Fees and Expenses |
Jul. 03, 2026 |
|---|---|
| Boston Partners All-Cap Value Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Expenses and Fees |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may be required to pay commissions and/or other forms of compensation to a broker for transactions in shares of the Fund, which are not reflected in the tables or the examples below. |
| Other Expenses, New Fund, Based on Estimates [Text] | “Other Expenses” are estimated for R6 Class shares for the current fiscal year. |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | 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 $100,000 in Institutional Class shares, $10,000 in Investor Class, or $1,000,000 in R6 Class shares of the Fund for the time periods indicated and that you hold or sell all of your shares at the end of the period. The Example also assumes that your investment has a 5% return each year and that the operating expenses of the Fund remain the same (taking into account the contractual expense limitation until its expiration). Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | 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 Total annual Fund operating expenses or in the Example, affect the Fund’s performance. During the fiscal year ended August 31, 2025, the portfolio turnover rate for the Fund was 37% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 37.00% |
| Boston Partners Global Equity Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Expenses and Fees |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell Institutional Class shares of the Fund. You may be required to pay commissions and/or other forms of compensation to a broker for transactions in Institutional Class shares of the Fund, which are not reflected in the tables or the examples below. |
| Other Expenses, New Fund, Based on Estimates [Text] | “Other Expenses” are estimated for R6 Class shares for the current fiscal year. |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | 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 Total annual Fund operating expenses or in the Example, affect the Fund’s performance. During the fiscal year ended August 31, 2025, the portfolio turnover rate for the Fund was 55% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 55.00% |
| Boston Partners Long/Short Equity Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Expenses and Fees |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may be required to pay commissions and/or other forms of compensation to a broker for transactions in shares of the Fund, which are not reflected in the tables or the examples below. |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | 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 $100,000 in Institutional Class shares or $10,000 in Investor Class shares of the Fund for the time periods indicated and that you hold or sell all of your shares at the end of the period. The Example also assumes that your investment has a 5% return each year and that the operating expenses of the Fund remain the same (taking into account the contractual expense limitation until its expiration). Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | 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 Total annual Fund operating expenses or in the Example, affect the Fund’s performance. During the fiscal year ended August 31, 2025, the portfolio turnover rate for the Fund was 54% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 54.00% |
| Boston Partners Long/Short Research Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Expenses and Fees |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may be required to pay commissions and/or other forms of compensation to a broker for transactions in shares of the Fund, which are not reflected in the tables or the examples below. |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | 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 $100,000 in Institutional Class shares or $10,000 in Investor Class shares of the Fund for the time periods indicated and that you hold or sell all of your shares at the end of the period. The Example also assumes that your investment has a 5% return each year and that the operating expenses of the Fund remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | 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 Total annual Fund operating expenses or in the Example, affect the Fund’s performance. During the fiscal year ended August 31, 2025, the portfolio turnover rate for the Fund was 65% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 65.00% |
| Boston Partners Small Cap Value Fund II | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Expenses and Fees |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may be required to pay commissions and/or other forms of compensation to a broker for transactions in shares of the Fund, which are not reflected in the tables or the examples below. |
| Other Expenses, New Fund, Based on Estimates [Text] | “Other Expenses” are estimated for R6 Class shares for the current fiscal year. |
| Acquired Fund Fees and Expenses, Based on Estimates [Text] | Acquired Fund Fees and Expenses (“AFFE”) are indirect fees and expenses that the Fund incurs from investing in the shares of other mutual funds, including money market funds and exchange traded funds, and are estimated for the current fiscal year. Please note that the amount of Total Annual Fund Operating Expenses and Total Annual Fund Operating Expenses after Fee Waiver/Expense Reimbursements shown in the above table will differ from the “Financial Highlights” section of the Prospectus, which reflects the operating expenses of the Fund and does not include indirect expenses such as AFFE. |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | 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 $100,000 in Institutional Class shares, $10,000 in Investor Class shares, or $1,000,000 in R6 Class shares of the Fund for the time periods indicated and that you hold or sell all of your shares at the end of the period. The Example also assumes that your investment has a 5% return each year and that the operating expenses of the Fund remain the same (taking into account the contractual expense limitation until its expiration). Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | 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 Total annual Fund operating expenses or in the Example, affect the Fund’s performance. During the fiscal year ended August 31, 2025, the portfolio turnover rate for the Fund was 70% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 70.00% |
| WPG Partners Select Small Cap Value Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Expenses and Fees |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell Institutional Class shares of the Fund. You may be required to pay commissions and/or other forms of compensation to a broker for transactions in Institutional Class shares of the Fund, which are not reflected in the tables or the examples below. |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | 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 $100,000 in the Fund for the time periods indicated and that you hold or sell all of your shares at the end of the period. The Example also assumes that your investment has a 5% return each year and that the operating expenses of the Fund remain the same (taking into account the contractual expense limitation until its expiration). Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | 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 Total annual Fund operating expenses or in the Example, affect the Fund’s performance. During the fiscal year ended August 31, 2025, the portfolio turnover rate for the Fund was 155% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 155.00% |
| WPG Partners Small Cap Value Diversified Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Expenses and Fees |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell Institutional Class shares of the Fund. You may be required to pay commissions and/or other forms of compensation to a broker for transactions in Institutional Class shares of the Fund, which are not reflected in the tables or the examples below. |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | 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 $100,000 in the Fund for the time periods indicated and that you hold or sell all of your shares at the end of the period. The Example also assumes that your investment has a 5% return each year and that the operating expenses of the Fund remain the same (taking into account the contractual expense limitation until its expiration). Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | 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 Total annual Fund operating expenses or in the Example, affect the Fund’s performance. During the fiscal year ended August 31, 2025, the portfolio turnover rate for the Fund was 92% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 92.00% |