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Regulatory Requirements - Regulatory Requirements Uniform Net Capital Rule (Detail) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Regulatory Capital Requirements [Abstract]
Net Capital	$ 397,875	$ 354,029
Minimum Net Capital Requirement	$ 56,082	$ 46,597
Ratio of Aggregate Indebtedness to Net Capital	2.11	1.97

X

- Definition

Amount of minimum net capital required to be maintained to engage in securities transactions.

+ References

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

-Publisher SEC

-Name Rule 15c3

-Number 240

-Section 1

-Paragraph 1

-Subparagraph i

-Article 15c3

-Subsection a

+ Details

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X

- Definition

Net capital is equal to the net worth of the broker dealer, less certain items such as exchange memberships, carrying value of securities not readily marketable, haircuts on marketable securities in proprietary accounts, furniture and equipment and other illiquid assets as defined.

+ References

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

-Publisher SEC

-Name Rule 15c3

-Number 240

-Section 1

-Paragraph 1

-Subparagraph ii

-Article 15c3

-Subsection a

+ Details

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X

- Definition

Indebtedness divided by net capital.

+ References

No definition available.

+ Details

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- Details

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