Consolidation - Economic Interests of Consolidated Investment Product (Details) - CLOs $ in Thousands	9 Months Ended
Sep. 30, 2021 USD ($)
Variable Interest Entity [Line Items]
Distributions received and unrealized gains (losses) on the subordinated notes	$ 8,720
Investment management fees	6,927
Total economic interests	$ 15,647

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph d
-URI http://asc.fasb.org/extlink&oid=123419778&loc=d3e5747-111685

+ Details

Name:	us-gaap_VariableInterestEntityActivityBetweenVIEAndEntityIncomeOrLossBeforeTax
Namespace Prefix:	us-gaap_
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

Name:	us-gaap_VariableInterestEntityActivityBetweenVIEAndEntityRevenues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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

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

- Definition

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

+ References

No definition available.

+ Details

Name:	vrts_VariableInterestEntityMeasureofActivityDistributionsReceivedandUnrealizedGainsLossesOnInvestment
Namespace Prefix:	vrts_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	srt_ConsolidatedEntitiesAxis=vrts_VariableInterestEntityPrimaryBeneficiaryCollateralizedLoanObligationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: