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Capital and Reserve Requirement Information - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Compliance With Regulatory Capital Requirements Under Brokers And Dealers [Line Items]
Aggregate indebtedness to net capital	15.0
Minimum net capital requirement based on aggregate indebtedness	$ 1.6	$ 1.2

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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Balance Type:	credit
Period Type:	instant

X

- Definition

Ratio Of Indebtedness To Net Capital One

+ References

No definition available.

+ Details

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Namespace Prefix:	vrts_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Details

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