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Fair Value Disclosures - Schedule of Fair Value Measurements of Investments in Certain Entities that Calculate Net Asset Value Per Share (Parenthetical) (Detail) (Star Asia Special Situations Fund [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Star Asia Special Situations Fund [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Initial life of closed-end fund investment	3 years
Unfunded Commitments	$ 321
Unfunded commitment expiration date	December 31, 2014

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- Definition

Commitment Expiration Date

+ References

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- Definition

Initial life of closed end fund investment.

+ References

No definition available.

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X

- Definition

The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 6A

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=SL6742756-110258

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