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v2.4.1.9

Subsequent Events - Additional Information (Detail) (Subsequent Event [Member], USD $) In Millions, unless otherwise specified | 0 Months Ended
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May 11, 2015 MutualFund | Apr. 10, 2015
Subsequent Event [Line Items] |  |
Number of open-end mutual funds | 5 vrts_NumberOfOpenEndMutualFunds |
ETF Issuer Solutions [Member] |  |
Subsequent Event [Line Items] |  |
Investment to acquire majority interest |  | $ 4.8 us-gaap_PaymentsToAcquireLimitedPartnershipInterests / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = vrts_EtfIssuerSolutionsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember

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- Definition Cash outflow related to the acquisition or continued holding of limited partnership interests held for investment purposes. + References No definition available. + Details
Name: | us-gaap_PaymentsToAcquireLimitedPartnershipInterests
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Number Of Open End Mutual Funds + References No definition available. + Details
Name: | vrts_NumberOfOpenEndMutualFunds
Namespace Prefix: | vrts_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration