XML 27 R61.htm IDEA: XBRL DOCUMENT v3.3.0.814

Regulatory Requirements - Narrative (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2015 USD ($)
Oppenheimer [Member]
Regulatory Capital Requirements [Line Items]
Required percentage of net capital to aggregate customer-related debit items		2.00%
Initial capital	$ 143,400,000	$ 143,400,000
Aggregate indebtedness		9.01%
Excess capital	111,600,000	$ 111,600,000
Freedom [Member]
Regulatory Capital Requirements [Line Items]
Initial capital	$ 5,800,000	5,800,000
Aggregate indebtedness	6.67%
Freedom maintain net capital equal to the greater	$ 250,000	250,000
Net capital in excess of minimum required	$ 5,600,000	$ 5,600,000
Oppenheimer Europe Ltd [Member] | Basel Three New Requirements [Member]
Regulatory Capital Requirements [Line Items]
Common equity Tier 1 capital ratio	9.56%	9.56%
Common equity Tier 1 required	4.50%	4.50%
Tier 1 capital ratio	9.55%	9.55%
Tier 1 capital ratio required	6.00%	6.00%
Total capital ratio	10.97%	10.97%
Total capital ratio required	8.00%	8.00%
Oppenheimer Investments Asia [Member]
Regulatory Capital Requirements [Line Items]
Initial capital	$ 3,000,000	$ 3,000,000
Net capital in excess of minimum required	2,600,000	2,600,000
Initial required capital	$ 387,000	$ 387,000

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

Common Equity Tier 1 Ratio calculated for capital adequacy purposes under the Capital Requirements Directive (DRD IV) in the European Union.

+ References

No definition available.

+ Details

Name:	opy_CommonEquityTierOneRatioUnderCrdFourth
Namespace Prefix:	opy_
Data Type:	num:percentItemType
Balance Type:	na
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

Required percentage of net capital to aggregate customer related debit items.

+ References

No definition available.

+ Details

Name:	opy_RequiredPercentageOfNetCapitalToAggregateCustomerRelatedDebitItems
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://www.xbrl.org/2003/role/presentationRef



-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

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://www.xbrl.org/2003/role/presentationRef



-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://www.xbrl.org/2003/role/presentationRef



-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://www.xbrl.org/2003/role/presentationRef



-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 is equal to the net worth of the broker dealer, less certain items such as exchange memberships, carrying value of securities not readily marketable, haircuts on marketable securities in proprietary accounts, furniture and equipment and other illiquid assets as defined.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Rule 15c3-1



-Number 240



-Section 15c3-1

+ Details

Name:	us-gaap_NetCapital
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_ProspectiveAdoptionOfNewAccountingPronouncementsAxis=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: