XML 114 R69.htm IDEA: XBRL DOCUMENT v2.4.0.6

Contributed Capital (Detail)	12 Months Ended
	Dec. 31, 2012
Class of Warrant or Right [Line Items]
Warrants issued	2008
Warrants expire date	2013-04-13

X

- Definition

Warrant Issue Date

+ References

No definition available.

+ Details

Name:	opy_WarrantIssueDate
Namespace Prefix:	opy_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Expiration date of warrants issued.

+ References

No definition available.

+ Details

Name:	opy_WarrantsExpirationDate
Namespace Prefix:	opy_
Data Type:	us-types:dateStringItemType
Balance Type:	na
Period Type:	duration

X

- Details

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