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Consolidation - Beneficial Interests of Consolidated Investment Product (Detail) - CLOs $ in Thousands	Dec. 31, 2017 USD ($)
Variable Interest Entity [Line Items]
Subordinated notes	$ 85,066
Accrued investment management fees	1,334
Total Beneficial Interests	$ 86,400

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Variable Interest Entity, Reporting Entity Involvement, Beneficial Interests, Amount

+ References

No definition available.

+ Details

Name:	vrts_VariableInterestEntityReportingEntityInvolvementBeneficialInterestsAmount
Namespace Prefix:	vrts_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- Definition

Variable Interest Entity, Reporting Entity Involvement, Beneficial Interests, Deferred Revenue, Amount

+ References

No definition available.

+ Details

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Namespace Prefix:	vrts_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- Definition

Variable Interest Entity, Reporting Entity Involvement, Beneficial Interests, Subordinated Debt, Amount

+ References

No definition available.

+ Details

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Namespace Prefix:	vrts_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: