XML 127 R88.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Regulatory Requirements - Additional Information (Narrative) (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) | Dec. 31, 2018 EUR (€)
Oppenheimer |  |
Regulatory Capital Requirements [Line Items] |  |
Required percentage of net capital to aggregate customer-related debit items | $ 0.02 |
Net Capital as Reported in Entity's Part II Unaudited FOCUS Report | 194,500,000 |
Excess capital | $ 175,800,000 |
Aggregate indebtedness | 20.86% |
Freedom |  |
Regulatory Capital Requirements [Line Items] |  |
Net Capital as Reported in Entity's Part II Unaudited FOCUS Report | $ 5,300,000 |
Freedom maintain net capital equal to the greater | $ 100,000 |
Aggregate indebtedness | 6.67% |
Net capital in excess of minimum required | $ 5,200,000 |
Oppenheimer Europe Ltd |  |
Regulatory Capital Requirements [Line Items] |  |
Regulatory capital required to be maintained | € |  | € 730,000
Oppenheimer Investments Asia Ltd. |  |
Regulatory Capital Requirements [Line Items] |  |
Net capital | 1,500,000 |
Excess Liquid Capital under Hong Kong SFC Rules | 1,100,000 |
Regulatory capital required to be maintained | $ 383,000 |
Basel Three New Requirements [Member] | Oppenheimer Europe Ltd |  |
Regulatory Capital Requirements [Line Items] |  |
Common Equity Tier 1 Ratio | 13.37% | 13.37%
Common Equity Tier 1 Ratio Required | 4.50% | 4.50%
Tier 1 Capital Ratio | 13.37% | 13.37%
Tier 1 Capital Ratio Required | 6.00% | 6.00%
Total Capital Ratio | 13.65% | 13.65%
Total Capital Ratio Required | 8.00% | 8.00%

X
- Definition Common Equity Tier One Ratio required for capital adequacy purposes under the Capital Requirements Directive (DRD IV) in the European Union. + References No definition available. + Details
Name: | opy_CommonEquityTierOneRatioRequiredUnderCrdFourth
Namespace Prefix: | opy_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Excess Liquid Capital under Hong Kong SFC Rules + References No definition available. + Details
Name: | opy_ExcessLiquidCapitalunderHongKongSFCRules
Namespace Prefix: | opy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Liquid Capital under Hong Kong SFC Rules + References No definition available. + Details
Name: | opy_LiquidCapitalunderHongKongSFCRules
Namespace Prefix: | opy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Percentage of net capital to aggregate indebtedness. + References No definition available. + Details
Name: | opy_PercentageOfNetCapitalToAggregateIndebtedness
Namespace Prefix: | opy_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tier One Capital Ratio calculated for capital adequacy purposes under the Capital Requirements Directive (DRD IV) in the European Union. + References No definition available. + Details
Name: | opy_TierOneCapitalRatioCalculatedUnderCrdFourth
Namespace Prefix: | opy_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Tier One Capital Ratio required for capital adequacy purposes under the Capital Requirements Directive (DRD IV) in the European Union. + References No definition available. + Details
Name: | opy_TierOneCapitalRatioRequiredUnderCrdFourth
Namespace Prefix: | opy_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total Capital Ratio calculated for capital adequacy purposes under the Capital Requirements Directive (DRD IV) in the European Union. + References No definition available. + Details
Name: | opy_TotalCapitalRatioCalculatedUnderCrdFourth
Namespace Prefix: | opy_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total Capital Ratio Required for capital adequacy purposes under the Capital Requirements Directive (DRD IV) in the European Union. + References No definition available. + Details
Name: | opy_TotalCapitalRatioRequiredUnderCrdFourth
Namespace Prefix: | opy_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of net capital in excess of the alternative minimum required net capital. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
Name: | us-gaap_AlternativeExcessNetCapital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Percentage of Common Equity Tier One Risk-based Capital to total risk-weighted assets, as defined by regulatory framework. + References No definition available. + Details
Name: | us-gaap_CommonEquityTierOneCapitalRatio
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of net capital in excess of the minimum required net capital. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
Name: | us-gaap_ExcessNetCapitalAt1500Percent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of minimum net capital required to be maintained to engage in securities transactions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
Name: | us-gaap_MinimumNetCapitalRequired1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Minimum amount of net capital required to be maintained by entity's broker-dealer subsidiary to engage in securities transactions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
Name: | us-gaap_MinimumNetCapitalRequiredForBrokerDealerSubsidiary1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Net capital as reported in Company's Part II of Form X-17A-5. + References No definition available. + Details
Name: | us-gaap_NetCapitalAsReportedInEntitysPartIIUnauditedFOCUSReport
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition This element represents the amount of net capital of a broker or dealer that has elected not to be subject to the Aggregate Indebtedness Standard (as defined). The amount of net capital represented by this element is the greater of $250,000 or two percent of aggregate debit items computed in accordance with the Formula for Determination of Reserve Requirements for Brokers and Dealers (as defined). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
Name: | us-gaap_TwoPercentOfDebitItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=opy_OppenheimerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=opy_FreedomMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=opy_OppenheimerEuropeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=opy_OppenheimerInvestmentsAsiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProspectiveAdoptionOfNewAccountingPronouncementsAxis=opy_BaselThreeNewRequirementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |