The tables below illustrate the fees and expenses that you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Virtus Mutual Funds. More information about these and other discounts is available from your financial advisor and under “Sales Charges” on page 79 of the fund’s prospectus and “Alternative Purchase Arrangements” on page 95 of the fund’s statement of additional information (“SAI”).

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund’s portfolio turnover rate was 23% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

23.00%

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

A contingent deferred sales charge may be imposed on certain redemptions (i) within 18 months on exchanges from a Virtus non-money market fund into a Virtus money market fund; and (ii) on purchases on which a finder’s fee has been paid. The deferred sales charge is imposed on Class C Shares redeemed during the first year only.

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Virtus Mutual Funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

The Total Annual Fund Operating Expenses do not correlate to the ratio of expenses to average net assets appearing in the Financial Highlights tables, which tables reflect only the operating expenses of the fund and do not include acquired fund fees and expenses or the effect of any restatement of expenses due to post-fiscal year end contract changes.

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes an investment of $10,000 in the fund for the time periods indicated. It shows your costs if you sold your shares at the end of the period or continued to hold them. The example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Investments, Risks and Performance

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The fund pursues long-term capital appreciation in the small market capitalization sector while seeking to incur less risk than the small-cap market. The fund invests in a select group of small market capitalization growth companies believed to be undervalued relative to their future growth potential. The investment strategy emphasizes companies assessed by the subadviser as having a sustainable competitive advantage and able to grow over an extended period of time. Although the fund invests primarily in U.S. companies, it may invest in foreign securities and American Depositary Receipts.

Under normal circumstances, the fund invests at least 80% of its assets in common stocks of small market capitalization companies. As of the date of this Prospectus, the fund’s subadviser considers small market capitalization companies for this purpose to be those companies that, at the time of initial purchase, have market capitalizations within the range of companies included in the Russell 2000® Growth Index. Because small market capitalization companies are defined by reference to an index, the market capitalization of companies in which the fund invests may vary with market conditions. As of its reconstitution effective June 27, 2014, the market capitalization range of companies included in the Russell 2000® Growth Index was $143 million to $4.5 billion. Generally, the fund invests in approximately 20 to 35 securities at any given time.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

The fund may not achieve its objective(s), and it is not intended to be a complete investment program. The value of the fund’s investments that supports your share value may decrease. If between the time you purchase shares and the time you sell shares the value of the fund’s investments decreases, you will lose money. Investment values can decrease for a number of reasons. Conditions affecting the overall economy, specific industries or companies in which the fund invests can be worse than expected, and investments may fail to perform as the subadviser expects. As a result, the value of your shares may decrease. Purchase and redemption activities by fund shareholders may impact the management of the fund and its ability to achieve its investment objective(s). The redemption by one or more large shareholders or groups of shareholders of their holdings in the fund could have an adverse impact on the remaining shareholders in the fund, including by accelerating the realization of capital gains and increasing the fund's transaction costs. The principal risks of investing in the fund are:

Depositary Receipts Risk. The risk that investments in foreign companies through depositary receipts will expose the fund to the same risks as direct investment in securities of foreign issuers.

Equity Securities Risk. The risk that events negatively affecting issuers, industries or financial markets in which the fund invests will impact the value of the stocks held by the fund and thus, the value of the fund’s shares over short or extended periods. Investments in a particular style or in small or medium-sized companies may enhance that risk.

Foreign Investing Risk. The risk that the prices of foreign securities in the fund’s portfolio will be more volatile than those of domestic securities, or will be negatively affected by currency fluctuations or economic, political or other developments.

Growth Stocks Risk. The risk that the fund’s investments in growth stocks will be more volatile than investments in other types of stocks, or will perform differently from the market as a whole and from other types of stocks.

Limited Number of Investments Risk. The risk that the fund’s portfolio will be more susceptible to factors adversely affecting issuers of securities in the fund’s portfolio than would a fund holding a greater number of securities.

Market Volatility Risk. The risk that the value of the securities in which the fund invests may go up or down in response to the prospects of individual companies and/or general economic conditions. Price changes may be temporary or may last for extended periods.

Small Market Capitalization Companies Risk. The risk that the fund’s investments in small market capitalization companies will increase the volatility and risk of loss to the fund, as compared with investments in larger, more established companies.

Risk Lose Money [Text]

rr_RiskLoseMoney

If between the time you purchase shares and the time you sell shares the value of the fund’s investments decreases, you will lose money.

Bar Chart and Performance Table [Heading]

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Performance Information

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The bar chart and table below provide some indication of the potential risks of investing in the fund. The fund’s past performance, before and after taxes, is not necessarily an indication of how the fund will perform in the future.

The bar chart shows changes in the fund's performance from year to year over the life of the fund. The table shows how the fund's average annual returns compare to those of a broad-based securities market index. Updated performance information is available at virtus.com or by calling 800-243-1574.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

800-243-1574

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

virtus.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund’s past performance, before and after taxes, is not necessarily an indication of how the fund will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

Calendar year total returns for Class A Shares (includes returns of a predecessor fund)

Bar Chart Narrative [Text Block]

rr_BarChartNarrativeTextBlock

Returns do not reflect sales charges and would be lower if they did.

Annual Return (%)

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

Returns do not reflect sales charges and would be lower if they did.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter:

Q2/2009:

22.90%

Worst Quarter:

Q4/2008:

-28.17%

Year to date (6/30/2014):

-2.92%

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended 12/31/13; includes returns of a predecessor fund)

Performance Table Does Reflect Sales Loads

rr_PerformanceTableDoesReflectSalesLoads

Returns reflect deduction of maximum sales charges and full redemption at end of periods shown.

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

Actual after-tax returns depend on the investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold fund shares in tax-deferred accounts or to shares held by non-taxable entities.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns are shown only for Class A Shares; after-tax returns for other classes will vary.

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

In certain cases, the Return After Taxes on Distributions and Sale of Fund Shares for a period may be higher than other return figures for the same period. This will occur when a capital loss is realized upon the sale of fund shares and provides an assumed tax benefit that increases the return.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

Returns reflect deduction of maximum sales charges and full redemption at end of periods shown.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

The Russell 2000® Growth Index is a market capitalization-weighted index of growth-oriented stocks of the smallest 2,000 companies in the Russell Universe, which comprises the 3,000 largest U.S. companies. The index is calculated on a total-return basis with dividends reinvested. The index is unmanaged and not available for direct investment.

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. After-tax returns are shown only for Class A Shares; after-tax returns for other classes will vary. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold fund shares in tax-deferred accounts or to shares held by non-taxable entities. In certain cases, the Return After Taxes on Distributions and Sale of Fund Shares for a period may be higher than other return figures for the same period. This will occur when a capital loss is realized upon the sale of fund shares and provides an assumed tax benefit that increases the return.

VIRTUS SMALL-CAP SUSTAINABLE GROWTH FUND | Class A

Risk/Return:

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

PSGAX

Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Maximum Deferred Sales Charge (load) (as a percentage of the lesser of purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

1.00%

^[1]

Management Fees

rr_ManagementFeesOverAssets

0.90%

Distribution and Shareholder Servicing (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.41%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.57%

^[2]

1 Year

rr_ExpenseExampleYear01

726

3 Years

rr_ExpenseExampleYear03

1,042

5 Years

rr_ExpenseExampleYear05

1,381

10 Years

rr_ExpenseExampleYear10

2,335

1 Year

rr_ExpenseExampleNoRedemptionYear01

726

3 Years

rr_ExpenseExampleNoRedemptionYear03

1,042

5 Years

rr_ExpenseExampleNoRedemptionYear05

1,381

10 Years

rr_ExpenseExampleNoRedemptionYear10

2,335

2007

rr_AnnualReturn2007

(2.97%)

2008

rr_AnnualReturn2008

(34.98%)

2009

rr_AnnualReturn2009

38.30%

2010

rr_AnnualReturn2010

10.33%

2011

rr_AnnualReturn2011

18.76%

2012

rr_AnnualReturn2012

12.21%

2013

rr_AnnualReturn2013

37.23%

Year to Date Return, Label

rr_YearToDateReturnLabel

Year to date

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Jun. 30, 2014

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

(2.92%)

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

22.90%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(28.17%)

Label

rr_AverageAnnualReturnLabel

Return Before Taxes

1 Year

rr_AverageAnnualReturnYear01

29.34%

5 Years

rr_AverageAnnualReturnYear05

21.33%

Since Inception

rr_AverageAnnualReturnSinceInception

7.57%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 28, 2006

VIRTUS SMALL-CAP SUSTAINABLE GROWTH FUND | Class C

Risk/Return:

