Consolidated Sponsored Investment Products - Balances of Consolidated Sponsored Investment Products (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Total cash	$ 13,547	$ 531
Total investments	241,107	139,054
All other assets	8,756	9,595
Total liabilities	(23,838)	(8,435)
Redeemable noncontrolling interests	(22,265)	(42,186)
Company's net interests in consolidated sponsored investment products	$ 217,307	$ 98,559

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Carrying amount, attributable to parent and noncontrolling interests, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.27(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Cash And Cash Equivalents And Restricted Cash Of Consolidated Sponsored Investment Products

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No definition available.

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- Definition

Current investment securities of consolidated sponsored investment products, which includes financial instruments that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time, usually less than one year or the normal operating cycle, whichever is longer).

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No definition available.

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- Definition

Net Interest In Consolidated Sponsored Investment Products

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No definition available.

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- Definition

Aggregate carrying amount, as of the balance sheet date, of other current assets of consolidated sponsored investment products not separately presented elsewhere in the balance sheet.

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No definition available.

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- Definition

Related to consolidated sponsored investment products, the aggregate carrying amount, as of the balance sheet date, of current obligations not separately disclosed in the balance sheet due to materiality considerations. Current liabilities are expected to be paid within one year (or the normal operating cycle, if longer).

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No definition available.

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