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<!-- EDGAR Online I-Metrix Xcelerate Instance Document, based on XBRL 2.1  http://www.edgar-online.com/ -->
<!-- Version:  6.18.1 -->
<!-- Round: 1 -->
<!-- Creation date: 2012-10-01T19:17:56Z -->
<!-- Copyright (c) 2005-2011 EDGAR Online, Inc. All Rights Reserved. -->
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  <dei:DocumentCreationDate contextRef="eol_0001193125-12-408872_STD_1_20121001_0" id="id_303256_EA18E9B4-D8D4-4940-89A4-5E3AEEEF3CA0_1_0">2012-09-28</dei:DocumentCreationDate>
  <rr:ProspectusDate contextRef="eol_0001193125-12-408872_STD_1_20121001_0" id="id_303256_EA18E9B4-D8D4-4940-89A4-5E3AEEEF3CA0_1_2">2012-10-01</rr:ProspectusDate>
  <rr:PortfolioTurnoverTextBlock contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_30">&lt;tt&gt;The Fund pays transaction costs, such as commissions, when it buys and sells&lt;br /&gt;securities (or "turns over" its portfolio). A higher portfolio turnover rate &lt;br /&gt;may indicate higher transaction costs and may result in higher taxes when Fund&lt;br /&gt;shares are held in a taxable account. These costs, which are not reflected in&lt;br /&gt;Annual Fund Operating Expenses or in the Example, affect the Fund&apos;s performance.&lt;br /&gt;During the most recent fiscal year, the Fund&apos;s portfolio turnover rate was 74%&lt;br /&gt;of the average value of its portfolio.&lt;/tt&gt;</rr:PortfolioTurnoverTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_92">&lt;div style="display:none"&gt;~ http://www.managersinvest.com/role/ExpenseExample_S000009875Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_90">&lt;div style="display:none"&gt;~ http://www.managersinvest.com/role/BarChartData_S000009875Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:BarChartTableTextBlock>
  <rr:ObjectivePrimaryTextBlock contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_3">&lt;tt&gt;The Essex Small/Micro Cap Growth Fund&apos;s (the "Fund") investment objective is to&lt;br /&gt;achieve long-term capital appreciation.&lt;/tt&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_18">&lt;tt&gt;This Example will help you compare the cost of investing in the Fund to the cost&lt;br /&gt;of investing in other mutual funds. The Example makes certain assumptions. It&lt;br /&gt;assumes that you invest $10,000 as an initial investment in the Fund for the&lt;br /&gt;time periods indicated and then redeem all of your shares at the end of those&lt;br /&gt;periods. It also assumes that your investment has a 5% total return each year&lt;br /&gt;and the Fund&apos;s operating expenses remain the same. The Example reflects the&lt;br /&gt;impact of the Fund&apos;s contractual expense limitation through October 1, 2013.&lt;/tt&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:IndexNoDeductionForFeesExpensesTaxes contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_62">reflects no deduction for fees, expenses, or taxes</rr:IndexNoDeductionForFeesExpensesTaxes>
  <rr:StrategyNarrativeTextBlock contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_33">&lt;tt&gt;Under normal circumstances, the Fund invests at least 80% of its net assets, plus &lt;br /&gt;the amount of any borrowings for investment purposes, in common and preferred &lt;br /&gt;stocks of small-capitalization U.S. companies.&lt;br /&gt; &lt;br /&gt;Essex Investment Management Company, LLC ("Essex") generally considers a company&lt;br /&gt;to be a "small-capitalization" company if, at the time of purchase, its market&lt;br /&gt;capitalization is less than or equal to the market capitalization of the largest&lt;br /&gt;company included within the Russell 2000 &amp;#xAE; Growth Index. As of the latest&lt;br /&gt;reconstitution of the Index on May 31, 2012, the market capitalization of the&lt;br /&gt;largest company included in the Russell 2000&amp;#xAE; Growth Index was approximately&lt;br /&gt;$2.6 billion. This figure may fluctuate as market conditions change and during&lt;br /&gt;periods of increased market volatility. The Fund&apos;s investments include U.S.&lt;br /&gt;micro-cap companies, which, at the time of purchase, have capitalizations that &lt;br /&gt;place them among the smallest 5% of companies listed on U.S. exchanges or in over &lt;br /&gt;the counter (OTC) markets. The Fund currently invests a significant portion of &lt;br /&gt;its assets in companies in the technology and health care sectors. In addition, &lt;br /&gt;the Fund may also invest in foreign securities, primarily in the form of American &lt;br /&gt;Depositary Receipts ("ADRs") and emerging market securities.&lt;br /&gt; &lt;br /&gt;Essex serves as subadvisor to the Fund and applies fundamental investment&lt;br /&gt;research techniques when deciding which stocks to buy or sell. Typically, Essex:&lt;br /&gt;&lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#x2022;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;Selects companies that demonstrate accelerating growth in earnings and&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;revenues that Essex believes are undervalued given their financial strength.&lt;br /&gt;&lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#x2022;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;Invests in companies from all sectors of the market based on Essex&apos;s&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;fundamental research and analysis of various characteristics.