XML 34 R81.htm IDEA: XBRL DOCUMENT v2.4.0.6

Employee Compensation Plans - Summarizes of Company's Non-Vested Options (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Non-vested beginning of year	76,914
Number of Options, Granted	1,590
Number of Options, Vested	(27,724)
Number of Options, Forfeited or expired
Number of Options, Non-vested end of year	50,780
Weighted average fair value, Non-vested beginning of year	$ 8.88
Weighted average fair value, Granted	$ 7.67
Weighted average fair value, Vested	$ 9.03
Weighted average fair value, Forfeited or expired
Weighted average fair value, Non-vested end of year	$ 9.49

X

- Definition

The number of equity-based payment instruments, options, that were forfeited or expired during the reporting period.

+ References

No definition available.

+ Details

Name:	opy_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOptionsForfeitedOrExpiredInPeriod
Namespace Prefix:	opy_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of grants made during the period on stock option plans.

+ References

No definition available.

+ Details

Name:	opy_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsGrantsInPeriod
Namespace Prefix:	opy_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on option plans.

+ References

No definition available.

+ Details

Name:	opy_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonVestedOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	opy_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Weighted average fair value as of the grant date of option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

No definition available.

+ Details

Name:	opy_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedOrExpiredWeightedAverageGrantDateFairValue
Namespace Prefix:	opy_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The number of non-vested options, that validly exist and are outstanding as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	opy_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumber
Namespace Prefix:	opy_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The weighted average fair value of nonvested awards on option plans.

+ References

No definition available.

+ Details

Name:	opy_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue
Namespace Prefix:	opy_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The number of equity-based payment instruments, options, that vested during the reporting period.

+ References

No definition available.

+ Details

Name:	opy_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriod
Namespace Prefix:	opy_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The weighted average fair value as of grant date pertaining to an option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ References

No definition available.

+ Details

Name:	opy_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	opy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration