| Label | Element | Value | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Virtus Seix Tax-Exempt Bond Fund | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Risk/Return [Heading] | rr_RiskReturnHeading | Virtus Seix Tax-Exempt Bond Fund | |||||||||||||
| Objective [Heading] | rr_ObjectiveHeading | Investment Objective | |||||||||||||
| Objective, Primary [Text Block] | rr_ObjectivePrimaryTextBlock | The fund has an investment objective of providing a high level of current income that is exempt from federal income tax. |
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| Expense [Heading] | rr_ExpenseHeading | Fees and Expenses | |||||||||||||
| Expense Narrative [Text Block] | rr_ExpenseNarrativeTextBlock | The tables below illustrate the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts in Class A Shares if you and your family invest, or agree to invest in the future, at least $50,000 in Virtus Funds. More information on these and other discounts is available: (i) from your financial professional or other financial intermediary; (ii) under “Sales Charges” on page 108 of the fund’s prospectus; and (iii) with respect to purchase of shares through specific intermediaries, in Appendix A to the fund’s prospectus, entitled “Intermediary Sales Charge Discounts and Waivers.” |
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| 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 31% of the average value of its portfolio. |
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| Portfolio Turnover, Rate | rr_PortfolioTurnoverRate | 31.00% | |||||||||||||
| Expense Breakpoint Discounts [Text] | rr_ExpenseBreakpointDiscounts | You may qualify for sales charge discounts in Class A Shares if you and your family invest, or agree to invest in the future, at least $50,000 in Virtus Funds. | |||||||||||||
| Expense Breakpoint, Minimum Investment Required [Amount] | rr_ExpenseBreakpointMinimumInvestmentRequiredAmount | $ 50,000 | |||||||||||||
| 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 that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods or continued to hold them. The example also assumes that your investment has a 5% return each year, that the fund’s operating expenses remain the same and that the expense reimbursement agreement remains in place for the contractual period. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
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| Expense Example by, Year, Caption [Text] | rr_ExpenseExampleByYearCaption | Although your actual costs may be higher or lower, based on these assumptions your costs would be: | |||||||||||||
| Strategy [Heading] | rr_StrategyHeading | Principal Investment Strategies | |||||||||||||
| Strategy Narrative [Text Block] | rr_StrategyNarrativeTextBlock | The fund seeks to generate current income exempt from federal income taxes by investing in a diversified portfolio with municipal bonds of varying maturities. The management team focuses on higher quality tax-exempt municipal bonds, gauging the value of a security by issue type, credit quality, and bond structure; however, the fund may invest up to 20% of its net assets in below investment grade tax-exempt municipal bonds. Below investment grade tax-exempt municipal bonds are considered high-yield/high-risk fixed income securities (so-called “junk bonds”). Under normal circumstances, as a matter of fundamental policy, the fund invests at least 80% of its assets in municipal bonds, the income from which is exempt from federal income taxes. The portion of the fund’s assets not invested in tax-exempt securities may be invested in taxable fixed income securities. Income from these taxable investments may be subject to federal, state, and local taxes. |
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| Risk [Heading] | rr_RiskHeading | Principal Risks | |||||||||||||
| Bar Chart and Performance Table [Heading] | rr_BarChartAndPerformanceTableHeading | Performance Information | |||||||||||||
| Performance Narrative [Text Block] | rr_PerformanceNarrativeTextBlock | The Virtus Seix Tax-Exempt Bond Fund, a series of Virtus Opportunities Trust (“Successor Fund”), is the successor of the Virtus Tax-Exempt Bond Fund, a series of Virtus Insight Trust (“Predecessor Fund”), resulting from a reorganization of the Predecessor Fund with and into the Successor Fund on September 23, 2016. The Predecessor Fund and the Successor Fund have identical investment objectives and strategies. The Successor Fund has adopted the past performance of the Predecessor Fund as its own. Therefore, the performance tables below include the performance of the shares of the Predecessor Fund prior to the Successor Fund’s commencement date. 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 a 10-year period. The table shows how the fund’s average annual returns compare to those of a broad-based securities market index, and a style-specific index and more narrowly-based benchmark that reflect the market sectors in which the fund invests. Updated performance information is available at virtus.com or by calling 800-243-1574. |
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| Performance Information Illustrates Variability of Returns [Text] | rr_PerformanceInformationIllustratesVariabilityOfReturns | The Virtus Seix Tax-Exempt Bond Fund, a series of Virtus Opportunities Trust (“Successor Fund”), is the successor of the Virtus Tax-Exempt Bond Fund, a series of Virtus Insight Trust (“Predecessor Fund”), resulting from a reorganization of the Predecessor Fund with and into the Successor Fund on September 23, 2016. The Predecessor Fund and the Successor Fund have identical investment objectives and strategies. The Successor Fund has adopted the past performance of the Predecessor Fund as its own. Therefore, the performance tables below include the performance of the shares of the Predecessor Fund prior to the Successor Fund’s commencement date.The bar chart and table below provide some indication of the potential risks of investing in the fund. | |||||||||||||
| Performance Additional Market Index [Text] | rr_PerformanceAdditionalMarketIndex | ICE BofA 1-22 Year U.S. Municipal Securities Index (reflects no deduction for fees, expenses or taxes) 1.44% 1.17% 2.18% Effective March 22, 2024, the Fund’s broad-based benchmark is the Bloomberg Municipal Bond Index replacing the Bloomberg U.S. Aggregate Bond Index. The subadviser believes that the Bloomberg Municipal Bond Index is more closely matched to the Fund’s principal investment strategy. The Bloomberg Municipal Bond Index is a market capitalization-weighted index that measures the long-term tax-exempt bond market. The index is calculated on a total return basis. The index is unmanaged and not available for direct investment. | |||||||||||||
| 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 I Shares | |||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | rr_BarChartDoesNotReflectSalesLoads | Returns do not reflect sales charges applicable to other share classes and would be lower if they did. | |||||||||||||
| Bar Chart Closing [Text Block] | rr_BarChartClosingTextBlock |
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| Performance Table Heading | rr_PerformanceTableHeading | Average Annual Total Returns (for the periods ended 12/31/24; includes returns of the Predecessor Fund) | |||||||||||||
| 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. After-tax returns are shown only for Class I 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. | |||||||||||||
| 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 I 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 Closing [Text Block] | rr_PerformanceTableClosingTextBlock | Effective March 22, 2024, the Fund’s broad-based benchmark is the Bloomberg Municipal Bond Index replacing the Bloomberg U.S. Aggregate Bond Index. The subadviser believes that the Bloomberg Municipal Bond Index is more closely matched to the Fund’s principal investment strategy. The Bloomberg Municipal Bond Index is a market capitalization-weighted index that measures the long-term tax-exempt bond market. The index is calculated on a total return basis. The index is unmanaged and not available for direct investment. The ICE BofA 1-22 Year US Municipal Securities Index is a subset of the ICE BofA US Municipal Securities Index including all securities with a remaining term to final maturity less than 22 years, calculated on a total return basis. 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 I 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. |
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| Virtus Seix Tax-Exempt Bond Fund | Risk Lose Money [Member] | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | 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. | |||||||||||||
| Virtus Seix Tax-Exempt Bond Fund | Credit Risk | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | > Credit Risk: If the issuer of a debt instrument fails to pay interest or principal in a timely manner, or negative perceptions exist in the market of the issuer’s ability to make such payments, the price of the security may decline. |
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| Virtus Seix Tax-Exempt Bond Fund | Interest Rate Risk | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | > Interest Rate Risk: The values of debt instruments may rise or fall in response to changes in interest rates, and this risk may be enhanced for securities with longer maturities. |
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| Virtus Seix Tax-Exempt Bond Fund | Municipal Securities Risk | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | > Municipal Securities Risk: Events negatively impacting a municipality, municipal security, or the municipal bond market in general, may cause the fund to decrease in value, perhaps significantly. |
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| Virtus Seix Tax-Exempt Bond Fund | High-Yield/High-Risk Fixed Income Securities (Junk Bonds) Risk | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | > High-Yield/High-Risk Fixed Income Securities (Junk Bonds) Risk: There is a greater risk of issuer default, less liquidity, and increased price volatility related to high-yield/high-risk securities than investment grade securities, and high-yield/high-risk securities are generally considered to be speculative. |
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| Virtus Seix Tax-Exempt Bond Fund | Market Volatility Risk | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | > Market Volatility Risk: The value of the securities in the fund may go up or down in response to the prospects of individual companies and/or general economic conditions. Price changes may be short- or long-term. Local, regional or global events such as war or military conflict (e.g., Russia’s invasion of Ukraine), acts of terrorism, the spread of infectious illness or other public health issue, recessions, or other events could have a significant impact on the fund and its investments, including hampering the ability of the fund’s portfolio manager(s) to invest the fund’s assets as intended. |
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| Virtus Seix Tax-Exempt Bond Fund | Income Risk | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | > Income Risk: Income received from the fund may vary widely over the short- and long-term and/or be less than anticipated if the proceeds from maturing securities in the fund are reinvested in lower-yielding securities. |
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| Virtus Seix Tax-Exempt Bond Fund | Prepayment/Call Risk | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | > Prepayment/Call Risk: Issuers may prepay or call their fixed rate obligations when interest rates fall, forcing the fund to reinvest in obligations with lower interest rates and the fund may not benefit fully from the increase in value that other fixed income investments experience when interest rates decline. |
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| Virtus Seix Tax-Exempt Bond Fund | Redemption Risk | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | > Redemption Risk: One or more large shareholders or groups of shareholders may redeem their holdings in the fund, resulting in an adverse impact on remaining shareholders in the fund by causing the fund to take actions it would not otherwise have taken. |
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| Virtus Seix Tax-Exempt Bond Fund | Tax-Exempt Securities Risk | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | > Tax-Exempt Securities Risk: Tax-exempt securities may not provide a higher after-tax return than taxable securities, and/or the tax-exempt status may be lost or limited. |
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| Virtus Seix Tax-Exempt Bond Fund | Tax Liability Risk | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | > Tax Liability Risk: Noncompliant conduct by a municipal bond issuer, or certain adverse interpretations or actions by a government or tax authority, could cause interest from a security to become taxable, possibly retroactively, subjecting shareholders to increased tax liability. |
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| Virtus Seix Tax-Exempt Bond Fund | Bloomberg Municipal Bond 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 | Bloomberg Municipal Bond Index | |||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 1.05% | |||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 0.99% | |||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 2.25% | |||||||||||||
| Virtus Seix Tax-Exempt Bond Fund | Bloomberg U.S. Aggregate Bond 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 | Bloomberg U.S. Aggregate Bond Index | |||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 1.25% | |||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | (0.33%) | |||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 1.35% | |||||||||||||
| Virtus Seix Tax-Exempt Bond Fund | ICE BofA 1-22 Year U.S. Municipal Securities 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 | ICE BofA 1-22 Year U.S. Municipal Securities Index | |||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 1.44% | |||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 1.17% | |||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 2.18% | |||||||||||||
| Virtus Seix Tax-Exempt Bond Fund | Class A Shares | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Trading Symbol | dei_TradingSymbol | HXBZX | |||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | 2.75% | |||||||||||||
| Maximum Deferred Sales Charge (as a percentage of Offering Price) | rr_MaximumDeferredSalesChargeOverOfferingPrice | none | |||||||||||||
| Management Fees | rr_ManagementFeesOverAssets | 0.45% | |||||||||||||
| Distribution and Shareholder Servicing (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | 0.25% | |||||||||||||
| Other Expenses | rr_OtherExpensesOverAssets | 0.41% | |||||||||||||
| Total Annual Fund Operating Expenses | rr_ExpensesOverAssets | 1.11% | |||||||||||||
| Less: Fee Waiver and/or Expense Reimbursement | rr_FeeWaiverOrReimbursementOverAssets | (0.28%) | [1] | ||||||||||||
| Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement | rr_NetExpensesOverAssets | 0.83% | [1] | ||||||||||||
| 1 Year | rr_ExpenseExampleYear01 | $ 357 | |||||||||||||
| 3 Years | rr_ExpenseExampleYear03 | 591 | |||||||||||||
| 5 Years | rr_ExpenseExampleYear05 | 843 | |||||||||||||
| 10 Years | rr_ExpenseExampleYear10 | 1,565 | |||||||||||||
| 1 Year | rr_ExpenseExampleNoRedemptionYear01 | 357 | |||||||||||||
| 3 Years | rr_ExpenseExampleNoRedemptionYear03 | 591 | |||||||||||||
| 5 Years | rr_ExpenseExampleNoRedemptionYear05 | 843 | |||||||||||||
| 10 Years | rr_ExpenseExampleNoRedemptionYear10 | $ 1,565 | |||||||||||||
| Label | rr_AverageAnnualReturnLabel | Return Before Taxes | |||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | (1.85%) | |||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | (0.09%) | |||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 1.28% | |||||||||||||
| Virtus Seix Tax-Exempt Bond Fund | Class C Shares | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Trading Symbol | dei_TradingSymbol | PXCZX | |||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | |||||||||||||
| Maximum Deferred Sales Charge (as a percentage of Offering Price) | rr_MaximumDeferredSalesChargeOverOfferingPrice | 1.00% | [2] | ||||||||||||
| Management Fees | rr_ManagementFeesOverAssets | 0.45% | |||||||||||||
| Distribution and Shareholder Servicing (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | 1.00% | |||||||||||||
| Other Expenses | rr_OtherExpensesOverAssets | 0.40% | |||||||||||||
| Total Annual Fund Operating Expenses | rr_ExpensesOverAssets | 1.85% | |||||||||||||
| Less: Fee Waiver and/or Expense Reimbursement | rr_FeeWaiverOrReimbursementOverAssets | (0.27%) | [1] | ||||||||||||
| Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement | rr_NetExpensesOverAssets | 1.58% | [1] | ||||||||||||
| 1 Year | rr_ExpenseExampleYear01 | $ 261 | |||||||||||||
| 3 Years | rr_ExpenseExampleYear03 | 556 | |||||||||||||
| 5 Years | rr_ExpenseExampleYear05 | 976 | |||||||||||||
| 10 Years | rr_ExpenseExampleYear10 | 2,147 | |||||||||||||
| 1 Year | rr_ExpenseExampleNoRedemptionYear01 | 161 | |||||||||||||
| 3 Years | rr_ExpenseExampleNoRedemptionYear03 | 556 | |||||||||||||
| 5 Years | rr_ExpenseExampleNoRedemptionYear05 | 976 | |||||||||||||
| 10 Years | rr_ExpenseExampleNoRedemptionYear10 | $ 2,147 | |||||||||||||
| Label | rr_AverageAnnualReturnLabel | Return Before Taxes | |||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 0.17% | |||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | (0.28%) | |||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 0.80% | |||||||||||||
| Virtus Seix Tax-Exempt Bond Fund | Class I Shares | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Trading Symbol | dei_TradingSymbol | HXBIX | |||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | |||||||||||||
| Maximum Deferred Sales Charge (as a percentage of Offering Price) | rr_MaximumDeferredSalesChargeOverOfferingPrice | none | |||||||||||||
| Management Fees | rr_ManagementFeesOverAssets | 0.45% | |||||||||||||
| Distribution and Shareholder Servicing (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | none | |||||||||||||
| Other Expenses | rr_OtherExpensesOverAssets | 0.42% | |||||||||||||
| Total Annual Fund Operating Expenses | rr_ExpensesOverAssets | 0.87% | |||||||||||||
| Less: Fee Waiver and/or Expense Reimbursement | rr_FeeWaiverOrReimbursementOverAssets | (0.29%) | [1] | ||||||||||||
| Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement | rr_NetExpensesOverAssets | 0.58% | [1] | ||||||||||||
| 1 Year | rr_ExpenseExampleYear01 | $ 59 | |||||||||||||
| 3 Years | rr_ExpenseExampleYear03 | 249 | |||||||||||||
| 5 Years | rr_ExpenseExampleYear05 | 454 | |||||||||||||
| 10 Years | rr_ExpenseExampleYear10 | 1,046 | |||||||||||||
| 1 Year | rr_ExpenseExampleNoRedemptionYear01 | 59 | |||||||||||||
| 3 Years | rr_ExpenseExampleNoRedemptionYear03 | 249 | |||||||||||||
| 5 Years | rr_ExpenseExampleNoRedemptionYear05 | 454 | |||||||||||||
| 10 Years | rr_ExpenseExampleNoRedemptionYear10 | $ 1,046 | |||||||||||||
| Annual Return 2015 | rr_AnnualReturn2015 | 2.64% | |||||||||||||
| Annual Return 2016 | rr_AnnualReturn2016 | (0.16%) | |||||||||||||
| Annual Return 2017 | rr_AnnualReturn2017 | 4.68% | |||||||||||||
| Annual Return 2018 | rr_AnnualReturn2018 | 0.80% | |||||||||||||
| Annual Return 2019 | rr_AnnualReturn2019 | 6.80% | |||||||||||||
| Annual Return 2020 | rr_AnnualReturn2020 | 4.49% | |||||||||||||
| Annual Return 2021 | rr_AnnualReturn2021 | 1.27% | |||||||||||||
| Annual Return 2022 | rr_AnnualReturn2022 | (7.76%) | |||||||||||||
| Annual Return 2023 | rr_AnnualReturn2023 | 4.96% | |||||||||||||
| Annual Return 2024 | rr_AnnualReturn2024 | 1.18% | |||||||||||||
| Bar Chart, Year to Date Return | rr_BarChartYearToDateReturn | none | |||||||||||||
| Label | rr_HighestQuarterlyReturnLabel | Best Quarter | |||||||||||||
| Highest Quarterly Return, Date | rr_BarChartHighestQuarterlyReturnDate | Dec. 31, 2023 | |||||||||||||
| Highest Quarterly Return | rr_BarChartHighestQuarterlyReturn | 5.74% | |||||||||||||
| Label | rr_LowestQuarterlyReturnLabel | Worst Quarter | |||||||||||||
| Lowest Quarterly Return, Date | rr_BarChartLowestQuarterlyReturnDate | Mar. 31, 2022 | |||||||||||||
| Lowest Quarterly Return | rr_BarChartLowestQuarterlyReturn | (5.57%) | |||||||||||||
| Label | rr_AverageAnnualReturnLabel | Return Before Taxes | |||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 1.18% | |||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 0.72% | |||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 1.81% | |||||||||||||
| Virtus Seix Tax-Exempt Bond Fund | Class I Shares | After Taxes on Distributions | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Label | rr_AverageAnnualReturnLabel | Return After Taxes on Distributions | |||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 1.18% | |||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 0.66% | |||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 1.75% | |||||||||||||
| Virtus Seix Tax-Exempt Bond Fund | Class I Shares | After Taxes on Distributions and Sales | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Label | rr_AverageAnnualReturnLabel | Return After Taxes on Distributions and Sale of Fund Shares | |||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 1.89% | |||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 1.15% | |||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 2.02% | |||||||||||||
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