanNameAxis = opy_EquityIncentivePlanMember / us-gaap_VestingAxis = opy_SecondAnniversaryMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Incentive Plan | Third Anniversary |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage under share based payment | 25.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage / us-gaap_PlanNameAxis = opy_EquityIncentivePlanMember / us-gaap_VestingAxis = opy_ThirdAnniversaryMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Incentive Plan | Fourth Anniversary |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage under share based payment | 25.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage / us-gaap_PlanNameAxis = opy_EquityIncentivePlanMember / us-gaap_VestingAxis = opy_FourthAnniversaryMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Incentive Plan | Six Months Before Expiration |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage under share based payment | 25.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage / us-gaap_PlanNameAxis = opy_EquityIncentivePlanMember / us-gaap_VestingAxis = opy_ExpirationDateOneMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Incentive Plan 2014 | Subsequent Events | Class A Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares awarded |  |  |  |  |  |  |  |  |  |  | 133,681 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_PlanNameAxis = opy_StockIncentivePlanTwoThousandFourteenMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  | 138,900 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_PlanNameAxis = opy_StockIncentivePlanTwoThousandFourteenMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Shares vesting period |  |  |  |  |  |  |  |  |  |  |  |  | Jan. 28, 2018 |  |
Stock Incentive Plan 2014 | Subsequent Events | Class A Stock | Non Employee Director |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares awarded |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14,000 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_PlanNameAxis = opy_StockIncentivePlanTwoThousandFourteenMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_TitleOfIndividualAxis = opy_NonEmployeeDirectorMember
Next three years vesting percentage of shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25.00%opy_PercentageOfRestrictedStockVestingInNextThreeYearsFromDateOfGrant / us-gaap_PlanNameAxis = opy_StockIncentivePlanTwoThousandFourteenMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_TitleOfIndividualAxis = opy_NonEmployeeDirectorMember
Stock Incentive Plan 2014 | Restricted Stock | Subsequent Events | Class A Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period under share based payment |  |  |  |  |  |  |  |  |  |  | 3 years |  |  | 5 years |
Number of shares awarded |  |  |  |  |  |  |  |  |  |  | 31,690 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = opy_StockIncentivePlanTwoThousandFourteenMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  | 13,795 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = opy_StockIncentivePlanTwoThousandFourteenMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Stock Incentive Plan 2014 | Vesting Period Three Years | Subsequent Events | Class A Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period under share based payment |  |  |  |  |  |  |  |  |  |  | 3 years |  |  | 3 years |
Number of shares awarded |  |  |  |  |  |  |  |  |  |  | 59,876 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_AwardTypeAxis = opy_VestingPeriodThreeYearsMember / us-gaap_PlanNameAxis = opy_StockIncentivePlanTwoThousandFourteenMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |
Stock Incentive Plan 2014 | Vesting Period Five Years | Subsequent Events | Class A Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period under share based payment |  |  |  |  |  |  |  |  |  |  | 5 years |  |  | 5 years |
Number of shares awarded |  |  |  |  |  |  |  |  |  |  | 73,805 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_AwardTypeAxis = opy_VestingPeriodFiveYearsMember / us-gaap_PlanNameAxis = opy_StockIncentivePlanTwoThousandFourteenMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |
Executive Deferred Compensation Plan and Deferred Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company's deferred compensation liability | 49,600,000 us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent / us-gaap_PlanNameAxis = opy_ExecutiveDeferredCompensationPlanAndDeferredIncentivePlanMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
CIBC Deferred Compensation Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company's deferred compensation liability | $ 16,000,000 us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent / us-gaap_PlanNameAxis = opy_DeferredCompensationPlanMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | The expected term was determined based on actual awards.

X
- Definition Company-owned life insurance policy designed to offset a percentage of the EDCP liability. + References No definition available. + Details
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Namespace Prefix: | opy_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Deferred compensation arrangement amount of bonus awarded. + References No definition available. + Details
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Namespace Prefix: | opy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Deferred compensation vesting life. + References No definition available. + Details
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Namespace Prefix: | opy_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Aggregate unrecognized cost of option awards made to employees under a stock appreciation rights plan or plans, that have yet to vest. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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Period Type: | instant

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- Definition Liability related to the OARs. + References No definition available. + Details
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Namespace Prefix: | opy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Number of type of employee compensation plans granted under share-based compensation and cash-based compensation plans + References No definition available. + Details
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Namespace Prefix: | opy_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Number of stock appreciation rights granted. + References No definition available. + Details
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Namespace Prefix: | opy_
Data Type: | xbrli:sharesItemType
Balance Type: | na
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- Definition Percentage of restricted stock vesting in next three years from date of grant. + References No definition available. + Details
Name: | opy_PercentageOfRestrictedStockVestingInNextThreeYearsFromDateOfGrant
Namespace Prefix: | opy_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Share based compensation arrangement by share based payment award equity instruments other than options expected to vest aggregate intrinsic value. + References No definition available. + Details
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Namespace Prefix: | opy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise prices of expected to vested options outstanding. + References No definition available. + Details
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Namespace Prefix: | opy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise prices of fully vested options outstanding. + References No definition available. + Details
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Namespace Prefix: | opy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Share based compensation arrangement by share based payment restricted stock award vesting date. + References No definition available. + Details
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Namespace Prefix: | opy_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of difference between fair value and exercise price of outstanding and expected to vest stock appreciation rights. + References No definition available. + Details
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Namespace Prefix: | opy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition The compensation expense recognized during the period pertaining to the deferred compensation arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 30 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation. + References No definition available. + Details
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- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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