&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt; &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#x2022;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;Reviews and evaluates each company&apos;s financial statements, sales and expense&lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;trends, earnings estimates, market position, and industry outlook.&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt; &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#x2022;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;Values a company against its history, industry, and the market to identify a&lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;relatively undervalued stock as compared to its potential growth.&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#x2022;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;Sells all or part of the Fund&apos;s holdings in a particular stock if the&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;valuation is no longer attractive compared with expectations of the Fund&apos;s&amp;#xA0;&amp;#xA0;&lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;long-term growth.&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&lt;br /&gt;While Essex is committed to a small-cap and micro-cap focus for the overall portfolio, &lt;br /&gt;Essex may decide to keep a company&apos;s stock if it has appreciated beyond the market &lt;br /&gt;capitalization of the largest company included in the Russell 2000&amp;#xAE; Growth Index, as &lt;br /&gt;described above.&lt;/tt&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskReturnHeading contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_1">Essex Small/Micro Cap Growth Fund</rr:RiskReturnHeading>
  <rr:ExpenseBreakpointDiscounts contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_6">You may qualify for sales charge discounts on Class A shares if you or your
family invests at least $25,000 in Class A shares of funds within the Managers
Family of Funds.</rr:ExpenseBreakpointDiscounts>
  <rr:ExpenseExampleHeading contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_17">EXPENSE EXAMPLE</rr:ExpenseExampleHeading>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_63">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.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:ObjectiveHeading contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_2">INVESTMENT OBJECTIVE</rr:ObjectiveHeading>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_43">As always, past performance of the Fund (before and after taxes) is not
an indication of how the Fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:RiskLoseMoney contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_36">There is the risk that you may lose money on your investment.</rr:RiskLoseMoney>
  <rr:RiskHeading contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_34">PRINCIPAL RISKS</rr:RiskHeading>
  <rr:ShareholderFeesCaption contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_8">Shareholder Fees (fees paid directly from your investment)</rr:ShareholderFeesCaption>
  <rr:ExpenseExampleByYearCaption contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_19">Although your actual costs may be higher or lower, based on the above assumptions, your cost would be:</rr:ExpenseExampleByYearCaption>
  <rr:PortfolioTurnoverRate contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" unitRef="pure" decimals="2" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_31">0.74</rr:PortfolioTurnoverRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_64">Actual after-tax returns depend on an investor&apos;s tax situation and may
differ from those shown. After-tax returns are not relevant to investors
who hold their Fund shares through tax-deferred arrangements, such as
401(k) plans or individual retirement accounts.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:BarChartHeading contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_44">Calendar Year Total Returns as of 12/31/11 (Class A)</rr:BarChartHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_38">PERFORMANCE</rr:BarChartAndPerformanceTableHeading>
  <rr:ExpenseBreakpointMinimumInvestmentRequiredAmount contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" unitRef="iso4217_USD" decimals="0" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_7">25000</rr:ExpenseBreakpointMinimumInvestmentRequiredAmount>
  <rr:PerformanceTableClosingTextBlock contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_89">&lt;tt&gt;After-tax returns are calculated using the historical highest individual federal&lt;br /&gt;marginal income tax rates and do not reflect the impact of state and local taxes. &lt;br /&gt;Actual after-tax returns depend on an investor&apos;s tax situation and may differ &lt;br /&gt;from those shown. After-tax returns are not relevant to investors who hold their &lt;br /&gt;Fund shares through tax-deferred arrangements, such as 401(k) plans or individual &lt;br /&gt;retirement accounts. After-tax returns are shown for Class A shares only. After-tax &lt;br /&gt;returns for Class C shares will vary.&lt;/tt&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_40">The following performance information illustrates the risks of investing in
the Fund by showing changes in the Fund&apos;s performance from year to year and
by showing how the Fund&apos;s performance compares to that of a broad-based
