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Class A Class C and Investor Class [Member] Investment Strategy - Class A, Class C and Investor Class - Meridian Small Cap Growth Fund
Jun. 30, 2026
Prospectus [Line Items]  
Strategy [Heading] Principal Investment Strategies
Strategy Narrative [Text Block]
The Fund seeks long-term growth of capital by investing, under normal circumstances, at least 80% of its net assets, including the amount of any borrowings for investment purposes, in equity securities (including common stocks, preferred stocks and securities convertible into common and preferred stocks) of U.S. small capitalization companies. In the view of the Investment Adviser, small capitalization companies are defined as companies whose total market capitalization falls within the range of companies included in the Russell 2000® Growth Index or the S&P SmallCap 600® Index at the time of purchase. Both indices are broad indices of small capitalization stocks. As of September 30, 2026, the market capitalization of the companies in these indices ranged from approximately $1 million to $58 billion. The Fund may also invest up to 20% of its net assets in securities of companies of any market capitalization.
In addition, the Fund attempts to achieve its investment objective by investing, under normal circumstances, at least 80% of its net assets, including the amount of any borrowings for investment purposes, in securities of growth companies. For purposes of this 80% investment policy, a company is considered to be a growth company if it issues securities that are represented in a third-party growth-style index. The Fund may invest in companies that issue securities that are neither represented in any growth or value-style index (for example, a company that issues exclusively privately placed securities). The Fund may include such non-represented securities within the 80% test if the portfolio management team determines the company exhibits at least one growth characteristic similar to those commonly used by third-party index providers in growth classifications. Such characteristics may include, but are not limited to, historical or projected growth in earnings, revenues, sales, cash flow, book value, or other relevant financial or operating measures; valuation measures used by index providers in style classification; or other fundamental characteristics that the Adviser believes support the potential for above-average growth or capital appreciation.
The portfolio managers apply a “bottom up” fundamental research process in selecting investments. In other words, the portfolio managers analyze individual companies to determine if a company presents an attractive investment opportunity and if it is consistent with the Fund’s investment strategies and policies. The Fund generally sells investments when the Investment Adviser concludes that better investment opportunities exist in other securities, the security is fully valued, or the issuer’s circumstances or the political or economic outlook have changed.