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  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="USD">471</rr:ExpenseExampleYear05>
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  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="USD">771</rr:ExpenseExampleYear05>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">0.479</rr:AnnualReturn2003>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">0.3471</rr:AnnualReturn2003>
  <rr:RiskReturnHeading contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="4"&gt;&lt;center&gt;&lt;b&gt;FUND SUMMARY &lt;/b&gt;&lt;/center&gt;&lt;/font&gt;&lt;font style="font-family:Times New Roman" size="3"&gt;&lt;b&gt;&lt;a name="toc426611_3"&gt;&lt;/a&gt;M&lt;small&gt;ERIDIAN&lt;/small&gt; E&lt;small&gt;QUITY&lt;/small&gt; I&lt;small&gt;NCOME&lt;/small&gt; F&lt;small&gt;UND&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;sup style="vertical-align:baseline; position:relative; bottom:.8ex"&gt;&amp;#174;&lt;/sup&gt;&lt;/font&gt;&lt;/small&gt; &lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
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  <rr:RiskReturnHeading contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="4"&gt;&lt;center&gt;&lt;b&gt;FUND SUMMARY &lt;/b&gt;&lt;/center&gt;&lt;/font&gt;&lt;font style="font-family:Times New Roman" size="3"&gt;&lt;b&gt;&lt;a name="toc426611_3"&gt;&lt;/a&gt;M&lt;small&gt;ERIDIAN&lt;/small&gt; G&lt;small&gt;ROWTH&lt;/small&gt; F&lt;small&gt;UND&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;sup style="vertical-align:baseline; position:relative; bottom:.8ex"&gt;&amp;#174;&lt;/sup&gt;&lt;/font&gt;&lt;/small&gt; &lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:RiskReturnHeading contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;center&gt;&lt;font style="font-family:Times New Roman" size="4"&gt;&lt;b&gt;FUND SUMMARY &lt;/b&gt;&lt;/font&gt;&lt;/center&gt;&lt;font style="font-family:Times New Roman" size="3"&gt;&lt;b&gt;&lt;a name="toc426611_3"&gt;&lt;/a&gt;M&lt;small&gt;ERIDIAN&lt;/small&gt; V&lt;small&gt;ALUE&lt;/small&gt; F&lt;small&gt;UND&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;sup style="vertical-align:baseline; position:relative; bottom:.8ex"&gt;&amp;reg;&lt;/sup&gt;&lt;/font&gt;&lt;/small&gt;&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
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  <rr:PortfolioTurnoverTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#147;turns over&amp;#148; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when the Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund&amp;#146;s performance. During the most recent fiscal year, the Fund&amp;#146;s portfolio turnover rate was 31% of the average value of its portfolio. &lt;/font&gt;</rr:PortfolioTurnoverTextBlock>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#147;turns over&amp;#148; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when the Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund&amp;#146;s performance. During the most recent fiscal year, the Fund&amp;#146;s portfolio turnover rate was 20% of the average value of its portfolio. &lt;/font&gt;</rr:PortfolioTurnoverTextBlock>
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  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;www.meridianfund.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">0.1382</rr:BarChartYearToDateReturn>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="pure">0.0851</rr:BarChartYearToDateReturn>
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  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. &lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. &lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Shareholder Fees&lt;br/&gt;(fees paid directly from your investment)&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
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  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="USD">87</rr:ExpenseExampleYear01>
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  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="USD">116</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="USD">144</rr:ExpenseExampleYear01>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;The bar chart and table below show the Fund&amp;#146;s historical performance and provide an indication of the risks of investing in the Fund. The bar chart shows changes in the Fund&amp;#146;s performance from year-to-year. The table shows how the Fund&amp;#146;s average annual returns compare with those of the Russell 2000&lt;font style="font-family:Times New Roman" size="1"&gt;&lt;sup style="vertical-align:baseline; position:relative; bottom:.8ex"&gt;&amp;reg;&lt;/sup&gt;&lt;/font&gt; Index.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:BarChartClosingTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;During the period covered by this bar chart, the Fund&amp;#146;s highest quarterly return was 20.96% (for the quarter ended June 30, 2003); and the lowest quarterly return was &amp;#150;20.24% (for the quarter ended December 31, 2008). &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;For the period January 1, 2012 through September 30, 2012, the total return of the Fund was 10.62%. &lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;The bar chart and table below show the Fund&amp;#146;s historical performance and provide an indication of the risks of investing in the Fund. The bar chart shows changes in the Fund&amp;#146;s performance from year-to-year. The table shows how the Fund&amp;#146;s average annual returns compare with those of the S&amp;amp;P 500&lt;font style="font-family:Times New Roman" size="1"&gt;&lt;sup style="vertical-align:baseline; position:relative; bottom:.8ex"&gt;&amp;reg;&lt;/sup&gt;&lt;/font&gt; Index.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;The bar chart and table below show the Fund&amp;#146;s historical performance and provide an indication of the risks of investing in the Fund. The bar chart shows changes in the Fund&amp;#146;s performance from year-to-year. The table shows how the Fund&amp;#146;s average annual returns compare with those of the S&amp;amp;P 500&lt;/font&gt;&lt;font style="font-family:Times New Roman" size="1"&gt;&lt;sup style="vertical-align:baseline; position:relative; bottom:.8ex"&gt;&amp;reg;&lt;/sup&gt;&lt;/font&gt; &lt;font style="font-family:Times New Roman" size="2"&gt; index.