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Investment in Limited Partnerships - Additional Information (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Equity Method Investments And Joint Ventures [Abstract]
Consolidated VIE limited partnership interest	99.90%
Total assets recorded due to consolidation	$ 53,000	$ 53,000
Assets representing the carrying amount of remaining partnership		800,000
Residual interest upon dissolution of the partnership	1,000,000
Reduction of carrying amount of partnership	0
Remaining cash commitments	$ 0	$ 0

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- Definition

Carrying Amount Of Variable Interest As Debt Equity And Partnership Interest

+ References

No definition available.

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- Definition

Remaining cash commitments.

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X

- Definition

The carrying amount of assets an investment adviser manages on behalf of investors.

+ References

No definition available.

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- Definition

Cash inflow received as distributions, returns of capital, or sale proceeds from partnership interests held for investment purposes.

+ References

No definition available.

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- Definition

The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 22

-Article 12

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- Definition

The carrying amount of the consolidated Variable Interest Entity's assets included in the reporting entity's statement of financial position.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (bb)

-URI http://asc.fasb.org/extlink&oid=28200181&loc=d3e5710-111685

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