S000037523 [Member] Performance Management - Vaughan Nelson Select Fund |
Nov. 30, 2025 |
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| Prospectus [Line Items] | |
| Bar Chart and Performance Table [Heading] | Risk/Return Bar Chart and Table |
| Performance Narrative [Text Block] | The bar chart and table shown below provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year-to-year and by showing how the Fund’s average annual returns for the one-year, five-year, ten-year and life-of-class periods (as applicable) compare to those of a broad-based securities market index that reflects the performance of the overall market applicable to the Fund. Performance for Class C shares includes the automatic conversion to Class A shares after eight years, where applicable. The Fund’s past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future. Updated performance information is available online at im.natixis.com and/or by calling the Fund toll-free at 800-225-5478. The chart does not reflect any sales charge that you may be required to pay when you buy or redeem the Fund’s shares. A sales charge will reduce your return. To the extent that a class of shares was subject to the waiver or reimbursement of certain expenses during a period, had such expenses not been waived or reimbursed during the period, total returns would have been lower.
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| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future. |
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table shown below provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year-to-year and by showing how the Fund’s average annual returns for the one-year, five-year, ten-year and life-of-class periods (as applicable) compare to those of a broad-based securities market index that reflects the performance of the overall market applicable to the Fund. |
| Bar Chart Does Not Reflect Sales Loads [Text] | The chart does not reflect any sales charge that you may be required to pay when you buy or redeem the Fund’s shares. A sales charge will reduce your return. |
| Bar Chart [Heading] | Total Returns for Class Y Shares |
| Bar Chart Closing [Text Block] | Highest Quarterly Return: Second Quarter 2020, 25.72% Lowest Quarterly Return: First Quarter 2020, -21.55% |
| Performance Table Heading | Average Annual Total Returns(for the periods ended December 31, 2025) |
| Performance Table Narrative | 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. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their shares through tax-advantaged arrangements, such as 401(k) plans, qualified plans, education savings accounts, such as 529 plans, or individual retirement accounts. The after-tax returns are shown for only one class of the Fund. After-tax returns for the other classes of the Fund will vary. Index performance reflects no deduction for fees, expenses or taxes.
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| Performance Table Uses Highest Federal Rate | 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 | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their shares through tax-advantaged arrangements, such as 401(k) plans, qualified plans, education savings accounts, such as 529 plans, or individual retirement accounts. |
| Performance Table One Class of after Tax Shown [Text] | The after-tax returns are shown for only one class of the Fund.After-tax returns for the other classes of the Fund will vary. |
| Index No Deduction for Fees, Expenses, or Taxes [Text] | Index performance reflects no deduction for fees, expenses or taxes. |
| Performance Availability Website Address [Text] | im.natixis.com |
| Performance Availability Phone [Text] | 800-225-5478 |
| Class Y | |
| Prospectus [Line Items] | |
| Highest Quarterly Return, Label [Optional Text] | Highest Quarterly Return: |
| Highest Quarterly Return | 25.72% |
| Highest Quarterly Return, Date | Jun. 30, 2020 |
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarterly Return: |
| Lowest Quarterly Return | (21.55%) |
| Lowest Quarterly Return, Date | Mar. 31, 2020 |