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

PSGCX

Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (load) (as a percentage of the lesser of purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

1.00%

^[3]

Management Fees

rr_ManagementFeesOverAssets

0.90%

Distribution and Shareholder Servicing (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses

rr_OtherExpensesOverAssets

0.41%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

2.32%

^[2]

1 Year

rr_ExpenseExampleYear01

335

3 Years

rr_ExpenseExampleYear03

724

5 Years

rr_ExpenseExampleYear05

1,240

10 Years

rr_ExpenseExampleYear10

2,656

1 Year

rr_ExpenseExampleNoRedemptionYear01

235

3 Years

rr_ExpenseExampleNoRedemptionYear03

724

5 Years

rr_ExpenseExampleNoRedemptionYear05

1,240

10 Years

rr_ExpenseExampleNoRedemptionYear10

2,656

Label

rr_AverageAnnualReturnLabel

Return Before Taxes

1 Year

rr_AverageAnnualReturnYear01

36.14%

5 Years

rr_AverageAnnualReturnYear05

21.82%

Since Inception

rr_AverageAnnualReturnSinceInception

7.59%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 28, 2006

VIRTUS SMALL-CAP SUSTAINABLE GROWTH FUND | Class I

Risk/Return:

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

PXSGX

Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (load) (as a percentage of the lesser of purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.90%

Distribution and Shareholder Servicing (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.41%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.32%

^[2]

1 Year

rr_ExpenseExampleYear01

134

3 Years

rr_ExpenseExampleYear03

418

5 Years

rr_ExpenseExampleYear05

723

10 Years

rr_ExpenseExampleYear10

1,590

1 Year

rr_ExpenseExampleNoRedemptionYear01

134

3 Years

rr_ExpenseExampleNoRedemptionYear03

418

5 Years

rr_ExpenseExampleNoRedemptionYear05

723

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,590

Label

rr_AverageAnnualReturnLabel

Return Before Taxes

1 Year

rr_AverageAnnualReturnYear01

37.49%

5 Years

rr_AverageAnnualReturnYear05

22.86%

Since Inception

rr_AverageAnnualReturnSinceInception

8.55%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 28, 2006

VIRTUS SMALL-CAP SUSTAINABLE GROWTH FUND | Return After Taxes on Distributions | Class A

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions

1 Year

rr_AverageAnnualReturnYear01

28.44%

5 Years

rr_AverageAnnualReturnYear05

21.15%

Since Inception

rr_AverageAnnualReturnSinceInception

7.46%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 28, 2006

VIRTUS SMALL-CAP SUSTAINABLE GROWTH FUND | Return After Taxes on Distributions and Sale of Fund Shares | Class A

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions and Sale of Fund Shares

1 Year

rr_AverageAnnualReturnYear01

17.23%

5 Years

rr_AverageAnnualReturnYear05

17.50%

Since Inception

rr_AverageAnnualReturnSinceInception

6.05%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 28, 2006

VIRTUS SMALL-CAP SUSTAINABLE GROWTH FUND | Russell 2000® Growth Index

Risk/Return:

rr_RiskReturnAbstract

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses or taxes)

Label

rr_AverageAnnualReturnLabel

Russell 2000® Growth Index (reflects no deduction for fees, expenses or taxes)

1 Year

rr_AverageAnnualReturnYear01

43.30%

5 Years

rr_AverageAnnualReturnYear05

22.58%

Since Inception

rr_AverageAnnualReturnSinceInception

10.06%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 28, 2006

[1]	A contingent deferred sales charge may be imposed on certain redemptions (i) within 18 months on exchanges from a Virtus non-money market fund into a Virtus money market fund; and (ii) on purchases on which a finder's fee has been paid.
[2]	The Total Annual Fund Operating Expenses do not correlate to the ratio of expenses to average net assets appearing in the Financial Highlights tables, which tables reflect only the operating expenses of the fund and do not include acquired fund fees and expenses or the effect of any restatement of expenses due to post-fiscal year end contract changes.
[3]	The deferred sales charge is imposed on Class C Shares redeemed during the first year only.