| Form N-CSR Cover | 12 Months Ended |
| Oct. 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | INVESTMENT MANAGERS SERIES TRUST |
| Entity Central Index Key | 0001318342 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Oct. 31, 2024 |
| Shareholder Report | 12 Months Ended |
| Oct. 31, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | INVESTMENT MANAGERS SERIES TRUST |
| Entity Central Index Key | 0001318342 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Oct. 31, 2024 |
| C000078165 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Vaughan Nelson Emerging Markets Fund |
| Class Name | Institutional Class |
| Trading Symbol | ADVMX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Vaughan Nelson Emerging Markets Fund (“Fund”) for the period of November 1, 2023 to October 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.im.natixis.com/en-us/products/mutual-funds/funds.vaughan-nelson-emerging-markets-fund.ADVMX.#literature |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | (888) 660-6610 |
| Additional Information Website | https://www.im.natixis.com/en-us/products/mutual-funds/funds.vaughan-nelson-emerging-markets-fund.ADVMX.#literature |
| Expenses [Text Block] | Fund Expenses (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 investment Costs paid as a percentage Vaughan Nelson Emerging Markets Fund $ 1.03 % |
| Expenses Paid, Amount | $ 109 |
| Expense Ratio, Percent | 1.03% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS For the 12-month period ended October 31, 2024, the Fund generated a return of 11.87% compared to the MSCI Emerging Markets Net benchmark of 25.31% and the MSCI Emerging Markets SMID Net benchmark return of 22.04%. The Fund was impacted from lagging performance in Hong Kong and South Korea. TOP PERFORMANCE CONTRIBUTORS - From a country perspective, India, Canada, Ireland, and Turkey were the top contributors. - From a sector perspective, the top contributor was Health Care. Top Position Contributors: 1. Powertech Technology 2. Lotes 3. Aegis Logistics TOP PERFORMANCE DETRACTORS - From a country perspective, the biggest detractors were Hong Kong, South Korea, Taiwan, and the United States. - From a sector perspective, the biggest detractors were Information Technology, Industrials, and Consumer Discretionary. Top Position Detractors: 1. Taiwan Semi 2. Kosmos Energy 3. Nanya Technology |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. |
| Line Graph [Table Text Block] | Fund Performance The following graph and chart compare the initial and subsequent account values at the end of each of the most recently completed 10 fiscal years of the Fund, or for the life of the Fund, if shorter. It assumes a $100,000 initial investment at the beginning of the first fiscal year in an appropriate, broad-based securities market index for the same period. GROWTH OF $100,000 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years Vaughan Nelson Emerging Markets Fund (Institutional Class/ADVMX) 11.87 % 5.37 % 2.09 % MSCI Emerging Markets Index Net (USD) 25.31 % 3.93 % 3.43 % MSCI Emerging Markets SMID Cap Index Net (USD) 22.04 % 7.42 % 4.27 % |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Material Change Date | Mar. 01, 2024 |
| Updated Performance Information Location [Text Block] | Visit https://www.im.natixis.com/en-us/products/mutual-funds/funds.vaughan-nelson-emerging-markets-fund.ADVKX#performance_distributions |
| Net Assets | $ 39,798,323 |
| Holdings Count | Holding | 44 |
| Advisory Fees Paid, Amount | $ 22,906 |
| Investment Company Portfolio Turnover | 117% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics that you should pay attention to. Fund net assets $ Total number of portfolio holdings 44 Total advisory fees paid (net) $ Portfolio turnover rate as of the end of the reporting period 117 % |
| Holdings [Text Block] | Graphical Representation of Holdings The tables below show the investment makeup of the Fund, representing percentage of the total net assets of the Fund. The Top Ten Holdings and Country Allocation exclude short-term holdings, if any. The Country Top Ten Holdings Taiwan Semiconductor Manufacturing Co., Ltd. 11.7 % Tongcheng Travel Holdings Ltd. 4.3 % Accton Technology Corp. 4.3 % Tencent Holdings Ltd. 4.0 % TechnipFMC PLC 3.1 % Grupo Mexico S.A.B. de C.V. 3.0 % Bilibili, Inc. - ADR 2.8 % Haitian International Holdings Ltd. 2.7 % PDD Holdings, Inc. - ADR 2.7 % Bank Negara Indonesia Persero Tbk P.T. 2.6 % Asset Allocation Country Allocation |
| Largest Holdings [Text Block] | Top Ten Holdings Taiwan Semiconductor Manufacturing Co., Ltd. 11.7 % Tongcheng Travel Holdings Ltd. 4.3 % Accton Technology Corp. 4.3 % Tencent Holdings Ltd. 4.0 % TechnipFMC PLC 3.1 % Grupo Mexico S.A.B. de C.V. 3.0 % Bilibili, Inc. - ADR 2.8 % Haitian International Holdings Ltd. 2.7 % PDD Holdings, Inc. - ADR 2.7 % Bank Negara Indonesia Persero Tbk P.T. 2.6 % |
| Material Fund Change [Text Block] | Material Fund Changes As of March 1, 2024, the Fund was renamed to the Vaughan Nelson Emerging Markets Fund. Effective March 1, 2024 (the "Effective Date"), the Fund lowered its management fee from 0.95% to 0.85%. This is a summary of certain changes since November 1, 2023. t https://www.im.natixis.com/en-us/products/mutual-funds.vaughan-nelson-international-fund.ADVJX#literature |
| Material Fund Change Name [Text Block] | As of March 1, 2024, the Fund was renamed to the Vaughan Nelson Emerging Markets Fund. |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024 (the "Effective Date"), the Fund lowered its management fee from 0.95% to 0.85%. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes since November 1, 2023. t https://www.im.natixis.com/en-us/products/mutual-funds.vaughan-nelson-international-fund.ADVJX#literature |
| Updated Prospectus Phone Number | 1-888-660-6610 |
| Updated Prospectus Web Address | https://www.im.natixis.com/en-us/products/mutual-funds.vaughan-nelson-international-fund.ADVJX#literature |
| Accountant Change Disagreements [Text Block] | Changes in and Disagreements with Accountants There were no changes in or disagreements with the Fund's accountants during the reporting period. |
| C000216360 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Vaughan Nelson Emerging Markets Fund |
| Class Name | Investor Class |
| Trading Symbol | ADVKX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Vaughan Nelson Emerging Markets Fund (“Fund”) for the period of November 1, 2023 to October 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.im.natixis.com/en-us/products/mutual-funds/funds.vaughan-nelson-emerging-markets-fund.ADVMX.#literature |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | (888) 660-6610 |
| Additional Information Website | https://www.im.natixis.com/en-us/products/mutual-funds/funds.vaughan-nelson-emerging-markets-fund.ADVMX.#literature |
| Expenses [Text Block] | Fund Expenses (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 investment Costs paid as a percentage Vaughan Nelson Emerging Markets Fund $ 1.28 % |
| Expenses Paid, Amount | $ 135 |
| Expense Ratio, Percent | 1.28% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS SUMMARY OF RESULTS For the 12-month period ended October 31, 2024, the Fund generated a return of 11.60% compared to the MSCI Emerging Markets Net benchmark of 25.31% and the MSCI Emerging Markets SMID Net benchmark return of 22.04%. The Fund was impacted from lagging performance in Hong Kong and South Korea. TOP PERFORMANCE CONTRIBUTORS - From a country perspective, India, Canada, Ireland, and Turkey were the top contributors. - From a sector perspective, the top contributor was Health Care. Top Position Contributors: 1. Powertech Technology 2. Lotes 3. Aegis Logistics TOP PERFORMANCE DETRACTORS - From a country perspective, the biggest detractors were Hong Kong, South Korea, Taiwan, and the United States. - From a sector perspective, the biggest detractors were Information Technology, Industrials, and Consumer Discretionary. Top Position Detractors: 1. Taiwan Semi 2. Kosmos Energy 3. Nanya Technology |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. |
| Line Graph [Table Text Block] | Fund Performance The following graph and chart compare the initial and subsequent account values at the end of each of the most recently completed 10 fiscal years of the Fund, or for the life of the Fund, if shorter. It assumes a $10,000 initial investment at the beginning of the first fiscal year in an appropriate, broad-based securities market index for the same period. GROWTH OF $10,000 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years Vaughan Nelson Emerging Markets Fund (Investor Class/ADVKX) 1 11.60 % 5.10 % 1.83 % MSCI Emerging Markets Index Net (USD) 25.31 % 3.93 % 3.43 % MSCI Emerging Markets SMID Cap Index Net (USD) 22.04 % 7.42 % 4.27 % 1 Investor Class shares were first offered on December 2, 2019. The performance figures for Investor Class shares include the performance for the Institutional Class shares prior to December 2, 2019, adjusted for Investor Class shares' expenses, which are higher than expenses of Institutional Class shares. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Material Change Date | Mar. 01, 2024 |
| Updated Performance Information Location [Text Block] | Visit https://www.im.natixis.com/en-us/products/mutual-funds/funds.vaughan-nelson-emerging-markets-fund.ADVKX#performance_distributions |
| Net Assets | $ 39,798,323 |
| Holdings Count | Holding | 44 |
| Advisory Fees Paid, Amount | $ 22,906 |
| Investment Company Portfolio Turnover | 117% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics that you should pay attention to. Fund net assets $ Total number of portfolio holdings 44 Total advisory fees paid (net) $ Portfolio turnover rate as of the end of the reporting period 117 % |
| Holdings [Text Block] | Graphical Representation of Holdings The tables below show the investment makeup of the Fund, representing percentage of the total net assets of the Fund. The Top Ten Holdings and Country Allocation exclude short-term holdings, if any. The Country Top Ten Holdings Taiwan Semiconductor Manufacturing Co., Ltd. 11.7 % Tongcheng Travel Holdings Ltd. 4.3 % Accton Technology Corp. 4.3 % Tencent Holdings Ltd. 4.0 % TechnipFMC PLC 3.1 % Grupo Mexico S.A.B. de C.V. 3.0 % Bilibili, Inc. - ADR 2.8 % Haitian International Holdings Ltd. 2.7 % PDD Holdings, Inc. - ADR 2.7 % Bank Negara Indonesia Persero Tbk P.T. 2.6 % Asset Allocation Country Allocation |
| Largest Holdings [Text Block] | Top Ten Holdings Taiwan Semiconductor Manufacturing Co., Ltd. 11.7 % Tongcheng Travel Holdings Ltd. 4.3 % Accton Technology Corp. 4.3 % Tencent Holdings Ltd. 4.0 % TechnipFMC PLC 3.1 % Grupo Mexico S.A.B. de C.V. 3.0 % Bilibili, Inc. - ADR 2.8 % Haitian International Holdings Ltd. 2.7 % PDD Holdings, Inc. - ADR 2.7 % Bank Negara Indonesia Persero Tbk P.T. 2.6 % |
| Material Fund Change [Text Block] | Material Fund Changes As of March 1, 2024, the Fund was renamed to the Vaughan Nelson Emerging Markets Fund. Effective March 1, 2024 (the "Effective Date"), the Fund lowered its management fee from 0.95% to 0.85%. This is a summary of certain changes since November 1, 2023. https://www.im.natixis.com/en-us/products/mutual-funds.vaughan-nelson-international-fund.ADVJX#literature, |
| Material Fund Change Name [Text Block] | As of March 1, 2024, the Fund was renamed to the Vaughan Nelson Emerging Markets Fund. |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024 (the "Effective Date"), the Fund lowered its management fee from 0.95% to 0.85%. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes since November 1, 2023. https://www.im.natixis.com/en-us/products/mutual-funds.vaughan-nelson-international-fund.ADVJX#literature, |
| Updated Prospectus Phone Number | 1-888-660-6610 |
| Updated Prospectus Web Address | https://www.im.natixis.com/en-us/products/mutual-funds.vaughan-nelson-international-fund.ADVJX#literature |
| Accountant Change Disagreements [Text Block] | Changes in and Disagreements with Accountants There were no changes in or disagreements with the Fund's accountants during the reporting period. |
| C000135917 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Vaughan Nelson International Fund |
| Class Name | Institutional Class |
| Trading Symbol | ADVLX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Vaughan Nelson International Fund (“Fund”) for the period of November 1, 2023 to October 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.im.natixis.com/en-us/products/mutual-funds/funds.vaughan-nelson-international-fund.ADVJX#literature |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | (888) 660-6610 |
| Additional Information Website | https://www.im.natixis.com/en-us/products/mutual-funds/funds.vaughan-nelson-international-fund.ADVJX#literature |
| Expenses [Text Block] | Fund Expenses (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 investment Costs paid as a percentage Vaughan Nelson International Fund $ 0.94 % |
| Expenses Paid, Amount | $ 103 |
| Expense Ratio, Percent | 0.94% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS For the 12-month period ended October 31, 2024, the Fund generated a return of 19.70% compared to the MSCI All Country World Ex US Net benchmark of 24.33%. The Fund was impacted from lagging performance in Germany, TOP PERFORMANCE CONTRIBUTORS - From a country perspective, Hong Kong, Mexico, France, Sweden, and Denmark were the top contributors. - From a sector perspective, the top contributors were Consumer Discretionary, Materials, Consumer Staples, and Financials. Top Position Contributors: 1. Meituan 2. Carnival 3. Horiba TOP PERFORMANCE DETRACTORS - From a country perspective, the biggest detractors were Germany, South Korea, Switzerland, and Canada. - From a sector perspective, the biggest detractors were Industrials, Health Care, Information Technology, and Energy. Top Position Detractors: 1. Sartorius 2. Marlowe 3. Kosmos Energy |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. |
| Line Graph [Table Text Block] | Fund Performance The following graph and chart compare the initial and subsequent account values at the end of each of the most recently completed 10 fiscal years of the Fund, or for the life of the Fund, if shorter. It assumes a $100,000 initial investment at the beginning of the first fiscal year in an appropriate, broad-based securities market index for the same period. GROWTH OF $100,000 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years Vaughan Nelson International Fund (Institutional Class/ADVLX) 19.70 % 1.93 % 3.44 % MSCI ACWI ex USA Index 24.33 % 5.78 % 4.79 % MSCI EAFE SMALL CAP Index Net (USD) 22.97 % 4.10 % 5.73 % |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Material Change Date | Mar. 01, 2024 |
| Net Assets | $ 26,634,391 |
| Holdings Count | Holding | 24 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 205% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics that you should pay attention to. Fund net assets $ Total number of portfolio holdings 24 Total advisory fees paid (net) $ Portfolio turnover rate as of the end of the reporting period 205 % |
| Holdings [Text Block] | Graphical Representation of Holdings The tables below show the investment makeup of the Fund, representing percentage of the total net assets of the Fund. The Top Ten Holdings and Country Allocation exclude short-term holdings, if any. The Country Top Ten Holdings Monolithic Power Systems, Inc. 7.3 % Taiwan Semiconductor Manufacturing Co., Ltd. 6.7 % PDD Holdings, Inc. - ADR 6.2 % TechnipFMC PLC 5.2 % TFI International, Inc. 5.0 % Wise PLC - Class A 5.0 % Meituan - Class B 5.0 % Intermediate Capital Group PLC 4.9 % Shopify, Inc. 4.9 % UBS Group A.G. 4.8 % Asset Allocation Country Allocation |
| Largest Holdings [Text Block] | Top Ten Holdings Monolithic Power Systems, Inc. 7.3 % Taiwan Semiconductor Manufacturing Co., Ltd. 6.7 % PDD Holdings, Inc. - ADR 6.2 % TechnipFMC PLC 5.2 % TFI International, Inc. 5.0 % Wise PLC - Class A 5.0 % Meituan - Class B 5.0 % Intermediate Capital Group PLC 4.9 % Shopify, Inc. 4.9 % UBS Group A.G. 4.8 % |
| Material Fund Change [Text Block] | Material Fund Changes As of March 1, 2024, the Fund was renamed to the Vaughan Nelson International Fund. Effective March 1, 2024, (the "Effective Date"), the Fund lowered its management fee from 0.85% to 0.75%. This is a summary of certain changes since November 1, 2023. https://www.im.natixis.com/en-us/products/mutual-funds.vaughan-nelson-international-fund.ADVJX#literature, |
| Material Fund Change Name [Text Block] | As of March 1, 2024, the Fund was renamed to the Vaughan Nelson International Fund. |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, (the "Effective Date"), the Fund lowered its management fee from 0.85% to 0.75%. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes since November 1, 2023. https://www.im.natixis.com/en-us/products/mutual-funds.vaughan-nelson-international-fund.ADVJX#literature, |
| Updated Prospectus Phone Number | 1-888-660-6610 |
| Updated Prospectus Web Address | https://www.im.natixis.com/en-us/products/mutual-funds.vaughan-nelson-international-fund.ADVJX#literature |
| Accountant Change Disagreements [Text Block] | Changes in and Disagreements with Accountants There were no changes in or disagreements with the Fund's accountants during the reporting period. |
| C000216361 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Vaughan Nelson International Fund |
| Class Name | Investor Class |
| Trading Symbol | ADVJX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Vaughan Nelson International Fund (“Fund”) for the period of November 1, 2023 to October 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.im.natixis.com/en-us/products/mutual-funds/funds.vaughan-nelson-international-fund.ADVJX#literature |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | (888) 660-6610 |
| Additional Information Website | https://www.im.natixis.com/en-us/products/mutual-funds/funds.vaughan-nelson-international-fund.ADVJX#literature |
| Expenses [Text Block] | Fund Expenses (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 investment Costs paid as a percentage Vaughan Nelson International Fund $ 1.19 % |
| Expenses Paid, Amount | $ 131 |
| Expense Ratio, Percent | 1.19% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS For the 12-month period ended October 31, 2024, the Fund generated a return of 19.44% compared to the MSCI All Country World Ex US Net benchmark of 24.33%. The Fund was impacted from lagging performance in Germany, South Korea, and Switzerland. TOP PERFORMANCE CONTRIBUTORS - From a country perspective, Hong Kong, Mexico, France, Sweden, and Denmark were the top contributors. - From a sector perspective, the top contributors were Consumer Discretionary, Materials, Consumer Staples, and Financials. Top Position Contributors: 1. Meituan 2. Carnival 3. Horiba TOP PERFORMANCE DETRACTORS - From a country perspective, the biggest detractors were Germany, South Korea, Switzerland, and Canada. - From a sector perspective, the biggest detractors were Industrials, Health Care, Information Technology, and Energy. Top Position Detractors: 1. Sartorius 2. Marlowe 3. Kosmos Energy |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. |
| Line Graph [Table Text Block] | Fund Performance The following graph and chart compare the initial and subsequent account values at the end of each of the most recently completed 10 fiscal years of the Fund, or for the life of the Fund, if shorter. It assumes a $10,000 initial investment at the beginning of the first fiscal year in an appropriate, broad-based securities market index for the same period. GROWTH OF $10,000 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years Vaughan Nelson International Fund (Investor Class/ADVJX) 1 19.44 % 1.67 % 3.18 % MSCI ACWI ex USA Index 24.33 % 5.78 % 4.79 % MSCI EAFE SMALL CAP Index Net (USD) 22.97 % 4.10 % 5.73 % 1 Investor Class shares were first offered on December 2, 2019. The performance figures for Investor Class shares include the performance for the Institutional Class shares prior to December 2, 2019, adjusted for Investor Class shares' expenses, which are higher than expenses of Institutional Class shares. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Material Change Date | Mar. 01, 2024 |
| Net Assets | $ 26,634,391 |
| Holdings Count | Holding | 24 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 205% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics that you should pay attention to. Fund net assets $ Total number of portfolio holdings 24 Total advisory fees paid (net) $ Portfolio turnover rate as of the end of the reporting period 205 % |
| Holdings [Text Block] | Graphical Representation of Holdings The tables below show the investment makeup of the Fund, representing percentage of the total net assets of the Fund. The Top Ten Holdings and Country Allocation exclude short-term holdings, if any. The Country Top Ten Holdings Monolithic Power Systems, Inc. 7.3 % Taiwan Semiconductor Manufacturing Co., Ltd. 6.7 % PDD Holdings, Inc. - ADR 6.2 % TechnipFMC PLC 5.2 % TFI International, Inc. 5.0 % Wise PLC - Class A 5.0 % Meituan - Class B 5.0 % Intermediate Capital Group PLC 4.9 % Shopify, Inc. 4.9 % UBS Group A.G. 4.8 % Asset Allocation Country Allocation |
| Largest Holdings [Text Block] | Top Ten Holdings Monolithic Power Systems, Inc. 7.3 % Taiwan Semiconductor Manufacturing Co., Ltd. 6.7 % PDD Holdings, Inc. - ADR 6.2 % TechnipFMC PLC 5.2 % TFI International, Inc. 5.0 % Wise PLC - Class A 5.0 % Meituan - Class B 5.0 % Intermediate Capital Group PLC 4.9 % Shopify, Inc. 4.9 % UBS Group A.G. 4.8 % |
| Material Fund Change [Text Block] | Material Fund Changes As of March 1, 2024, the Fund was renamed to the Vaughan Nelson International Fund. Effective March 1, 2024, (the "Effective Date"), the Fund lowered its management fee from 0.85% to 0.75%. This is a summary of certain changes since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025, at https://www.im.natixis.com/en-us/products/mutual-funds/funds.vaughan-nelson-international-fund.ADVJX#literature |
| Material Fund Change Name [Text Block] | As of March 1, 2024, the Fund was renamed to the Vaughan Nelson International Fund. |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, (the "Effective Date"), the Fund lowered its management fee from 0.85% to 0.75%. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025, at https://www.im.natixis.com/en-us/products/mutual-funds/funds.vaughan-nelson-international-fund.ADVJX#literature |
| Updated Prospectus Phone Number | 1-888-660-6610 |
| Updated Prospectus Web Address | https://www.im.natixis.com/en-us/products/mutual-funds/funds.vaughan-nelson-international-fund.ADVJX#literature |
| Accountant Change Disagreements [Text Block] | Changes in and Disagreements with Accountants There were no changes in or disagreements with the Fund's accountants during the reporting period. |
| Shareholder Report, Line Graph (Details) - USD ($) | 12 Months Ended | 60 Months Ended | 120 Months Ended | |||||||||||
| Oct. 31, 2024 | Oct. 31, 2024 | Oct. 31, 2024 | Oct. 31, 2023 | Oct. 31, 2022 | Oct. 31, 2021 | Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2018 | Oct. 31, 2017 | Oct. 31, 2016 | Oct. 31, 2015 | Oct. 31, 2014 | ||
| C000078165 [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | Vaughan Nelson Emerging Markets Fund (Institutional Class/ADVMX) | |||||||||||||
| Account Value | $ 122,953 | $ 122,953 | $ 122,953 | $ 109,906 | $ 99,604 | $ 121,262 | $ 93,142 | $ 94,660 | $ 94,209 | $ 111,095 | $ 94,339 | $ 87,111 | $ 100,000 | |
| Average Annual Return, Percent | 11.87% | 5.37% | 2.09% | |||||||||||
| C000216360 [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | Vaughan Nelson Emerging Markets Fund (Investor Class/ADVKX) | |||||||||||||
| Account Value | $ 119,881 | $ 119,881 | $ 119,881 | 107,418 | 97,579 | 119,146 | 91,683 | 93,485 | 93,272 | 110,266 | 93,869 | 86,892 | 100,000 | |
| Average Annual Return, Percent | [1] | 11.60% | 5.10% | 1.83% | ||||||||||
| C000135917 [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | Vaughan Nelson International Fund (Institutional Class/ADVLX) | |||||||||||||
| Account Value | $ 140,255 | $ 140,255 | $ 140,255 | 117,168 | 121,251 | 180,097 | 130,140 | 127,448 | 120,554 | 124,233 | 101,445 | 97,105 | 100,000 | |
| Average Annual Return, Percent | 19.70% | 1.93% | 3.44% | |||||||||||
| C000216361 [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | Vaughan Nelson International Fund (Investor Class/ADVJX) | |||||||||||||
| Account Value | $ 136,751 | $ 136,751 | $ 136,751 | 114,496 | 118,781 | 176,959 | 128,229 | 125,870 | 119,358 | 123,308 | 100,939 | 96,861 | 100,000 | |
| Average Annual Return, Percent | [2] | 19.44% | 1.67% | 3.18% | ||||||||||
| MSCI Emerging Markets Index Net USD [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | MSCI Emerging Markets Index Net (USD) | |||||||||||||
| Account Value | $ 140,118 | $ 140,118 | $ 140,118 | 111,814 | 100,914 | 146,310 | 125,093 | 115,559 | 103,310 | 118,090 | 93,388 | 85,468 | 100,000 | |
| Average Annual Return, Percent | 25.31% | 3.93% | 3.43% | |||||||||||
| MSCI ACWI ex USA Index [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | MSCI ACWI ex USA Index | |||||||||||||
| Account Value | $ 159,724 | $ 159,724 | $ 159,724 | 128,465 | 114,627 | 152,282 | 117,446 | 120,594 | 108,382 | 118,116 | 95,534 | 95,320 | 100,000 | |
| Average Annual Return, Percent | 24.33% | 5.78% | 4.79% | |||||||||||
| MSCI Emerging Markets SMID Cap Index Net USD [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | MSCI Emerging Markets SMID Cap Index Net (USD) | |||||||||||||
| Account Value | $ 151,975 | $ 151,975 | $ 151,975 | 124,529 | 109,691 | 144,622 | 105,439 | 106,275 | 96,254 | 112,592 | 93,921 | 89,187 | 100,000 | |
| Average Annual Return, Percent | 22.04% | 7.42% | 4.27% | |||||||||||
| MSCI EAFE SMALL CAP Index Net USD [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | MSCI EAFE SMALL CAP Index Net (USD) | |||||||||||||
| Account Value | $ 174,618 | $ 174,618 | $ 174,618 | $ 142,006 | $ 133,371 | $ 191,303 | $ 140,901 | $ 142,850 | $ 131,275 | $ 142,400 | $ 111,676 | $ 108,446 | $ 100,000 | |
| Average Annual Return, Percent | 22.97% | 4.10% | 5.73% | |||||||||||
| [1]Investor Class shares were first offered on December 2, 2019. The performance figures for Investor Class shares include the performance for the Institutional Class shares prior to December 2, 2019, adjusted for Investor Class shares' expenses, which are higher than expenses of Institutional Class shares.[2]Investor Class shares were first offered on December 2, 2019. The performance figures for Investor Class shares include the performance for the Institutional Class shares prior to December 2, 2019, adjusted for Investor Class shares' expenses, which are higher than expenses of Institutional Class shares. | ||||||||||||||
| Shareholder Report, Holdings (Details) | Oct. 31, 2024 |
| C000078165 [Member] | Taiwan Semiconductor Manufacturing Co Ltd [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.70% |
| C000078165 [Member] | Tongcheng Travel Holdings Ltd [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000078165 [Member] | Accton Technology Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000078165 [Member] | Tencent Holdings Ltd [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000078165 [Member] | TechnipFMC PLC [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| C000078165 [Member] | Grupo Mexico S A B de C V [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000078165 [Member] | Bilibili Inc ADR [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000078165 [Member] | Haitian International Holdings Ltd [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000078165 [Member] | PDD Holdings Inc ADR [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000078165 [Member] | Bank Negara Indonesia Persero Tbk P T [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000078165 [Member] | UNITED ARAB EMIRATES | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000078165 [Member] | BRAZIL | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000078165 [Member] | CANADA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000078165 [Member] | CHINA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.60% |
| C000078165 [Member] | GERMANY | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000078165 [Member] | UNITED KINGDOM | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| C000078165 [Member] | INDONESIA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.70% |
| C000078165 [Member] | IRELAND | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000078165 [Member] | INDIA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000078165 [Member] | MEXICO | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000078165 [Member] | PHILIPPINES | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000078165 [Member] | SAUDI ARABIA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000078165 [Member] | THAILAND | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000078165 [Member] | TAIWAN | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29.10% |
| C000078165 [Member] | UNITED STATES | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| C000078165 [Member] | Common Stock [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 98.10% |
| C000078165 [Member] | Other Assets in Excess of Liabilities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| C000216360 [Member] | Taiwan Semiconductor Manufacturing Co Ltd [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.70% |
| C000216360 [Member] | Tongcheng Travel Holdings Ltd [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000216360 [Member] | Accton Technology Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000216360 [Member] | Tencent Holdings Ltd [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000216360 [Member] | TechnipFMC PLC [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| C000216360 [Member] | Grupo Mexico S A B de C V [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000216360 [Member] | Bilibili Inc ADR [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000216360 [Member] | Haitian International Holdings Ltd [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000216360 [Member] | PDD Holdings Inc ADR [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000216360 [Member] | Bank Negara Indonesia Persero Tbk P T [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000216360 [Member] | UNITED ARAB EMIRATES | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000216360 [Member] | BRAZIL | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000216360 [Member] | CANADA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000216360 [Member] | CHINA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.60% |
| C000216360 [Member] | GERMANY | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000216360 [Member] | UNITED KINGDOM | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| C000216360 [Member] | INDONESIA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.70% |
| C000216360 [Member] | IRELAND | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000216360 [Member] | INDIA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000216360 [Member] | MEXICO | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000216360 [Member] | PHILIPPINES | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000216360 [Member] | SAUDI ARABIA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000216360 [Member] | THAILAND | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000216360 [Member] | TAIWAN | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29.10% |
| C000216360 [Member] | UNITED STATES | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| C000216360 [Member] | Common Stock [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 98.10% |
| C000216360 [Member] | Other Assets in Excess of Liabilities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| C000135917 [Member] | Taiwan Semiconductor Manufacturing Co Ltd [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.70% |
