Related Party Transactions	6 Months Ended
Related Party Transactions	Jun. 30, 2011
Related Party Transactions [Abstract]
Related Party Transactions	Note 4-Related Party Transactions For the three months ended June 30, 2011 and 2010, the Company earned $0.7 million and $1.0 million, respectively, in investment advisory fees from unconsolidated VIEs which receive investment management services from the Company. For the six months ended June 30, 2011 and 2010, the Company earned $1.7 million and $2.1 million, respectively, in such fees. The Company is not the primary beneficiary of these VIEs. At both June 30, 2011 and December 31, 2010, the Company had less than $0.1 million remaining of an advance to an international investment company for organization and start-up costs, which is included in receivable from related parties on the consolidated statements of financial condition. The Company is the sponsor and investment manager of this entity. This entity is included in the previously mentioned unconsolidated VIEs, of which the Company is not considered the primary beneficiary. At June 30, 2011 and December 31, 2010, receivables from related parties included less than $0.1 million of loans to employees. The Company has, in the past, issued loans that were in the form of forgivable promissory notes, which were amortized through compensation expense pursuant to their terms. For the six months ended June 30, 2010, less than $0.1 million of such amortization was recognized through compensation and benefits expense. No such amortization was recognized for the three months ended June 30, 2010. The Company did not have any forgivable promissory notes at June 30, 2011 or December 31, 2010. On October 28, 2008, the operating company issued an aggregate of $16.0 million principal amount of Senior Subordinated Notes to entities established by Richard S. Pzena, the Company's Chief Executive Officer, for the benefit of certain of his family members, an entity controlled by a Company Director, and a former employee. The Notes were repaid in full during the year ended December 31, 2010.

The entire disclosure for related party transactions, including the nature of the relationship(s), a description of the transactions, the amount of the transactions, the effects of any change in the method of establishing the terms of the transaction from the previous period, stated interest rate, expiration date, terms and manner of settlement per the agreement with the related party, and amounts due to or from related parties. If the entity and one or more other entities are under common ownership or management control and this control affects the operating results or financial position, disclosure includes the nature of the control relationship even if there are no transactions between the entities. Disclosure may also include the aggregate amount of current and deferred tax expense for each statement of earnings presented where the entity is a member of a group that files a consolidated tax return, the amount of any tax related balances due to or from affiliates as of the date of each statement of financial position presented, the principal provisions of the method by which the consolidated amount of current and deferred tax expense is allocated to the members of the group and the nature and effect of any changes in that method. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(k))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 3A
-Section 04
-Paragraph b

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 57
-Paragraph 1-4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864

+ Details