securities market index.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:BarChartClosingTextBlock contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_61">&lt;tt&gt;Best Quarter: 27.07% (2nd Quarter 2003)&lt;br /&gt; &lt;br /&gt;Worst Quarter: -29.43% (4th Quarter 2008)&lt;/tt&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceAvailabilityPhone contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_41">800.835.3879</rr:PerformanceAvailabilityPhone>
  <rr:OperatingExpensesCaption contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_11">Annual Fund Operating Expenses  (expenses that you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
  <rr:AverageAnnualReturnCaption contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_66">Average Annual Total Returns as of 12/31/11</rr:AverageAnnualReturnCaption>
  <rr:PortfolioTurnoverHeading contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_29">PORTFOLIO TURNOVER</rr:PortfolioTurnoverHeading>
  <rr:RiskNarrativeTextBlock contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_35">&lt;tt&gt;There is the risk that you may lose money on your investment. All investments&lt;br /&gt;carry a certain amount of risk and the Fund cannot guarantee that it will&lt;br /&gt;achieve its investment objective. An investment in the Fund is not a deposit &lt;br /&gt;or obligation of any bank, is not endorsed or guaranteed by any bank, and is &lt;br /&gt;not insured by the Federal Deposit Insurance Corporation ("FDIC") or any other&lt;br /&gt;government agency. Below are some of the risks of investing in the Fund.&lt;br /&gt; &lt;br /&gt;Emerging Markets Risk-investments in emerging markets can be subject to the&lt;br /&gt;general risks of foreign investments, as well as additional risks which can&lt;br /&gt;result in greater price volatility.&lt;br /&gt; &lt;br /&gt;Foreign Securities Risk-securities or other investments of foreign issuers&lt;br /&gt;involve additional risks (such as risks arising from less frequent trading,&lt;br /&gt;changes in political or social conditions, and less publicly available&lt;br /&gt;information about non-U.S. issuers) that differ from those associated with&lt;br /&gt;investing in securities of U.S. issuers and may result in greater price&lt;br /&gt;volatility.&lt;br /&gt; &lt;br /&gt;Growth Stock Risk-growth stocks may be more sensitive to market movements&lt;br /&gt;because their prices tend to reflect future investor expectations rather than&lt;br /&gt;just current profits.&lt;br /&gt; &lt;br /&gt;Market Risk-market prices of securities held by the Fund may fall rapidly or&lt;br /&gt;unpredictably due to a variety of factors, including changing economic,&lt;br /&gt;political, or market conditions.&lt;br /&gt; &lt;br /&gt;Political Risk-changes in the political status of any country can have profound&lt;br /&gt;effects on the value of investments exposed to that country.&lt;br /&gt; &lt;br /&gt;Sector Risk-companies or issuers that are in similar industry sectors may be&lt;br /&gt;similarly affected by particular economic or market events; to the extent the&lt;br /&gt;Fund has substantial holdings within a particular sector, the risks associated&lt;br /&gt;with that sector increase. Stocks in the technology, industrials, and health&lt;br /&gt;care sectors currently, and may in the future, comprise a significant portion of&lt;br /&gt;the Fund&apos;s portfolio. The technology industries may be affected by technological&lt;br /&gt;obsolescence, short product cycles, falling prices and profits, competitive&lt;br /&gt;pressures and general market conditions. Industrial industries companies may be&lt;br /&gt;affected by general economic trends, including employment, economic growth and&lt;br /&gt;interest rates, changes in consumer confidence and spending, government&lt;br /&gt;regulation, commodity prices and competitive pressures. Companies in the health&lt;br /&gt;care sector may be affected by government regulation, government approval of&lt;br /&gt;products and services, technological obsolescence, patent expirations, product&lt;br /&gt;liability or other litigation, and changes in governmental and private payment&lt;br /&gt;systems.&lt;br /&gt; &lt;br /&gt;Small- and Micro-Capitalization Stock Risk-the stocks of small- and&lt;br /&gt;micro-capitalization companies often have greater price volatility, lower&lt;br /&gt;trading volume, and less liquidity than the stocks of larger, more established&lt;br /&gt;companies.&lt;/tt&gt;</rr:RiskNarrativeTextBlock>
  <rr:ExpenseHeading contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_4">FEES AND EXPENSES OF THE FUND</rr:ExpenseHeading>
  <rr:PerformanceTableOneClassOfAfterTaxShown contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_65">After-tax returns are shown for Class A shares only. After-tax returns for Class C shares will vary.</rr:PerformanceTableOneClassOfAfterTaxShown>
  <rr:StrategyHeading contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_32">PRINCIPAL INVESTMENT STRATEGIES</rr:StrategyHeading>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_42">www.managersinvest.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformanceNarrativeTextBlock contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_39">&lt;tt&gt;The following performance information illustrates the risks of investing in the&lt;br /&gt;Fund by showing changes in the Fund&apos;s performance from year to year and by&lt;br /&gt;showing how the Fund&apos;s performance compares to that of a broad-based securities&lt;br /&gt;market index. Annual returns shown in the bar chart do not reflect front end or&lt;br /&gt;deferred sales charges (loads), and if these amounts were reflected, returns&lt;br /&gt;would be less than those shown. Maximum sales charges (loads) are reflected in&lt;br /&gt;the annual returns table. As always, past performance of the Fund (before and&lt;br /&gt;after taxes) is not an indication of how the Fund will perform in the future. To&lt;br /&gt;obtain updated performance information please visit www.managersinvest.com or&lt;br /&gt;call 800.835.3879.&lt;br /&gt;&lt;br /&gt;The performance information shown in the bar chart and table includes performance &lt;br /&gt;of the Fund&apos;s predecessor, a 401(k) plan trust (the "Predecessor Account"), for &lt;br /&gt;periods prior to the Fund&apos;s inception on June 25, 2002. The Predecessor Account &lt;br /&gt;was not registered with the Securities and Exchange Commission and therefore was &lt;br /&gt;not subject to the investment restrictions imposed on registered mutual funds. &lt;br /&gt;If the Predecessor Account had been registered, its performance may have been &lt;br /&gt;adversely affected. The Predecessor Account was also subject to different fees &lt;br /&gt;and expenses than the Fund.&lt;br /&gt;&lt;br /&gt;Prior to March 1, 2006, the Fund had a single share class, which did not carry a&lt;br /&gt;front-end sales charge (load). On March 1, 2006, the existing shares were&lt;br /&gt;redesignated as Class A shares. Performance for Class A shares below is based on&lt;br /&gt;the performance of the Fund prior to March 1, 2006, and performance for Class A&lt;br /&gt;shares shown in the table is adjusted to reflect the sales charge applicable to&lt;br /&gt;Class A shares.&lt;/tt&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_5">&lt;tt&gt;The tables below describe the fees and expenses that you may pay if you buy and&lt;br /&gt;hold shares of the Fund. You may qualify for sales charge discounts on Class A&lt;br /&gt;shares if you or your family invests at least $25,000 in Class A shares of funds&lt;br /&gt;within the Managers Family of Funds. More information about these and other&lt;br /&gt;discounts is available from your financial professional and in "Sales Charge&lt;br /&gt;Reductions and Waivers" on page 13 of the Fund&apos;s prospectus and "Reductions and&lt;br /&gt;Waivers of Sales Charges" on page 43 of the Fund&apos;s statement of additional&lt;br /&gt;information.&lt;/tt&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_94">&lt;div style="display:none"&gt;~ http://www.managersinvest.com/role/OperatingExpensesData_S000009875Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleNoRedemptionByYearCaption contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_24">The figures shown above for Class A shares would be the same whether you sold
your shares at the end of a period or kept them. For Class C shares, you would
pay the following expenses if you did not redeem your shares:</rr:ExpenseExampleNoRedemptionByYearCaption>
  <rr:PerformanceTableTextBlock contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_95">&lt;div style="display:none"&gt;~ http://www.managersinvest.com/role/PerformanceTableData_S000009875Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact *  ~&lt;/div&gt;</rr:PerformanceTableTextBlock>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_37">An investment in the Fund is not a deposit or obligation of any bank, is not
endorsed or guaranteed by any bank, and is not insured by the Federal Deposit
Insurance Corporation ("FDIC") or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:ExpenseExampleNoRedemptionTableTextBlock contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_93">&lt;div style="display:none"&gt;~ http://www.managersinvest.com/role/ExpenseExampleNoRedemption_S000009875Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:ExpenseExampleNoRedemptionTableTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1001_91">&lt;div style="display:none"&gt;~ http://www.managersinvest.com/role/ShareholderFeesData_S000009875Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:ShareholderFeesTableTextBlock>
  <rr:AverageAnnualReturnLabel contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602440x-9984166" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_2001_83">Russell 2000&#174; Growth Index (reflects no deduction for fees, expenses, or taxes)</rr:AverageAnnualReturnLabel>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602440x-9984166" unitRef="pure" decimals="4" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_2001_84">-0.0291</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602440x-9984166" unitRef="pure" decimals="4" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_2001_85">0.0209</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602440x-9984166" unitRef="pure" decimals="4" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_2001_86">0.0448</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602440x-9984166" unitRef="pure" decimals="4" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_2001_87">0.0217</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602440x-9984166" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_2001_88">2006-03-01</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnLabel contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602440x602366_602488x-9981487" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_3002_78">Class A Return After Taxes on Distributions and Sale of Fund Shares</rr:AverageAnnualReturnLabel>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602440x602366_602488x-9981487" unitRef="pure" decimals="4" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_3002_79">0.1034</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602440x602366_602488x-9981487" unitRef="pure" decimals="4" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_3002_80">-0.0239</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602440x602366_602488x-9981487" unitRef="pure" decimals="4" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_3002_81">0.0425</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602440x602366_602488x-9981487" unitRef="pure" xsi:nil="true" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_3002_82" />