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:BarChartClosingTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;During the period covered by this bar chart, the Fund&amp;#146;s highest quarterly return was 16.07% (for the quarter ended September 30, 2009); and the lowest quarterly return was &amp;#150;23.48% (for the quarter ended December 31, 2008).&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;For the period January 1, 2012 through September 30, 2012, the total return of the Fund was 13.82%.&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member">1984-08-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributions_MemberS000001462_MemberC000003882_Member">1984-08-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate id="Item_2" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributionsAndSales_MemberS000001462_MemberC000003882_Member">1984-08-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberRussellTwoThousandIndex_Member">1984-08-01</rr:AverageAnnualReturnInceptionDate>
  <rr:BarChartClosingTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;During the period covered by this bar chart, the Fund&amp;#146;s highest quarterly return was 20.06% (for the quarter ended September 30, 2009); and the lowest quarterly return was &amp;#150;21.28% (for the quarter ended December 31, 2008). &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;For the period January 1, 2012 through September 30, 2012, the total return of the Fund was 8.51%. &lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member">2005-01-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributions_MemberS000001461_MemberC000003881_Member">2005-01-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributionsAndSales_MemberS000001461_MemberC000003881_Member">2005-01-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberSAndPFiveHundredIndex_Member">2005-01-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member">1994-02-10</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributions_MemberS000001463_MemberC000003883_Member">1994-02-10</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate id="Item_3" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributionsAndSales_MemberS000001463_MemberC000003883_Member">1994-02-10</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberSAndPFiveHundredIndex_Member">1994-02-10</rr:AverageAnnualReturnInceptionDate>
  <dei:DocumentType contextRef="Duration_02Nov2011_01Nov2012">485BPOS</dei:DocumentType>
  <dei:DocumentPeriodEndDate contextRef="Duration_02Nov2011_01Nov2012">2012-06-30</dei:DocumentPeriodEndDate>
  <dei:EntityRegistrantName contextRef="Duration_02Nov2011_01Nov2012">MERIDIAN FUND INC</dei:EntityRegistrantName>
  <dei:DocumentCreationDate contextRef="Duration_02Nov2011_01Nov2012">2012-10-26</dei:DocumentCreationDate>
  <rr:ObjectiveHeading contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="font-family:Times New Roman" size="3"&gt;&lt;b&gt;Investment Objective&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectiveHeading contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="3"&gt;&lt;b&gt;Investment Objective &lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectiveHeading contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="3"&gt;&lt;b&gt;Investment Objective&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:MaximumDeferredSalesChargeOverOfferingPrice decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOfferingPrice decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOfferingPrice>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">0.0085</rr:ExpensesOverAssets>
  <rr:MaximumDeferredSalesChargeOverOfferingPrice decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOfferingPrice>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">0.0114</rr:ExpensesOverAssets>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;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 $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund&amp;#146;s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: &lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="USD">271</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;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 $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund&amp;#146;s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: &lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="3"&gt;&lt;b&gt;Principal Investment Strategies&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;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 $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund&amp;#146;s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: &lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="USD">362</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="USD">446</rr:ExpenseExampleYear03>
  <rr:StrategyHeading contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Principal Investment Strategies&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyHeading contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Principal Investment Strategies&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:RiskLoseMoney contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;You could lose money on your investment in the Fund or the Fund could underperform other investments.&lt;/font&gt;</rr:RiskLoseMoney>
  <rr:RiskLoseMoney contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;You could lose money on your investment in the Fund or the Fund could underperform other investments.&lt;/font&gt;</rr:RiskLoseMoney>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;1-800-446-6662&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">-0.1782</rr:AnnualReturn2002>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">0.0107</rr:AnnualReturn2011>
