S000010027 [Member] Investment Risks - The MidCap Growth Fund |
Oct. 31, 2025 |
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| Investment Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investment Risk: The value of your investment in this Fund may fluctuate, which means that you could lose money. The types of stocks held by the Fund may not perform as well as other types of stocks.
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| Equity Securities Risk [Member] | |
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| Risk [Text Block] | Equity Securities Risk: Common stockholders participate in company profits through dividends and stock market appreciation and, in the event of bankruptcy, distributions, on a pro‑rata basis after other claims are satisfied. Many factors affect the value of common stock, including earnings, earnings forecasts, corporate events and factors impacting the issuer’s industry and the market generally. Common stock generally has the greatest appreciation and depreciation potential of all corporate securities.
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| Quantitative Model Risk [Member] | |
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| Risk [Text Block] | Quantitative Model Risk: Securities selected using quantitative models may perform differently from the market as a whole for many reasons, including the factors used in building the model and the weights placed on each factor, among others. Results generated by such models may be impaired by errors in human judgment, data imprecision, software or other technology system malfunctions. The quantitative model used by the Adviser to manage the Fund may not perform as expected, particularly in volatile markets.
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| Management Risk [Member] | |
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| Risk [Text Block] | Management Risk: A strategy used by the Adviser may fail to produce the intended results.
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| Mid Cap and Small Cap Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Mid‑Cap and Small‑Cap Risk: Investing in securities of smaller and mid‑sized companies may be riskier than investing in larger, more established companies. Smaller and mid‑sized companies are more vulnerable to adverse developments because of more limited product lines, markets or financial resources. Also, these stocks may trade less often and in limited volume compared to larger cap stocks trading on a national securities exchange. The prices of these stocks may be more volatile than the prices of larger company stocks. As a result, the Fund’s net asset value may be subject to rapid and substantial changes.
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| Growth Investing Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Growth Investing Risk: Growth stocks are typically priced higher than other stocks, in relation to earnings and other measures, because investors believe they have more growth potential. This potential may or may not be realized and, if it is not realized, may result in a loss to the Fund. Growth stock prices also tend to be more volatile than the overall market. Because different types of stocks go out of favor with investors depending on market and economic conditions, the Fund’s return may be adversely affected during a market down turn and when growth stocks are out of favor.
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| Issuer Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Issuer Risk: The value of a security owned by the Fund may decline for a reason directly related to the issuer, such as management performance, financial leverage and reduced demand for the issuer’s goods or services.
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| Sector Concentration Risk [Member] | |
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| Risk [Text Block] | Sector Concentration Risk: Although the Fund will not concentrate in any particular industry, it may be heavily invested in a particular economic sector. If the Fund focuses on one or a few sectors, its performance is likely to be disproportionately affected by developments that significantly affect that sector, including market, economic, political or regulatory developments. Individual sectors may be more volatile and may perform differently than the broader market. The Fund’s performance may also suffer if a sector does not perform as well as the Adviser expected. Prices of securities in the same sector often change collectively regardless of the merits of individual companies.
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| Industrials Sector Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Industrials Sector Risk: Changes in government regulation, world events and economic conditions may adversely affect companies in the industrials sector. In addition, these companies are at risk for environmental and product liability damage claims. Also, commodity price volatility, changes in exchange rates, imposition of import controls, increased competition, depletion of resources, technological developments and labor relations could adversely affect the companies in this sector.
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| Information Technology Sector Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Information Technology Sector Risk: The securities of technology companies may be subject to greater price volatility than securities of companies in other sectors. Technology companies may produce or use products or services that prove commercially unsuccessful, or become obsolete, or may be adversely impacted by government regulation. Technology securities may experience significant price movements caused by disproportionate investor optimism or pessimism.
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| Consumer Discretionary Sector Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Consumer Discretionary Sector Risk: Companies engaged in the consumer discretionary sector are affected by fluctuations in supply and demand and changes in consumer preferences, social trends and marketing campaigns. Changes in consumer spending as a result of world events, political and economic conditions, commodity price volatility, changes in exchange rates, imposition of import controls, increased competition, depletion of resources and labor relations also may adversely affect these companies.
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| Health Care Sector Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Health Care Sector Risk: Factors such as extensive government regulation, restrictions on government reimbursement for medical expenses, rising costs of medical products, services and facilities, pricing pressure, an increased emphasis on outpatient services, limited number of products, industry innovation, costs associated with obtaining and protecting patents, product liability and other claims, changes in technologies and other market developments can affect companies in the health care sector.
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| Large Shareholder Purchase and Redemption Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Large Shareholder Purchase and Redemption Risk: The Fund may experience adverse effects when certain large shareholders purchase or redeem large amounts of shares of the Fund. Such large shareholder redemptions may cause the Fund to sell its securities at times when it would not otherwise do so, which may negatively impact the Fund’s net asset value and liquidity. Similarly, large purchases of the Fund’s shares may also adversely affect the Fund’s performance to the extent that the Fund is delayed in investing new cash and is required to maintain a larger cash position than it ordinarily would. In addition, a large redemption could result in the Fund’s current expenses being allocated over a smaller asset base, leading to an increase in the Fund’s expense ratio.
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| Cybersecurity Risk [Member] | |
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| Risk [Text Block] | Cybersecurity Risk: Cybersecurity breaches may allow an unauthorized party to gain access to Fund assets, customer data, or proprietary information, or cause the Fund and/or its service providers to suffer data corruption or lose operational functionality.
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| Market Risks [Member] | |
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| Risk [Text Block] | Market Risk: Certain securities and other investments held by the Fund may experience increased volatility, illiquidity, or other potentially adverse effects in response to changing market conditions, inflation, changes in interest rates, lack of liquidity in the bond or equity markets, volatility in the equity markets, market disruptions caused by local or regional events such as financial institution failures, war, acts of terrorism, the spread of infectious illness (including epidemics and pandemics) or other public health issues, recessions or other events or adverse investor sentiment. Additionally, the imposition of tariffs or trade restrictions can disrupt global supply chains, increase costs for certain industries, and contribute to heightened market volatility, which may adversely affect the Fund’s investments. There is also a risk that a particular style of investing, such as growth, may underperform other styles of investing or the market generally.
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| Risk Lose Money [Member] | |
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| Risk [Text Block] | As with any mutual fund, it is possible to lose money on an investment in the Fund. |
| Risk Not Insured Depository Institution [Member] | |
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| Risk [Text Block] | An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any government agency. |