Consolidation - Economic Interests of Consolidated Investment Product (Detail) - CLOs $ in Thousands	12 Months Ended
Dec. 31, 2017 USD ($)
Variable Interest Entity [Line Items]
Distributions received and unrealized gains on the subordinated notes held by the Company	$ 7
Investment management fees	4
Total Economic Interests	$ 11

Description of the amount of pre-tax income (loss) derived by the reporting entity from the Variable Interest Entity (VIE).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph d
-URI http://asc.fasb.org/extlink&oid=77990344&loc=d3e5747-111685

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of income between the reporting entity and the Variable Interest Entity (VIE).

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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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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- Definition

Variable Interest Entity, Measure of Activity, Distributions Received and Unrealized Gains (Losses) On Investment

+ References

No definition available.

+ Details

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Namespace Prefix:	vrts_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Details

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