  <rr:RiskLoseMoney contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;You could lose money on your investment in the Fund or the Fund could underperform other investments.&lt;/font&gt;</rr:RiskLoseMoney>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member">2003-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">0.2096</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;1-800-446-6662&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;1-800-446-6662&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceTableHeading contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;center&gt;&lt;b&gt;Average Annual Total Returns (For the periods ended December&amp;nbsp;31, 2011)&lt;/b&gt;&lt;/center&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;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 Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts. &lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;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 Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;/font&gt;</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="pure">0.0564</rr:AnnualReturn2011>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member">2009-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">0.1607</rr:BarChartHighestQuarterlyReturn>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">0.0793</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributions_MemberS000001462_MemberC000003882_Member" unitRef="pure">0.0726</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 id="Item_4" decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributionsAndSales_MemberS000001462_MemberC000003882_Member" unitRef="pure">0.0683</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberRussellTwoThousandIndex_Member" unitRef="pure">0.0562</rr:AverageAnnualReturnYear10>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:PerformanceTableHeading contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;center&gt;&lt;b&gt;Average Annual Total Returns&lt;br/&gt; (For the periods ended December 31, 2011)&lt;/b&gt;&lt;/center&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">-0.1336</rr:AnnualReturn2002>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">-0.0239</rr:AnnualReturn2011>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member">2009-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="pure">0.2006</rr:BarChartHighestQuarterlyReturn>
  <rr:PerformanceTableHeading contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;center&gt;&lt;b&gt;Average Annual Total Returns&lt;br/&gt; (For the periods ended December 31, 2011)&lt;/b&gt;&lt;/center&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;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 Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;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 Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts. &lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;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 Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.&lt;/font&gt;</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;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 Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts. &lt;/font&gt;</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">0.0536</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributions_MemberS000001463_MemberC000003883_Member" unitRef="pure">0.0425</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 id="Item_5" decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributionsAndSales_MemberS000001463_MemberC000003883_Member" unitRef="pure">0.0449</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberSAndPFiveHundredIndex_Member" unitRef="pure">0.0292</rr:AverageAnnualReturnYear10>
  <rr:BarChartTableTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;div style="display:none"&gt;~ http://www.meridianfund.com/role/ScheduleAnnualTotalReturnsMERIDIANVALUEFUNDBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;div style="display:none"&gt;~ http://www.meridianfund.com/role/ScheduleAnnualTotalReturnsMERIDIANGROWTHFUNDBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;div style="display:none"&gt;~ http://www.meridianfund.com/role/ScheduleAnnualTotalReturnsMERIDIANEQUITYINCOMEFUNDBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <dei:EntityCentralIndexKey contextRef="Duration_02Nov2011_01Nov2012">0000745467</dei:EntityCentralIndexKey>
  <dei:AmendmentFlag contextRef="Duration_02Nov2011_01Nov2012">false</dei:AmendmentFlag>
  <dei:DocumentEffectiveDate contextRef="Duration_02Nov2011_01Nov2012">2012-11-01</dei:DocumentEffectiveDate>
  <rr:ProspectusDate contextRef="Duration_02Nov2011_01Nov2012">2012-11-01</rr:ProspectusDate>
  <rr:ExpenseHeading contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="font-family:Times New Roman" size="3"&gt;&lt;b&gt;Fees and Expenses of the Fund&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseHeading contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="3"&gt;&lt;b&gt;Fees and Expenses of the Fund &lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseHeading contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="3"&gt;&lt;b&gt;Fees and Expenses of the Fund &lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;The M&lt;small&gt;ERIDIAN&lt;/small&gt; V&lt;small&gt;ALUE&lt;/small&gt; F&lt;small&gt;UND&lt;font style="font-family:Times New Roman" size="1"&gt;&lt;sup style="vertical-align:baseline; position:relative; bottom:.8ex"&gt;&amp;reg;&lt;/sup&gt;&lt;/font&gt;&lt;/small&gt; seeks long-term growth of capital. &lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;The M&lt;small&gt;ERIDIAN&lt;/small&gt; E&lt;small&gt;QUITY&lt;/small&gt; I&lt;small&gt;NCOME&lt;/small&gt; F&lt;small&gt;UND&lt;font style="font-family:Times New Roman" size="1"&gt;&lt;sup style="vertical-align:baseline; position:relative; bottom:.8ex"&gt;&amp;reg;&lt;/sup&gt;&lt;/font&gt;&lt;/small&gt; seeks long-term growth of capital along with income as a component of total return. &lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;The M&lt;small&gt;ERIDIAN&lt;/small&gt; G&lt;small&gt;ROWTH&lt;/small&gt; F&lt;small&gt;UND&lt;font style="font-family:Times New Roman" size="1"&gt;&lt;sup style="vertical-align:baseline; position:relative; bottom:.8ex"&gt;&amp;reg;&lt;/sup&gt;&lt;/font&gt;&lt;/small&gt; seeks long-term growth of capital. &lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">0.0076</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">0.0009</rr:OtherExpensesOverAssets>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">0.01</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">0.0014</rr:OtherExpensesOverAssets>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="USD">1049</rr:ExpenseExampleYear10>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="pure">0.0092</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:PortfolioTurnoverHeading contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="3"&gt;&lt;b&gt;Portfolio Turnover&lt;/b&gt;&lt;/font&gt;</rr:PortfolioTurnoverHeading>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="pure">0.0049</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="pure">0.0141</rr:ExpensesOverAssets>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;The Fund seeks long-term growth of capital by investing primarily in a diversified portfolio of publicly traded common stocks of U.S. companies. Under normal circumstances, the Fund emphasizes growth companies that the Investment Adviser believes may have prospects for above-average growth in revenues and earnings because of many factors, including high sales growth, high unit growth, industry growth, high or improving returns on assets and equity and a strong balance sheet. The Fund may invest in securities of companies with any capitalization across a broad range of industries. These may include companies that are relatively small in terms of total assets, revenues and earnings. The mix of the Fund&amp;#146;s investments at any time will depend on the industries and types of securities the Investment Adviser believes hold the most potential for achieving the Fund&amp;#146;s investment objective. The Fund may invest up to 25% of its total assets, calculated at the time of purchase, in securities of foreign companies, including emerging market companies. 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&amp;#146;s circumstances or the political or economic outlook have changed. &lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="3"&gt;&lt;b&gt;Principal Investment Risks&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="USD">1386</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="USD">1691</rr:ExpenseExampleYear10>
  <rr:PortfolioTurnoverHeading contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Portfolio Turnover&lt;/b&gt;&lt;/font&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverHeading contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Portfolio Turnover&lt;/b&gt;&lt;/font</rr:PortfolioTurnoverHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;The Fund seeks long-term growth of capital by investing primarily in a diversified portfolio of publicly traded common stocks of U.S. companies. Under normal circumstances, the Fund emphasizes stocks which the Investment Adviser believes are undervalued in relation to an issuer&amp;#146;s long-term earnings power or asset value, or the stock market in general. Securities in which the Fund invests may be undervalued because of many factors, including market decline, poor economic conditions, tax-loss selling or actual or anticipated unfavorable developments affecting the issuer of the security. The Fund may invest in securities of companies with any capitalization across a broad range of industries. The Fund intends to invest at least 65% of its total assets in common stocks and equity-related securities (such as convertible debt securities and warrants). The Fund may invest up to 35% of its total assets in debt or fixed income securities, including higher yield, higher risk, lower rated or unrated corporate bonds commonly referred to as &amp;#147;junk bonds.&amp;#148; These are bonds that are rated Ba or below by Moody&amp;#146;s or BB or below by S&amp;amp;P. The Fund may invest up to 10% of its total assets in securities rated Ca or below by Moody&amp;#146;s or C or below by S&amp;amp;P, or unrated but considered by the Investment Adviser to be of comparable quality. The Fund may also invest up to 25% of its total assets, calculated at the time of purchase, in securities of foreign companies, including emerging market companies. If, in the Investment Adviser&amp;#146;s opinion, a stock has reached a fully valued position, it generally will be, but need not be, sold and replaced by securities which are deemed to be undervalued in the marketplace. The Fund generally sells investments when (i) the Investment Adviser concludes that the company&amp;#146;s fundamentals are not meeting expectations; (ii) better investment opportunities exist; and/or (iii) the company&amp;#146;s business has improved and this, in the Investment Adviser&amp;#146;s opinion, is reflected in the share price.&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;The Fund seeks to maximize total return by investing primarily in a diversified portfolio of dividend-paying equity securities of U.S. companies that have the potential for capital appreciation and which the Investment Adviser believes may have the capacity to raise dividends in the future. Under normal circumstances, the Fund will invest at least 80% of its net assets in equity securities. Equity securities include common and preferred stocks as well as convertible securities in domestic and foreign companies. The Fund may invest in securities of companies with any capitalization across a broad range of industries. These may include companies that are relatively small in terms of assets, revenues and earnings. The mix of the Fund&amp;#146;s investments at any time will depend on the industries and types of securities the Investment Adviser believes hold the most potential for achieving the Fund&amp;#146;s investment objective. The Fund may invest up to 25% of its total assets, calculated at the time of purchase, in securities of foreign companies, including emerging market companies. The Fund may also invest its assets in debt or fixed income securities including higher yield, higher risk, lower rated or unrated corporate bonds commonly referred to as &amp;#147;junk bonds.&amp;#148; These are bonds that are rated Ba or below by Moody&amp;#146;s Investors Service, Inc. (&amp;#147;Moody&amp;#146;s&amp;#148;) or BB or below by Standard and Poor&amp;#146;s Ratings Services (&amp;#147;S&amp;amp;P&amp;#148;) or are in default or unrated but of comparable quality as determined by the Investment Adviser. The Fund generally sells investments when the Investment Adviser concludes that the long-term growth or dividend prospects of the company have deteriorated, or the issuer&amp;#146;s circumstances or the political or economic outlook relative to the security have changed, and better investment opportunities exist in other securities.&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Principal Investment Risks&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;There are risks involved with any investment. The principal risks associated with an investment in this Fund are set forth below. Please see the section &amp;#147;Further Information About Principal Risks&amp;#148; in this Prospectus for a detailed discussion of these risks and other factors you should carefully consider before deciding to invest in the Fund. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;General Risk&lt;/b&gt; &amp;#151; You could lose money on your investment in the Fund or the Fund could underperform other investments. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Investment Style Risk&lt;/b&gt; &amp;#151; Although the Fund makes every effort to achieve its investment objective of long-term growth of capital, it cannot guarantee that the Investment Adviser&amp;#146;s investment strategies or securities selection method will achieve that objective. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Equity Securities Risk&lt;/b&gt; &amp;#151; Equity securities holders are entitled to the income and increase in the value of the assets and business of an issuer after debt obligations and obligations to debt securities holders are satisfied. Equity securities fluctuate in price in response to many factors including historical and prospective earnings of the issuer, the value of its assets, general economic conditions, interest rates, investors perceptions and market liquidity. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Market Risk&lt;/b&gt; &amp;#151; The value of the Fund&amp;#146;s investments will fluctuate in response to the activities of individual companies and general stock market and economic conditions and the value of your investment in the Fund may be more or less than your purchase price. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Growth Investing Risk&lt;/b&gt; &amp;#151; There is a risk that the Fund&amp;#146;s emphasis on investing in growth-oriented companies may underperform during times when growth investing is out of favor. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Small Company Risk&lt;/b&gt; &amp;#151; Generally, the smaller the capitalization of a company, the greater the risk associated with an investment in the company. The stock prices of smaller and newer companies tend to fluctuate more than those of larger, more established companies and have smaller market for their shares than do large capitalization companies. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Foreign Company Risk&lt;/b&gt; &amp;#151; Investments in foreign securities may be subject to more risks than those associated with U.S. investments, including currency fluctuations, political and economic instability and differences in accounting, auditing and financial reporting standards. Emerging market securities involve greater risk and more volatility than those of companies in more developed markets. Significant levels of foreign taxes are also a risk related to foreign investments. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. &lt;/b&gt;&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. &lt;/b&gt;&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="3"&gt;&lt;b&gt;Performance&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;The bar chart and table below show the Fund&amp;#146;s historical performance and provide an indication of the risks of investing in the Fund. The bar chart shows changes in the Fund&amp;#146;s performance from year-to-year. The table shows how the Fund&amp;#146;s average annual returns compare with those of the Russell 2000&lt;font style="font-family:Times New Roman" size="1"&gt;&lt;sup style="vertical-align:baseline; position:relative; bottom:.8ex"&gt;&amp;reg;&lt;/sup&gt;&lt;/font&gt; Index. The Fund&amp;#146;s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. Updated performance information for the Fund may be obtained by visiting www.meridianfund.com or by calling 1-800-446-6662. &lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:RiskNarrativeTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;There are risks involved with any investment. The principal risks associated with an investment in this Fund are set forth below. Please see the section &amp;#147;Further Information About Principal Risks&amp;#148; in this Prospectus for a detailed discussion of these risks and other factors you should carefully consider before deciding to invest in the Fund. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;General Risk&lt;/b&gt; &amp;#151; You could lose money on your investment in the Fund or the Fund could underperform other investments. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Investment Style Risk&lt;/b&gt; &amp;#151; Although the Fund makes every effort to achieve its investment objective of long-term growth of capital, it cannot guarantee that the Investment Adviser&amp;#146;s investment strategies or securities selection method will achieve that objective. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Equity Securities Risk&lt;/b&gt; &amp;#151; Equity securities holders are entitled to the income and increase in the value of the assets and business of an issuer after debt obligations and obligations to debt securities holders are satisfied. Equity securities fluctuate in price in response to many factors including historical and prospective earnings of the issuer, the value of its assets, general economic conditions, interest rates, investors perceptions and market liquidity. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Market Risk&lt;/b&gt; &amp;#151; The value of the Fund&amp;#146;s investments will fluctuate in response to the activities of individual companies and general stock market and economic conditions and the value of your investment in the Fund may be more or less than your purchase price. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Value Investing Risk&lt;/b&gt; &amp;#151; There is a risk that the Fund&amp;#146;s emphasis on investing in value-oriented companies may underperform during times when value investing is out of favor. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Small Company Risk&lt;/b&gt; &amp;#151; Generally, the smaller the capitalization of a company, the greater the risk associated with an investment in the company. The stock prices of smaller and newer companies tend to fluctuate more than those of larger, more established companies and have smaller market for their shares than do large capitalization companies. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Foreign Company Risk&lt;/b&gt; &amp;#151; Investments in foreign securities may be subject to more risks than those associated with U.S. investments, including currency fluctuations, political and economic instability and differences in accounting, auditing and financial reporting standards. Emerging market securities involve greater risk and more volatility than those of companies in more developed markets. Significant levels of foreign taxes are also a risk related to foreign investments. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;High Yield Bond Risk&lt;/b&gt; &amp;#151; Debt securities that are rated below investment grade (commonly referred to as &amp;#147;junk bonds&amp;#148;) involve a greater risk of default or price declines than investment grade securities. The market for high-yield, lower rated securities may be thinner and less active, causing market price volatility and limited liquidity in the secondary market. This may limit the ability of a Fund to sell these securities at their fair market values either to meet redemption requests, or in response to changes in the economy or the financial markets. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Debt Securities Risk&lt;/b&gt; &amp;#151; Debt securities are subject to credit risk, interest rate risk and liquidity risk. Credit risk is the risk that the entity that issued a debt security may become unable to make payments of principal and interest when due and includes the risk of default. Interest rate risk is the risk of losses due to changes in interest rates. Liquidity risk is the risk that the Fund may not be able to sell portfolio securities, including medium- and lower-grade securities, because there are too few buyers for them.  &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. &lt;/b&gt;&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;The Fund&amp;#146;s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.&lt;/b&gt;&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:RiskNarrativeTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;There are risks involved with any investment. The principal risks associated with an investment in this Fund are set forth below. Please see the section &amp;#147;Further Information About Principal Risks&amp;#148; in this Prospectus for a detailed discussion of these risks and other factors you should carefully consider before deciding to invest in the Fund. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;General Risk&lt;/b&gt; &amp;#151; You could lose money on your investment in the Fund or the Fund could underperform other investments. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Investment Style Risk&lt;/b&gt; &amp;#151; Although the Fund makes every effort to achieve its investment objective of long-term growth of capital along with income, it cannot guarantee that the Investment Adviser&amp;#146;s investment strategies or securities selection method will achieve that objective. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Equity Securities Risk&lt;/b&gt; &amp;#151; Equity securities holders are entitled to the income and increase in the value of the assets and business of an issuer after debt obligations and obligations to debt securities holders are satisfied. Equity securities fluctuate in price in response to many factors including historical and prospective earnings of the issuer, the value of its assets, general economic conditions, interest rates, investors perceptions and market liquidity. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Market Risk&lt;/b&gt; &amp;#151; The value of the Fund&amp;#146;s investments will fluctuate in response to the activities of individual companies and general stock market and economic conditions and the value of your investment in the Fund may be more or less than your purchase price. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Income Risk&lt;/b&gt; &amp;#151; Because the payment of dividends is subject to the discretion of a company, there is a risk that the Fund may not be able to pay income. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Small Company Risk&lt;/b&gt; &amp;#151; Generally, the smaller the capitalization of a company, the greater the risk associated with an investment in the company. The stock prices of smaller and newer companies tend to fluctuate more than those of larger, more established companies and have smaller market for their shares than do large capitalization companies. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Foreign Company Risk&lt;/b&gt; &amp;#151; Investments in foreign securities may be subject to more risks than those associated with U.S. investments, including currency fluctuations, political and economic instability and differences in accounting, auditing and financial reporting standards. Emerging market securities involve greater risk and more volatility than those of companies in more developed markets. Significant levels of foreign taxes are also a risk related to foreign investments. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;High Yield Bond Risk&lt;/b&gt; &amp;#151; Debt securities that are rated below investment grade (commonly referred to as &amp;#147;junk bonds&amp;#148;) involve a greater risk of default or price declines than investment grade securities. The market for high-yield, lower rated securities may be thinner and less active, causing market price volatility and limited liquidity in the secondary market. This may limit the ability of a Fund to sell these securities at their fair market values either to meet redemption requests, or in response to changes in the economy or the financial markets. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Debt Securities Risk&lt;/b&gt; &amp;#151; Debt securities are subject to credit risk, interest rate risk and liquidity risk. Credit risk is the risk that the entity that issued a debt security may become unable to make payments of principal and interest when due and includes the risk of default. Interest rate risk is the risk of losses due to changes in interest rates. Liquidity risk is the risk that the Fund may not be able to sell portfolio securities, including medium- and lower-grade securities, because there are too few buyers for them.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. &lt;/b&gt;&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">0.1447</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">0.0033</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">0.1581</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">0.054</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">-0.3035</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">0.3617</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">0.3137</rr:AnnualReturn2010>
  <rr:RiskHeading contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Principal Investment Risks&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. &lt;/b&gt;&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Performance&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Performance&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;The bar chart and table below show the Fund&amp;#146;s historical performance and provide an indication of the risks of investing in the Fund. The bar chart shows changes in the Fund&amp;#146;s performance from year-to-year. The table shows how the Fund&amp;#146;s average annual returns compare with those of the S&amp;amp;P 500&lt;font style="font-family:Times New Roman" size="1"&gt;&lt;sup style="vertical-align:baseline; position:relative; bottom:.8ex"&gt;&amp;reg;&lt;/sup&gt;&lt;/font&gt; Index. The Fund&amp;#146;s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. Updated performance information for the Fund may be obtained by visiting www.meridianfund.com or by calling 1-800-446-6662. &lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:YearToDateReturnLabel contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;total return of the Fund&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;The bar chart and table below show the Fund&amp;#146;s historical performance and provide an indication of the risks of investing in the Fund. The bar chart shows changes in the Fund&amp;#146;s performance from year-to-year. The table shows how the Fund&amp;#146;s average annual returns compare with those of the S&amp;amp;P 500&lt;font style="font-family:Times New Roman" size="1"&gt;&lt;sup style="vertical-align:baseline; position:relative; bottom:.8ex"&gt;&amp;reg;&lt;/sup&gt;&lt;/font&gt; Index. The Fund&amp;#146;s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. Updated performance information for the Fund may be obtained by visiting www.meridianfund.com or by calling 1-800-446-6662.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">-0.2024</rr:BarChartLowestQuarterlyReturn>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;The Fund&amp;#146;s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;The Fund&amp;#146;s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:BarChartHeading contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;center&gt;&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;b&gt;Year-by-Year Total Returns as of 12/31&lt;/b&gt;&lt;/font&gt;&lt;/center&gt;</rr:BarChartHeading>
  <rr:BarChartHeading contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;center&gt;&lt;b&gt;Year-by-Year Total Returns as of 12/31 &lt;/b&gt;&lt;/center&gt;&lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartHeading contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;&lt;center&gt;&lt;b&gt;Year-by-Year Total Returns as of 12/31 &lt;/b&gt;&lt;/center&gt;&lt;/font&gt;</rr:BarChartHeading>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;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.&lt;/font&gt;</rr:PerformanceTableUsesHighestFederalRate>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="pure">0.1956</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="pure">-0.005</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="pure">-0.301</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="pure">0.223</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="pure">0.1663</rr:AnnualReturn2010>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">0.0107</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributions_MemberS000001462_MemberC000003882_Member" unitRef="pure">-0.0009</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 id="Item_6" decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributionsAndSales_MemberS000001462_MemberC000003882_Member" unitRef="pure">0.0217</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberRussellTwoThousandIndex_Member" unitRef="pure">-0.0418</rr:AverageAnnualReturnYear01>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">0.0582</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributions_MemberS000001462_MemberC000003882_Member" unitRef="pure">0.0511</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 id="Item_7" decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributionsAndSales_MemberS000001462_MemberC000003882_Member" unitRef="pure">0.0488</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberRussellTwoThousandIndex_Member" unitRef="pure">0.0015</rr:AverageAnnualReturnYear05>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">-0.2348</rr:BarChartLowestQuarterlyReturn>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">0.1245</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributions_MemberS000001462_MemberC000003882_Member" unitRef="pure">0.1019</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception id="Item_8" decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributionsAndSales_MemberS000001462_MemberC000003882_Member" unitRef="pure">0.099</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberRussellTwoThousandIndex_Member" unitRef="pure">0.0947</rr:AverageAnnualReturnSinceInception>