| C000135917 [Member] | TechnipFMC PLC [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000135917 [Member] | PDD Holdings Inc ADR [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000135917 [Member] | Monolithic Power Systems Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| C000135917 [Member] | TFI International Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000135917 [Member] | Wise PLC Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000135917 [Member] | Meituan Class B [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000135917 [Member] | Intermediate Capital Group PLC [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000135917 [Member] | Shopify Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000135917 [Member] | UBS Group A G [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000135917 [Member] | BRAZIL | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000135917 [Member] | CANADA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.90% |
| C000135917 [Member] | CHINA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.10% |
| C000135917 [Member] | UNITED KINGDOM | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.80% |
| C000135917 [Member] | INDONESIA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000135917 [Member] | IRELAND | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000135917 [Member] | MEXICO | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| C000135917 [Member] | TAIWAN | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.20% |
| C000135917 [Member] | UNITED STATES | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.10% |
| C000135917 [Member] | NETHERLANDS | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000135917 [Member] | JAPAN | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| C000135917 [Member] | SWITZERLAND | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000135917 [Member] | Common Stock [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 100.70% |
| C000135917 [Member] | Liabilities in Excess of Other Assets [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (2.40%) |
| C000135917 [Member] | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000216361 [Member] | Taiwan Semiconductor Manufacturing Co Ltd [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.70% |
| C000216361 [Member] | TechnipFMC PLC [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000216361 [Member] | PDD Holdings Inc ADR [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000216361 [Member] | Monolithic Power Systems Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| C000216361 [Member] | TFI International Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000216361 [Member] | Wise PLC Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000216361 [Member] | Meituan Class B [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000216361 [Member] | Intermediate Capital Group PLC [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000216361 [Member] | Shopify Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000216361 [Member] | UBS Group A G [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000216361 [Member] | BRAZIL | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000216361 [Member] | CANADA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.90% |
| C000216361 [Member] | CHINA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.10% |
| C000216361 [Member] | UNITED KINGDOM | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.80% |
| C000216361 [Member] | INDONESIA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000216361 [Member] | IRELAND | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000216361 [Member] | MEXICO | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| C000216361 [Member] | TAIWAN | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.20% |
| C000216361 [Member] | UNITED STATES | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.10% |
| C000216361 [Member] | NETHERLANDS | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000216361 [Member] | JAPAN | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| C000216361 [Member] | SWITZERLAND | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000216361 [Member] | Common Stock [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 100.70% |
| C000216361 [Member] | Liabilities in Excess of Other Assets [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (2.40%) |
| C000216361 [Member] | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