  <rr:AverageAnnualReturnLabel contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602440x602395_602488x-9981487" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_4002_73">Class A Return After Taxes on Distributions </rr:AverageAnnualReturnLabel>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602440x602395_602488x-9981487" unitRef="pure" decimals="4" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_4002_74">0.1590</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602440x602395_602488x-9981487" unitRef="pure" decimals="4" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_4002_75">-0.0287</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602440x602395_602488x-9981487" unitRef="pure" decimals="4" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_4002_76">0.0471</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602440x602395_602488x-9981487" unitRef="pure" xsi:nil="true" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_4002_77" />
  <dei:TradingSymbol contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602488x-9981487" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1002_0">MBRSX</dei:TradingSymbol>
  <rr:AnnualReturn2002 contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602488x-9981487" unitRef="pure" decimals="4" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1002_45">-0.2134</rr:AnnualReturn2002>
  <rr:LowestQuarterlyReturnLabel contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602488x-9981487" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1002_58">Worst Quarter:</rr:LowestQuarterlyReturnLabel>
  <rr:HighestQuarterlyReturnLabel contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602488x-9981487" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1002_55">Best Quarter:</rr:HighestQuarterlyReturnLabel>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602488x-9981487" unitRef="pure" decimals="4" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1002_9">0.0575</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AverageAnnualReturnLabel contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602488x-9981487" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1002_67">Class A Return Before Taxes </rr:AverageAnnualReturnLabel>
  <rr:ExpenseExampleYear01 contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602488x-9981487" unitRef="iso4217_USD" decimals="0" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1002_20">714</rr:ExpenseExampleYear01>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602488x-9981487" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1002_57">2003-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:ExpenseExampleYear03 contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602488x-9981487" unitRef="iso4217_USD" decimals="0" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1002_21">1007</rr:ExpenseExampleYear03>
  <rr:BarChartLowestQuarterlyReturn contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602488x-9981487" unitRef="pure" decimals="4" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1002_59">-0.2943</rr:BarChartLowestQuarterlyReturn>
  <rr:AnnualReturn2004 contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602488x-9981487" unitRef="pure" decimals="4" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1002_47">0.1574</rr:AnnualReturn2004>
  <rr:AnnualReturn2010 contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602488x-9981487" unitRef="pure" decimals="4" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1002_53">0.2801</rr:AnnualReturn2010>
  <rr:ExpenseExampleYear10 contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602488x-9981487" unitRef="iso4217_USD" decimals="0" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1002_23">2210</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear05 contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602488x-9981487" unitRef="iso4217_USD" decimals="0" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1002_22">1322</rr:ExpenseExampleYear05>
  <rr:AnnualReturn2007 contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602488x-9981487" unitRef="pure" decimals="4" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1002_50">0.1745</rr:AnnualReturn2007>
  <rr:BarChartHighestQuarterlyReturn contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602488x-9981487" unitRef="pure" decimals="4" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1002_56">0.2707</rr:BarChartHighestQuarterlyReturn>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602488x-9981487" unitRef="pure" decimals="4" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1002_68">0.1590</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets contextRef="eol_0001193125-12-408872_STD_1_20121001_0_602228x-9981486_602238x-9981485_602488x-9981487" unitRef="pure" decimals="4" id="id_303256_7DB3C6E8-ABA4-4BED-BD12-B840F2C7F01E_1002_14">0.0020</rr:OtherExpensesOverAssets>
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