  <rr:YearToDateReturnLabel contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;total return of the Fund&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">0.151</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">0.0292</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">0.1867</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">0.0776</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">-0.3195</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">0.2139</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">0.1823</rr:AnnualReturn2010>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="pure">-0.2128</rr:BarChartLowestQuarterlyReturn>
  <rr:YearToDateReturnLabel contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;total return of the Fund&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;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.&lt;/font&gt;</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;font style="font-family:Times New Roman" size="2"&gt;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.&lt;/font&gt;</rr:PerformanceTableUsesHighestFederalRate>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">-0.0239</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributions_MemberS000001463_MemberC000003883_Member" unitRef="pure">-0.0246</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 id="Item_9" decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributionsAndSales_MemberS000001463_MemberC000003883_Member" unitRef="pure">-0.0147</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberSAndPFiveHundredIndex_Member" unitRef="pure">0.0211</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">0.0054</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributions_MemberS000001463_MemberC000003883_Member" unitRef="pure">-0.0035</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 id="Item_10" decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributionsAndSales_MemberS000001463_MemberC000003883_Member" unitRef="pure">0.0029</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberSAndPFiveHundredIndex_Member" unitRef="pure">-0.0025</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">0.1242</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributions_MemberS000001463_MemberC000003883_Member" unitRef="pure">0.1081</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception id="Item_11" decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributionsAndSales_MemberS000001463_MemberC000003883_Member" unitRef="pure">0.1056</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberSAndPFiveHundredIndex_Member" unitRef="pure">0.0753</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="pure">0.0564</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributions_MemberS000001461_MemberC000003881_Member" unitRef="pure">0.0531</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributionsAndSales_MemberS000001461_MemberC000003881_Member" unitRef="pure">0.0408</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberSAndPFiveHundredIndex_Member" unitRef="pure">0.0211</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="pure">0.0419</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributions_MemberS000001461_MemberC000003881_Member" unitRef="pure">0.0357</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributionsAndSales_MemberS000001461_MemberC000003881_Member" unitRef="pure">0.0349</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberSAndPFiveHundredIndex_Member" unitRef="pure">0.0303</rr:AverageAnnualReturnSinceInception>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;div style="display:none"&gt;~ http://www.meridianfund.com/role/ScheduleExpenseExampleTransposedMERIDIANVALUEFUND column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;div style="display:none"&gt;~ http://www.meridianfund.com/role/ScheduleExpenseExampleTransposedMERIDIANGROWTHFUND column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001463_Member">&lt;div style="display:none"&gt;~ http://www.meridianfund.com/role/ScheduleAverageAnnualTotalReturnsTransposedMERIDIANVALUEFUND column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001462_Member">&lt;div style="display:none"&gt;~ http://www.meridianfund.com/role/ScheduleAverageAnnualTotalReturnsTransposedMERIDIANGROWTHFUND column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;div style="display:none"&gt;~ http://www.meridianfund.com/role/ScheduleExpenseExampleTransposedMERIDIANEQUITYINCOMEFUND column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_02Nov2011_01Nov2012S000001461_Member">&lt;div style="display:none"&gt;~ http://www.meridianfund.com/role/ScheduleAverageAnnualTotalReturnsTransposedMERIDIANEQUITYINCOMEFUND column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_MemberC000003883_Member" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_MemberC000003882_Member" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:PortfolioTurnoverRate decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001462_Member" unitRef="pure">0.25</rr:PortfolioTurnoverRate>
  <rr:PortfolioTurnoverRate decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_Member" unitRef="pure">0.31</rr:PortfolioTurnoverRate>
  <rr:PortfolioTurnoverRate decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001463_Member" unitRef="pure">0.2</rr:PortfolioTurnoverRate>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberC000003881_Member" unitRef="pure">0.0094</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributions_MemberS000001461_MemberC000003881_Member" unitRef="pure">0.0026</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_02Nov2011_01Nov2012AfterTaxesOnDistributionsAndSales_MemberS000001461_MemberC000003881_Member" unitRef="pure">0.0069</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_02Nov2011_01Nov2012S000001461_MemberSAndPFiveHundredIndex_Member" unitRef="pure">-0.0025</rr:AverageAnnualReturnYear05>
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