XML 78 R68.htm IDEA: XBRL DOCUMENT
v3.26.1

Regulatory requirements (Details) | 3 Months Ended
--- | ---
Mar. 31, 2026 USD ($)
Regulatory Capital Requirements [Line Items] |
Regulatory capital required to be maintained | $ 4,150,000
Oppenheimer |
Regulatory Capital Requirements [Line Items] |
Required percentage of net capital to aggregate customer-related debit items (as a percent) | 2.00%
Net capital | $ 437,200,000
Aggregate indebtedness (as a percent) | 26.28%
Excess capital | $ 403,900,000
Oppenheimer Europe Ltd | Basel Three New Requirements |
Regulatory Capital Requirements [Line Items] |
Common Equity Tier 1 ratio (as a percent) | 157.00%
Common equity tier 1 ratio required (as a percent) | 56.00%
Tier 1 capital ratio (as a percent) | 157.00%
Tier 1 capital ratio required (as a percent) | 75.00%
Total capital ratio (as a percent) | 209.00%
Total capital ratio required (as a percent) | 100.00%
Oppenheimer Investments Asia Ltd. |
Regulatory Capital Requirements [Line Items] |
Net capital | $ 3,500,000
Excess liquid capital under hong kong SFC rules | 3,100,000
Regulatory capital required to be maintained | $ 382,612

X
- Definition Banking Regulation, Common Equity Tier One Ratio + References No definition available. + Details
Name: | opy_BankingRegulationCommonEquityTierOneRatio
Namespace Prefix: | opy_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Broker-Deal, Minimum Net Capital Requirement, Parent + References No definition available. + Details
Name: | opy_BrokerDealMinimumNetCapitalRequirementParent
Namespace Prefix: | opy_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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: | dtr-types: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: | dtr-types: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: | dtr-types: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: | dtr-types: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: | dtr-types: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: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of net capital in excess of minimum required net capital, calculated under Alternative Standard. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Rule 15c3-1 -Number 240 -Section 15c3-1 -Publisher SEC + Details
Name: | srt_AlternativeExcessNetCapital
Namespace Prefix: | srt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Minimum amount of net capital required to be maintained by broker-dealer and its subsidiary, calculated under Aggregate Indebtedness Standard. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Rule 15c3-1 -Number 240 -Section 15c3-1 -Publisher SEC + Details
Name: | srt_MinimumNetCapitalRequired1
Namespace Prefix: | srt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of net capital of broker-dealer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Rule 15c3-1 -Number 240 -Section 15c3-1 -Publisher SEC + Details
Name: | srt_NetCapital
Namespace Prefix: | srt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147477270/942-505-50-1B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477270/942-505-50-1 + Details
Name: | us-gaap_ComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=opy_OppenheimerMember
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: | opy_RegulatoryCapitalRequirementAxis=opy_BaselThreeNewRequirementsMember
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: |